Is your internet/mms not working at all or you just can't access apps? If it's not working at all, did you program the username/password which you can either do via workshop or ##000000.
In order for streaming media and some (not all) apps to work on a flashed blackberry, the phone has to be in Cricket's system as an Android phone and be on the 60Z Android rate plan. Contact your local dealer and be willing to pay them $15 for their trouble.
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