Does T-mobile support the iphone 4?

I'm new to this whole iphone thing and was thinking about buying the iphone 4 off of someone, my current phone company is t-mobile will i still work?

Yes, but you will only get a Edge Data Connection, unless you live a 1900 band reframed area

3 years OLD already
OVERPRICED http://www.itproportal.com/2012/09/06/8gb-iphone-4s-version-be-introduced-iphone-5-launch/

ALL IPHONES lack BLUETOOTH MEDIA TRANSFER, So NO SHARING,
NO MICROSD expansion
Fixed-in battery, so no spare & NO SOFT RESET
The iPhone 4 only has a few months as it will be discontinued on release of the IP5S
support or sales are LAST 3 iPhones