Samsung Galaxy S2 — Trying to get service provider

Hello there,

I've got and S II that I recently bought from a friend of mine. The previous provider was Boost, which I guess is basically Sprint.

Now what I would like to do is get a no contract (monthly) 4G plan, but Sprint doesn't really provide anything in that area that is suitable. Boost is no contract but is more expensive than other companies like T-Mobile. Is there any way to make this phone work with T-Mobile or does someone know of a good cheap monthly 4G that I can use this phone with?

T-Mobile has a unlimited web and text with 200 min. for only $30.00/Mo. This I like.

Thanks so much!!