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This device is T-Mobile's version of the Samsung Galaxy S II. It was released in October of 2011. It was the first Galaxy to include T-Mobile's new expanded 4G network.

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Why is my phone not turning on?

Every time I turn on my phone, it opens for a few seconds then it turns off again, vibrating constantly. I tried charging it but the results are still the same. Help!

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Hello,

When you say that "it opens for a few seconds," do you mean that the phone boots up but not completely? To what point does it boot before resetting? The constant vibration is usually a sign of a bad battery. How long has it been since the battery has been replaced? A replacement battery is cheap and the quickest test you can do, so start there. Good luck.

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