2016. 7. 23. · Re: Connection Problem or Invalid MMI Code. 23-07-2016 06:15 PM.You need to enter *#1345# to get your balance, not #1345#. The MMI code is the code we use containing *# codes, if you are using #1345# without the initial star, you will get the message invalid MMI code or connection problem. Try again using *#1345#. 1.Reboot your Android device. A mobile code that starts with a star/hash (*#) prefix is known as an MMI code. MMI codes are input in the same way that phone numbers are to get a range of information and to enable and disable certain functions. Entering *#06# on a GSM phone, for example, displays the model and serial number (see IMEI). Fix Connection Problem or Invalid MMI Code. 1. Restart your device. Simply reboot your device and hope for better results. Often this trick resolves all the common issues. The steps to reboot/restart your phone are as follows: 1. Long-press the power button. In some cases, you may have to press the volume down + home button until a menu pops up.
When you want to fix the invalid MMI code message, it will allow you to start making calls and text messages. But there are several ways to fix Android connection problem or invalid mmi code that will be. TracFone - $39.99 Basic Phone Card [Digital] Model: TRACFONE ... Works with many GSM compatible. 2013. 12. 21. · If your phone turned OFF and back ON, start from Step 1. Otherwise, please start from Step 3: Press the OK key. Using your navigation keys, go to “ Code Entry Mode” then press the OK key. Your screen should now display “ Code .”. Please enter the following numbers: 8931 7599 1742 9137. 2892 9851 5166 0711 1201 6736 7288. This secret code shows the status information for your GSM Network. Android *#9900# Bring your device to the System Dump menu, which allows you to boost your network speed, WiFi, and battery. USSD Codes For iPhone: iPhone MMI Code List. Use these iPhone USSD Codes to access hidden features, tweak your iPhone settings, and make your iPhone.