I'm going to buy an Iphone 4s tomorrow and wanted to know if it's possible to unlock thee iphone on ios 5.0.1 for tmobile?

 

The only way to unlock an iphone 4 on 5.0.1 is if you have the older baseband. Not 100% if that applies to the 4S.

 

With this you can if you have an older baseband as required http://applenberry.com/store/gevey-sim/gevey-ultra

This will be a better solution when it comes out in a few weeks http://applenberry.com/store/gevey-sim/gevey-ultra-1

I have used the Gevey and it works fine.

This one I haven't heard of but claims it works http://www.store4iphone.com/product/...t-t-iphone-4s/

 

that'll unlock a iphone 4s?

 

Yes but please look to make sure you have the valid basebands, The gevey is the one I know works for sure, my cousin and his dad each have one on T-mobile.

the gevey ultra S isn't out yet but states it will

The other, I have no idea for sure, but it states it does.

 

why not just buy a Factory unlock iphone 4s from apple?