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#At&t activation code list how to
#At&t activation code list android

The next step to try would be to choose the network operator. However, after performing it, you will have to adjust the options, add Wi-Fi passwords, pair the phone with Bluetooth devices, etc.

#At&t activation code list android

Try resetting network settings on your Android device. To Fix a c onnection p roblem or i nvalid MMI c ode on Android, this method requires you to simply enter the device information mode and activate Radio to Turn on IMS over SMS. It will overlook any error that's in the way. The comma will force the operation to execute. You can use the + symbol after * like *+2904*7#

If your Prefix code is *2904*7#, then adding the comma at the end would do just the trick, which will look like *2904*7#, Reboot your phone and remove any recently installed apps.Īnother simple and effective way to fix a connection problem or invalid MMI code on an Android phone is to add a comma at the end of the Prefix code.If it works, then there is an app causing the Invalid MMI Code error on your Android phone.Enter the Prefix code within the dialer and see if it works eg, “ *135#.

Tap on the prompt, and the phone will boot into Safe mode.

Press and hold the Power button on your device until the power options appear.

To enter safe mode and to find out if there’s a culprit app that may be interfering with the network operation of your phone, kindly follow the instruction below: It does not load any third-party a pps, only pre-installed ones. Safe mode is very similar to a computer’s safe mode. All you have to do is boot your Android device into Safe mode.

#At&t activation code list how to

How to be sure whether a third-party app is responsible for the connection problem or invalid MMI code? It's pretty simple. T here are a lot of users who have found a solution by deleting an app that may have been causing the MMI code error. The best option, to begin with, is disabling some third-party apps. How To Fix Connection Problem or Invalid MMI Code The error pops up when the provider has some problems on the network or when there are SIM authentication issues. While country cell phone providers vary, invalid MMI code error is usually found on dual SIM smartphones. What causes Connection Problem or Invalid MMI Code You usually see this error when you are about to check your account balance, top-up, recharge, or perform any function designed by your SIM service provider, like adding a voucher to run a USSD code. One of the problems that may pop up is a connection problem or an invalid MMI code. Android phones are great, but you may face some issues from time to time.