1. gorimapa's Avatar
    Hello:
    How can I solve USSD failure on Samsung?
    When I attempt to use the USSD code, in very many instances, I hear invalid MMI code, or connection error.
    I've tried out some techniques I learnt from google search, but they didn't work. Such techniques include typing a comma after the code has been typed, or using a colon sign, or the * sign. All these don't work for me. I also learnt about accessing the phone's test screen, by dialing *#*#4636#*#* without tapping the call button. I've done this, but the test screen does not open. Nothing gets activated.
    Please what can I do about this problem.
    I use The Samssung galaxy grand prime plus phone G532, running android Marshmallow 6.01.
    Please kindly give me a comprehensive answer when answering this question.
    Thanks in advance.
    10-19-2020 09:54 PM
  2. mustang7757's Avatar
    The secret dialer codes , some work for certain carrier while others don't . Did u look up for your carrier? What you looking for doing this ?
    10-19-2020 11:20 PM

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