Having issues with getting tablet to work on another carrier and saying imei is invalid?

michaelweaser

    I am having issues with t mobile, I was told by support that the tablet I have is already unlocked, but its not since it says network locked when I try to put another Sim card in it. I keep calling support about it and they say the imei isn't on there network, and doesn't exist, I know its a t mobile because it says t-mobile when it turns on. I don't know what to do.

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