Where can i connect an unlocked iphone 4s?

If i buy an iphone 4s online at cheap wholesale.com and its unlocked can i connect it to straight talk? Or evrn better to t-moblie?

Yes if it is unlocked, you can connect it to Straight Talk or T-Mobile. I would suggest Straight Talk using the AT&T compatible SIM. Since the iPhone currently supports high speed data on the 850/1900 band of AT&T you will get better data speeds than using it on T-Mobile, which uses the 1700/2100 Mhz band. Using it on T-Mobile on those bands will feel like using a dial up modem.

However, T-Mobile has been refarming their network to use the 1900 Mhz PCS band in some areas (and growing. To see if your area has been converted over, please refer to the source link below.