Can I transfer my number to t-mobile?

I plan to get an iphone 5 from t-mobile. I have the 4s with sprint.

Yes you can

Yes you would need your account number pin number or password and billing info from your account ;-)

Yes you can but if you are switching to tmobile, check this out, you can get the tmobile service free
https://www.solavei.com:443/en/tiffanylisa
Also, look me up on facebook if you have any questions
http://www.facebook.com/...m/niah.das