Im purchasing a replacement phone for sprint since my great aunt lost hers...

[Diana]

...and hasnt had one for 3 weeks now? She's a careless driver and person so I was looking into a blackberry curve gold but was from t-mobile the previous owner told me that she had a sprint phone but with t-mobile service. The question I had was will the blackberry curve gold from t-mobile work for a sprint service user, and how would I be able to erase all memory, please reply me a.s.a.p. Please