1. AC Question's Avatar
    After the installation of Marshmallow, I'm unable to send ussd codes. get an error message connection problem or invalid mmi code. Put the sim in another phone and codes were sent and responses received. Any idea how copuld I fix this issue.
    04-11-2016 03:54 AM
  2. itguyjax8430's Avatar
    After the installation of Marshmallow, I'm unable to send ussd codes. get an error message connection problem or invalid mmi code. Put the sim in another phone and codes were sent and responses received. Any idea how copuld I fix this issue.
    Welcome to Android Central!

    Try booting in to recovery and wiping the cache partition. See if that clears out the bugs for you. What phone do you have?
    04-14-2016 12:54 PM

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