Guide: How To Fix Connection Problem or Invalid MMI Code On Android Device

There are several reasons why the “Connection problem or invalid MMI codeError message pops up, could be the main reason that there are problems with carrier provider or problems with SIM authentication on smartphone. Following are several methods to fix the connection problem or invalid mmi code on Android device.

  1. Resetting network settings on Android device: This is one of the most common methods to fix connection problem or invalid mmi code on Android device. Resetting network settings will restore your phone to its factory default settings and should resolve most issues with connecting to cellular networks. To reset your network settings, go to Settings > Wireless and Networks > Mobile Networks > Reset Network Settings.
  2. Restarting your Android device: Another method to fix connection problem or invalid mmi code on Android device is restarting your phone. This will usually clear any temporary issues and hopefully reconnect you to the network. To restart your phone, press and hold the power button until the phone turns off and then back on again.
  3. Troubleshooting SIM card: If you’re having trouble connecting to a cellular network, it’s possible that there’s something wrong with your SIM card (in which case you’ll need to get a new one). If you’ve tried resetting your network settings and restarting your phone but still can’t connect, try troubleshooting your SIM card by following these steps: Remove the battery from your smartphone if it’s possible (this will disable some features), remove the SIM card, turn off airplane mode, turn off data roaming, turn off NFC (if applicable), turn off Bluetooth (if applicable), turn off Wi-Fi (if applicable), then reinsert battery and SIM card into smartphone and try connecting again. ..
  • First, go to the phone’s settings and then press and hold the “Power” button and the “Home” button simultaneously until the phone turns off.
  • Then, go to the “System” menu and select “Prefix code.”
  • After adding a comma at the end of the prefix code, press and hold the “Power” button and “Home” button until the phone turns on.

If you have a Prefix Code of (* 29047 #), then add a comma at the end, similar to this ( 29047 #,) You can use the + symbol after , similar to this ( + 29047 #) ..

To activate the radio and switch on IMS, send a text message to 9-1-1. ..

Check the network settings on your device to see if you are connected to the correct network.

How To Fix Connection Problem or Invalid MMI Code On Android Device: benefits

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Final note

If you are having a connection problem on your Android device, or if you have received an invalid MMI code, then this guide can help you fix it. This guide is specifically for Android devices, but the principles should work on any mobile device. If you’re not sure how to fix a connection problem on your Android device, then read our other guides: How To Fix Connection Problem and Invalid MMI Code On Android Device.

If you have any queries about the How To Fix Connection Problem or Invalid MMI Code On Android Device guide, please comment below or contact us directly. This guide is for educational purposes only. If you want to correct any misinformation about the guide, please contact us. If you want to add an alternate method to the guide, please contact us. Our contact page is available for questions and concerns. You can also follow us on Facebook, Twitter and Instagram for updates. We answer questions within 24-48 hours (weekend off). ..