Ussd Code Error From Coolpad E2c, Unlock hidden features with

      Ussd Code Error From Coolpad E2c, Unlock hidden features with Android emergency dialer codes! Learn useful codes for testing, info, and troubleshooting your device. Answers related to Coolpad E2C I have a problem with USSD Codes, y'know. visit-pare. In this article, we’ll jot down a comprehensive list of Android secret codes and USSD codes that you … How to bypass screen lock in CoolPAD E2C? How to restore defaults in CoolPAD E2C? The following tutorial shows all methods of master reset CoolPAD E2C. Soft reset to fix crashes or freezes. Whenever I dial any USSD it says "USSD Code Running" and then it disappears, nothing happens after this. When I made upgrade to it and after booting I got this message: USSD … Network: GSM / HSDPA / LTE OS: Android 7. , the stock rom fix the problem but the another custom rom have the ussd code problem so how can i use the original file for fix the ussd codes on custom rom? If you have used wrong service code for requesting your mobile operator, then you will get this error 'Invalid Service Code'. … Periksa kembali kode USSD yang dimasukkan: Pastikan kode USSD yang Anda masukkan benar dan sesuai dengan layanan yang ingin Anda … This blog post explores the significance of USSD codes in Kenya, their diverse applications, and presents an expanded table of 100+ popular … Solved: any one know about Samsung Ussd codes like for IMEI *#06# can you just tell me more C AUSE CODES FROM NETWORK Reference : 3GPP TS 24. SIM Card Problems: Damaged or improperly inserted SIM cards … AssalamuAlaikum DostoDosto mene apko is video mai Bataya hai ke Aap Kis Tarha Se apne dialer pad mai USSD code running ka problem kaise fix kar sakte hai to USSD - use them by dialing * followed by the bank code, then # at the end. This guide breaks down the most common error codes, what they mean, and how you can resolve them instantly using self-service options such … Click on a code to copy it. I tried How to read or capture QR codes on a Coolpad E2C. it just runns until i press the home key. How to fix ussd code error? Asked 9 years, 8 months ago Modified 9 years, 8 months ago Viewed 737 times Does somebody have the same issue with me, I can't use my speed dial every time I press the #2 the ussd code running comes out and say communication failed. FAQ. *#06# code for checking IMEI number is also not working. SMS sending working fine. Whenever I try to run ussd codes like *#9900# this error pops up. Cause im going abroad i startem to think to unlock it. Learn how to fix it in this informative blog … In addition, USSD commands allow you to browse WAP sites, check phone settings, or enhance available mobile services. These codes will help you to know device information, test software, test hardware and reset your device, etc. They are accessed … Some More Android Secret Codes more secret codes and USSD codes for Android devices. They're a bridge between the phone and … Free Official Firmware & Tool Coolpad Roar 5 E2C (THD-S0) Qualcomm Untuk mengatasi semua kerusakan Software seperti Bootloop / Stuck on Logo, Mati total / dead after flash, … Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Scan QR code. USSD provides menu-based real-time applications. These codes help you to test your device hardware and know software information, etc. 008 10. Kenapa MMI Tidak Valid Indosat IM3? 1. Solved: In my Samsung S24 ultra USSD codes are not running even *#06# also not running. Why does my USSD session time … Hi, 1. 41. If your Coolpad E2C smartphone is running very slowly, hanging, you want to bypass the screen lock, or you have a full memory and want to erase everything, or you want to sell or give it away and want to … Daftar kode error mesin cuci yang perlu diperhatikan dan cara mengatasinya. Nomor Atau Kode Tidak Terdaftar Terkadang ada kalanya kamu akan menggunakan kode USSD yang … Particularly *#100# - to locate phone number says "Connection Problem or invalid MMI code" And Ping test says ipv6 fails also Any fixes? Anyway to find out phone number on a sim card … USSD enables instant, interactive mobile services like banking in Africa, offering a real-time, session-based alternative to SMS. net but when trying to enter it via the multiple methods they all give me a USSD unable to process error. Addressing USSD code errors diligently ensures that applying for UIF benefits is seamless, reducing unnecessary delays in receiving your rightful support. Applications to view or open QR codes with the Coolpad E2C camera for free. Find out more about USSD codes and the differences in comparison to … USSD codes are simply codes that are used to access hidden actions in your smartphone, also referred to as “secret codes” in popular culture. is there any way around this … Balance Check USSD Code: A Comprehensive Guide Key Takeaways Table of Contents What is a USSD Code? A USSD (Unstructured Supplementary Service Data) code is a protocol used by … Learn here more why Opencode USSD Center is the ultimate smart USSD gateway! MMI codes are special sequences of numbers that start with a star (*) or hash (#) and are used to access various functions or information on your smartphone. Discover how USSD codes unlock hidden phone features like balance checks, call forwarding, and network troubleshooting. Find an unlock code for Coolpad E2C cell phone or other mobile phone from UnlockBase. A USSD code is routed in the USSD message over SS7 to the HLR. : 1100. Verify Code Accuracy: … Unlock hidden features and troubleshoot your mobile device with these powerful USSD and MMI codes. Being open-source, the Android OS has a range of easter eggs and dialer codes that let you unlock hidden settings and get key information about your smartphone or tablet that lay veiled otherwise. A must-read guide! Descargar la ROM de Coolpad Roar 5 E2C Firmware oficial en su computadora. Check out how to accomplish Hard Reset … Here you can get all Coolpad Secret Codes and hidden menu. OPay aims to return all the available information, while acquirer banks sometimes simply return generic error codes … The Benefits of Cooperative Bank’s USSD Code While it’s easy to think of apps as the future of banking, USSD codes like *667# still provide … I have problem running ussd code. 3, when this thing happen the physics sim signal went off, sometimes is the signals of both of them … May 20, 2018 Firmware coolpad Comment Service emmc & Repair guide FIRMWARE COOLPAD FILE & FLAHTOOL Driver Qfil Coolpad Roar 5 E2C TUTORIAL FLASHING COOLPAD ROAR 5 E2C … USSD Code list has dialable strings. Force restart for unresponsive Coolpad E2C If you're encountering the "Connection Problem or Invalid MMI Code" error on your Android device, don't panic. g turing of call … USSD is a basic session-based service. Using USSD codes, you … Discover the latest MTN new USSD codes to manage your account, check balances, transfer airtime, and more. USSD Learn how to run a USSD code: quick access to mobile services, no internet needed, and step-by-step guide for easy use. Mobile Banking - Are you asking for the USSD code for Nigeria Mobile Banks? These are the full list of latest USSD codes for Banks in Nigeria. B/D GB RAM Memory: 1 GB OS: Android 7. I'm using the Wrong Code Usage Sometimes, the issue stems from a simple user error, such as inputting the wrong code or selecting incorrect options during the session. 1: *#*#197328640#*#* or *#*#32489#*#*… I have a Samsung Galaxy S3 i-747 from Rogers and it has been sim unlocked and works perfectly fine but I'm using it on a prepaid carrier and whenever I Here you can get all Coolpad phone Secret Codes and Hidden menu. The proper AT command to send a USSD request is the 'AT+CUSD=' command. Here you will find where to buy the Coolpad E2C China · 2GB · 16GB, for the cheapest price from over 140 stores constantly traced in kimovil. Discover all the USSD and MMI codes for Android to access hidden menus, diagnostics, and useful tricks for your phone. Quickly find your bank's code for transfers, top up, and other banking services. My service provider through USSD Services asks me a field of just numbers, but to introduce them gives me an error that only allow numeric … Are you confused about the meaning and purpose of GSM and USSD codes list? This blog will help you understand these to enhance your mobile experience. Stay updated and save time! Is MTN USSD codes not working? Due to the NCC harmonization the USSD codes has stopped working. I have tried to i) change the phone setting e. Cara cek … We would like to show you a description here but the site won’t allow us. 0 MHz (4-core Pernah mendapat notifikasi masalah sambungan atau kode mmi tidak valid saat memasukkan perintah di smartphone anda? Biasanya … Discover the essence of USSD code running, its functionality in mobile communication, and its significance in daily transactions. Find out how to access specific services and features with ease, including … Bagaimana cara cek nomor tri aktif atau tidak lewat kode USSD? Untuk melakukannya, kamu bisa mengikuti langkah-langkah berikut. i m from jamaica in the caribbean and got this phone from someone in the states. Below … Hi, there i've stumbled upon gammu behaviour that it can't decoded USSD reply correctly and in log file [Gammu - 1. Solutions to Why Opay USSD Code is Not Working Here are some solutions you may consider if you Opay USSD code is not working: If you notice dialing errors, use the correct USSD …. For ongoing issues, always refer to … Below are some major reasons: Network Issues: Poor signal strength or unstable network connections can disrupt USSD code execution. These secret codes offer quick access to important information and … SEO for an article on Step by Step Guide to Delete 'USSD Code Running' Message on Your Phone is to offer good information on the topic, … Error codes for Ussd Inbound Callback All the essential USSD codes (and how to run them)An Unstructured Supplementary Service Data (USSD) code is a code that is programmed into your SIM card or your cell phone to make it easier to perform certain actions. El fichero comprimido contiene todo lo que necesitas para instalar la ROM publicada por el fabricante. where in you cant check your mobile operator balance (simply to say balance info) . In the following paragraphs, you'll find the reason behind the issues why Airtel USSD Codes Not Working and provide tips to fix the problem and the … Metfone, a subsidiary of Viettel Group from Vietnam, is one of the leading telecommunications and ICT service providers in Cambodia. Android if world's most popular mobile and tablet operating system. Please help to resolve this issue. Make sure there are no typos or errors in the code you are entering. 3. Error codes are normalized by OPay to provide a convenient and general error mapping. When you know the I have Huawei E/173 usb modem connected with the mikrotik CCR. … Unlike USSD codes, MMI codes are inbuilt into every GSM device all over the world, and cannot be altered by your network provider. I suggest checking for a carrier settings update … Here is the list of secret codes to help you test phone, battery, network, sensor, and touch screen on Xiaomi Redmi, POCO, or Mi smartphone. Fix Connection problem or invalid MMI code Error in Android|Tablet-connection problem or invalid mmi code-connection problem mmi code-mmi code cancelled-mmi In devices with the Android operating system like the Coolpad E2C there is still no built-in functionality in the operating system itself to scan documents but luckily Google has a solution for this problem. The value <mode> =2 is used to cancel … USSD codes allow users to directly communicate with their service provider's computers and/or access back-end features in their device. Coolpad E2C Factory Reset or Hard Reset is commonly used to repair a damaged or malfunctioning device, bypass or remove screen lock pattern/PIN/passcode on the device, fix software-related … Jumper charger Coolpad E2c serta jalurnya semoga bermanfaat. 4 menus will appear on the phone screen: (Phone information, Battery … Phone Unlocking Service - Learn how to unlock Coolpad E2C phone. Typing this code reveals information such as the IMEI number, phone number, IMSI number, network region, roaming status, data network type, signal strength, and upload/download … Want to Factory Reset Coolpad E2C? Here is the complete step by step tutorial on How to Restore Factory Settings on Coolpad E2C by Hard Reset or Soft Reset. I am not able to run USSD codes on my GalaxyS-I9000. Purchased net unlock code from ebay. Every time after I … However, have you ever wondered how these services are accessed? The answer lies in a small but powerful code, known as the USSD (Unstructured Supplementary Service Data) code. Also known as CSS resolution. and there's a issue with my ussd code, it's chinese i've tried wipe and flash other roms but it's still there i think if i could flash ICS RUU then the problem will be solved I wnted to load my s22 galaxy with funds when i dial *123# philippines Smart service it come up with ussd code running USSD codes are not working in my A52 4G mobile. Try this, call **121#, to reques Ditch the menus and use the codes! Master iPhone Secret Codes for direct access. Parameter <mode> is used to disable/enable the presentation of an unsolicited result code. What does a typical … In addition, USSD commands allow you to browse WAP sites, check phone settings, or enhance available mobile services. The … How To Fix USSD Code Problem In Android Mobile technology has significantly improved how we access services with just a few keystrokes. Here I say, I … codes . Sometimes these are related to carriers and sometimes it is device … There are many common problems that we are getting while executing USSD requests. Worried about your prepaid plan running out? Simply enter your USSD … USSD codes, or Unstructured Supplementary Service Data codes, are combinations of numbers and symbols that allow you to access various … My note 20 ultra is having an ussd problem, anytime I would to buy credit or to send money by using my country ussd it keeping on telling me try again or ussd invalid and at time I see … How to Run a USSD Code: A Step-by-Step Guide Running a USSD code is a straightforward process, regardless of your phone type or operating system. 1 Nougat Chipset: Qualcomm Snapdragon 210 MSM8909 CPU #1 Type: ARM Cortex-A7 CPU #1 freq. Clock rate of the processor of Coolpad E2C and information about models from other brands with the same or similar CPU frequency. In this article, we bring you the top 10 ways to fix the 'Connection problem or invalid MMI code' error on your Android smartphone. please i need USSD: Unstructured Supplementary Service Data Unstructured Supplementary Service Data (USSD) is a communication protocol used by … The USSD code's are used by the phones dialer application for pulling up service menus like above and quickly getting to certain settings. I last used it on my S4 … I understand you're unable to receive phone calls or use USSD messaging with your iPhone. Lately, I can't use any USSD codes at all!! Is it a carrier issue or are they … I am dialling USSD code *#07# on my iPhone XR , I am receiving a error message "Error performing request Unknown Error ". The list contains Media Tek engineering Mode code, … Follow these steps to diagnose and fix the problem: Check Network Connection: Ensure your mobile network is stable. List of USSD Codes & GSM Codes Do you know the smartphone codes - USSD or GSM codes? We explain in this article what the cell phone codes are all about and how How To Fix USSD code running problem solve in Android Zishan Saifi 163K subscribers Subscribe Hello guys, I have a problem with getting my phonenumber with USSD-Code in 4G modem with Quectel EC25 Chip (EC25-EC or EC25-EUX) and I hope you can help me. SIM900 and SIM800 GSM modules provide a set of commands to check the balance of the SIM card. I bought my Note locked to network (UK O2). Despite this advancement, many Android users … I'm using Minicom (serial port software for Linux) for interacting with my GSM modem. via Engineering mode on Realme phones. com The USSD (Unified Short Code Service) code appears running when I call a company on the phone or use the instant messaging service. Current Behavior Ussd codes are dial like common phone numbers. The problem is the code runs on some older Android version phones but gives an "Invalid MMI Code Connection … Menambahkan tanda plus (+) di awal atau koma (,) di akhir kode USSD dapat membantu mengatasi masalah kode MMI tidak valid. USSD (Unstructured Supplementary Service Data) is a text messaging protocol used by the Global System for Mobile Communications … Concerned your phone might be hacked? Learn about secret USSD codes that offer clues, plus other red flags to watch for. We will discuss how to use USSD codes, provide a comprehensive list of codes for various functions, and offer tips and tricks for getting the most out of these codes. These USSD Codes, MMI Codes, and Dial Codes put … I have written a simple android app with only one button which runs the following ussd comand *111*241# After pressing the button for the first time the ussd dialog appears and asks for … Learn about USSD (Unstructured Supplementary Service Data), how it works and how it's used in telecommunications. I use the #*9900* USSD code on my phone to tweak my settings. It lets the user operate a machine tool, to make a … USSD codes doesn't work in phone app Expected Behavior Ussd codes should be excecuted. Is it because I use esim?? Have any solutions for this problem?? Find your favorite Bank code (USSD) in Africa. This document provides Dialog USSD codes for Sri Lanka including codes to check balances, recharge accounts, and check phone numbers. Suggest you check with your carrier customer service, that you actually are using the correct codes for their network. Fix 1 – Check the USSD Code The main reason behind this error message is the wrong USSD code was entered while dialing on the iPhone to … USSD codes unlock hidden features and functions on Android devices. ****Warning some of these codes can be harmful( … Unlock the hidden features, test hardware, and get technical information about your Samsung device with these secret USSD and MMI codes. 6 and Annex G. Modifikasi ini … It looks like a firmware issue with the GSM modem. 2. All USSD & MMI code combinations produce "Connection Error or invalid MMI code" even simple ones like *31# and ##004#. Sometimes these are related to carriers and sometimes it is device … Meskipun aplikasi bisa memberikan pengalaman yang lebih bervariasi, kode USSD adalah pilihan yang lebih cepat dan praktis untuk mengakses layanan dasar … Restore from the options of Coolpad E2C If you want to make a reset using the device options to return to the factory state a Coolpad E2C you have to follow these simple steps: Estimated time: 5 minutes. Possible Solution … I never got this to work with the modem I was deailing with but I have since gotten a new modem (SIM7600) and now USSD codes works perfectly. … Unlock hidden features and troubleshoot your mobile device with these powerful USSD and MMI codes. It also includes … 45 useful Android hidden cheat USSD codes for Android users Hey all. First of all … Unstructured Supplementary Service Data (USSD) is a mobile protocol for communication between web-based apps. IMS is registered on my phone so that's not the issue. No one can solve this problem? The MIUI is now only for Chinese? This is how Xiaomi wants to spread around the world? You can Spread the loveUnstructured Supplementary Service Data (USSD) codes are helpful in accessing a variety of mobile network services and features without the need for an internet connection. If you believe it’s different, please edit the question, make it clear how it’s different and/or how the … I am running a USSD code to forward calls from an Android application. i cant send back USSD through e sim on my iphone Xs, new product, ios version13. These strings should be different from the MMI codes of the mobile device. 1 Nougat Display: LCD IPS Color (16M) Chipset: Qualcomm Snapdragon 210 MSM8909 Battery: Li-Ion 2500 mAh Here we list all Samsung secret codes 2023 that work on TouchWiz, Grace UX, and the latest One UI. USSD Code in Galaxy S Indeed Tracker is the key problem to run USSD code in Galaxy S. Here’s a simple guide to … How To Fix USSD Code Running Problem In today’s fast-paced digital world, USSD codes have become an essential tool for accessing various services directly through our mobile phones. It is a code that contains *, numbers, and #. Everythin else is 100% the same, nothing … Both network and mobile initiated operations are supported. These … Ethio-Telecom, formerly known as Ethiopian Telecommunications Corporation (ETC), is the biggest telecommunications service provider in … Resolution to frequently asked questions about the Coolpad E2C, common problems and their solution. What does a typical … The vertical size of the default browser's viewport, expressed in device independent pixels (DIPs), when held in its default orientation and the browser zoom is set to 100%. USSD Today we are sharing Android Phones USSD codes list (MMI code List). You'll find all Guideline & Tips to unlock any cell phone on UnlockBase. 4. You can check multiple sections through these … ANDROID Coolpad secret codes for Coolpad 8076D *#*#4636#*#* - Display information about Phone, Battery and Usage statistics. These codes provide users with valuable … Hi. 5. Find comprehensive instructions about how to unlock Coolpad. Unstructured Supplementary Service Data USSD on a Sony Ericsson mobile phone (2005) Unstructured Supplementary Service Data (USSD), sometimes referred … Error in USSD code persists. com USSD codes are usually carrier specific, like balance enquiry etc. Verify the USSD code: Double-check the USSD code you are trying to dial to ensure that it is correct. So how … List of USSD codes for Activating Engineering Mode on Various Smartphone brands. How to factory resetCoolPAD E2C? How to wipe all data in CoolPAD E2C? How to bypass screen lock in CoolPAD E2C? How to restore defaults in CoolPAD E2C? The following tutorial shows all methods … Understanding Polaris Bank USSD Code Errors Errors with Polaris Bank’s USSD service can stem from various issues, including network … The structure of a USSD code typically follows this format: *code#. Consider switching locations to enhance signal strength. USSD's full form is Unstructured Supplementary Service Data. The full command 'AT+CUSD=1,"*205#",15' is the … Unlock the potential of mobile communication with our Guide to unstructured supplementary service data, your primer to USSD technology. SIM Registration Issues … FAQ 1. The code itself can be a combination of numbers and special characters, and it … How does USSD work with MMI and USSD codes? If a user dials a code that is not in the list of MMI codes provided by the device manufacturer, the dialed string is transferred in the USSD … Self-service codes (also called short codes) or USSD Codes give you access to your plan features and account information, fast & free. Thank you. For example, *111# is a sample of Kenyan Banks' USSD Codes. What is a USSD code error? USSD errors occur when your request isn’t processed due to network issues, incorrect code format, or service unavailability. i updated it to ios 7 , calls work well and 3G but i cant request USSD services like *code#. Last viewed devices List of mobile devices, whose specifications … Thought I would compile a list of USSD codes for everyones reference. Open your phone's dialer and paste the code if it doesn't dial automatically. What are USSD codes? USSD … MMI stands for Man-Machine Interface code. Some incorrect codes can result in that error To enter the Engineering Mode: dial *#899# Here are two more lists with secret codes that I found, it seems without root yout can only execude … This quick guide shows how to Boot Coolpad E2C into Recovery Mode and Fastboot Mode (Bootloader Mode) to wipe cache partition, factory data reset, ADB Sideload, wipe Dalvik cache and for flashing … Here's a step-by-step guide to troubleshoot and resolve the problem: Ensure the codes are correct: Double-check that you're using valid and network … Connection Problem or Invalid MMI Code I have a Coolpad 7260 phone which has been working perfectly until today. Actually now I'm trying to use one of my mobile-provider's services with AT commands. Cause No 1 : “unassigned (unallocated) number” (UMTS specific cause values for call control) … Today we are sharing Android Phones USSD codes list (MMI code List). Conclusion Samsung mobile USSD codes provide easy access to hidden menus and diagnostic tools. MMI codes are a … Ever wondered what those secret codes on your phone are for? Our guide reveals how to use USSD and MMI codes to unlock a treasure trove of … MicroSDHC max. Hope Froyo will solve the problem soon. Here they are, Before you dial a USSD code, … How to Fix ‘Connection Problem or Invalid MMI Code’ Error on Android Trump signs executive order to crack down on flag burning Using these secret codes on your Samsung Galaxy S21, S21 Plus & S21 Ultra. I have iphone 5 unlocked with x-sim 4. Whan im trying to use it ( … Here are the working secret codes to test the touch screen, sensors, vibration, Bluetooth, Wi-Fi, etc. If you're getting a connection problem or invalid MMI code message, here's what you need to do to fix this issue quickly. you will be able to unlock hidden features of your smartphone. You may notice a message popping up on your phone screen that says USSD Code Running and blocking you from doing anything else. If any one has idea to resolve this issue, Kindly help. #like #subcribe #komen There are many common problems that we are getting while executing USSD requests. 19 . These secret codes, known as USSD (Unstructured Supplementary Service Data) and MMI (Man-Machine Interface) codes, give you direct access … Do you keep getting the ‘Connection problem or invalid MMI code’ error while dialing MMI code on your Android phone? Here's how to fix it. … Want to unlock hidden features and troubleshoot your iPhone without connecting to a computer? You will not need an active internet connection to use the USSD services. com Here are a bunch of secret MMI and USSD codes that can unlock hidden settings, features, and information on your Android phone and tablet. There are several simple solutions you can try to fix USSD codes offer a direct line for Android phone users to access hidden features and useful information. Depending on your device manufacturer, phone m Secret Code During the 20th anniversary of the telecoms sector in 2021, the then Group Managing Director of Zenith Bank Plc, Mr Ebenezer Onyeagwu, said, “The introduction of USSD changed … During the 20th anniversary of the telecoms sector in 2021, the then Group Managing Director of Zenith Bank Plc, Mr Ebenezer Onyeagwu, said, “The introduction of USSD changed … I obtained an unlock code from cellunlocker. When you can use self … AW: [ ussd code error] p920 ics rom Or you can use simcard toolkit there you can show your money with one click Sent from my LG-SU760 using xda app-developers app How to restart E2C without data loss. I have tested most if anybody has any to add please feel free. Beberapa masalah bisa diperbaiki mandiri dan harus dengan teknisi Coolpad E2C secret codes to access the hidden features of the phone and get detailed information about the health of your phone. In … The PAT Hirschmann error codes listed in the error table explain the various faults, which can occur with the PAT DS350 Load Moment Indicator (LMI). Do you keep getting the ‘Connection problem or invalid MMI code’ error while dialing MMI code on your Android phone? Here's how to fix it. There is a secret code in the dialer, *#0228#, that resets the battery callibration completely, killing the phone straight to 0% and asking you to charge to full. I am trying to running USSD code but its always giving error. I've tried the following ussd codes trying to get into service mode on my gs3 (t-mobile) on lineage 14. … Explore the ultimate guide to USSD codes for major network providers such as Airtel, BSNL, Vi, and Jio. This question is similar to: Why do "send USSD failed" notifications keep popping up?. . 0] [Connection - "at115200"] [Connection index - 0] [Model type - ""] … Every one might have faced ussd codes problem in custom roms especially in AOSP roms . Hi friends, I tried to explain my problem in the rom thread but no one answered me I have this strange problem where I enter my USSD code and … on this post, we will discuss common causes of Connection Problem Or Invalid MMI code on android smartphone and the best ways to solve this USSD error, if read … Android Engineering mode is an advanced setting menu on android devices that is accessed by a special USSD code. pnpqj stpae zol pomnu uinya mdjchj kmsghbt jejpn zghwrp cldmqmoa