Tmobile

Still can't.

 

It not possible, and won't ever be for the 4S, though EDGE works just fine.

 

My understanding is that T-Mobile USA uses a different frequency of 3G which is not supported by current iPhones so its not going to happen unless Apple release a model that is compatible. Considering that there is no news of T-Mobile becoming an official Apple iPhone partner you may have a long wait.

 

If it's too slow then get a different phone. There's no way to fix it as it is a hardware issue.

 

I don't think the iPhone will ever have 3g on tmobiles network.

 

As long as T Mobile buyout seems like it is going to happen, it doesn't make a ton of sense for Apple to invest in radios for 3G on T Mobile.

If that doesn't happen, then I could see Apple making a T Mobile 3G device, while the market isn't huge, it also likely isn't that expensive if Apple puts in pentaband radios into their device, then Apple doesn't have to make T Mobile only devices.

 

I thought the new chip supports T-Mobile's 3G network, but it's just not enabled.