i got a 450 from metro pcs when i got their service then i got a micro sd card and hook it up to my computer it worked fine the first time then every time after that it would not go. i remember the first time i was able to see the phone on my machine a little message came up on my phone asking if i wanted to connect to my pc now i dont get that message any longer and this horrible phone wont be found some please help if you can

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