1. Ratheesh KE's Avatar
    In my BB Z10, Whenever i try to make a call its showing "contact your service provider to check whether your device is authorised to use this network". Why is it So?
    10-02-14 12:31 AM
  2. wxmancanada's Avatar
    Hello, and welcome to CrackBerry!

    Sounds like you're not the only one to have this issue, as it's also been reported on the BlackBerry support forums:
    Contact your service provider to make sure your ph... - BlackBerry Support Community Forums

    Best bet it to reach out to your carrier and see what's prompting this message. Sounds like there's something on the network side of things blocking out access.

    The only thing that comes to mind is possible an IMEI blacklist. Is this phone new? Did you buy it used?
    10-02-14 12:42 AM

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