I had the 8130 for verizon, and the trackball went out after a while, but I think it's because I semi-modded it by taking out the trackball and putting a piece of colored tape to change the color of the trackball...

I won't do that in the 8100 for t-mobile, but also,

after a month and a half of texting the key board started to get rubbery..

like all the keys would move when I texted..

is the 8100 for t-mobile like that?

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