1. CrackBerry Question's Avatar
    I can only load and check my credit balance with mtn only,when i switch sim cards to airtel,orange..i cannot use the ussd codes.when i use them intead of retrieving my balance or load credit..it goes out like any other out going call.
    Its only the mtn sim that works well in the phone..i cannot use any other sim.
    06-06-15 02:37 AM
  2. izukingz's Avatar
    Maybe your phone is network locked.

    Posted via CB10
    06-06-15 06:19 AM
  3. scrannel's Avatar
    Maybe your phone is network locked.

    Posted via CB10
    That or, perhaps you need BIS from the other networks you are trying.
    06-06-15 12:45 PM

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