@TreKing I think the OP meant GPRS, not GPS. @pramod.deore I have some problems with your question. Android tries hard to not leave data laying around when an app is uninstalled. Aside from TPM, there's no 100% sure way to keep someone from reusing a trial version. All you can do is increase the effort required to do so, but that will require effort by the developer. I do not know how valuable your app would be to me. However, on the face of it, if I had to uninstall and reinstall your trial app every two weeks, the question is would I 1) stop using it (and not buy it), 2) continue using the trial (spending my time periodically reinstalling it), or 3) buy your app. Each is possible.
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