Tmobile iphone 5 prepaid plan?

I bought an unlock iphone 5 from apple, I wanted to know if I could use the 30/per month plan tmobile offers? When I look through their website, the only prepaid plan I see it's the "simple choice plan" for 50/per month. Also do they have the nano sim card? Are they a %100 contact free and no hidden fees? Also how much will i paid for the first month, example activation fee?

The plans are truly not contracted, and since everything is truly unlimited, there's no overages, unless you call outside the US, use 411, or download things that cost money. Activation is usually a 35 dollar fee (unless they waive it), then a partial charge for your services (usually 5-10 day bill) followed by a full bill cycle charge. Your first bill is always going to be a bit higher than usual because of all the prorated charges. You can expect your bill to be around $50 or $60 (if you get the mobile hotspot package) before taxes, and there's no cancellation fee if you decide to leave early.