T-Mobile subscribers are still getting used to having access to the iPhone, and those with existing AT&T unlocked iPhone 5 received a carrier update to add LTE support for T-Mobile's frequency. Unfortunately, that's not all it did.
Turns out that update may have also limited the bandwidth available to T-Mobile customers using one of those unlocked handsets, leaving them with something of a gimped LTE service. Bummer, right?
Well, remember the guy that worked out how jailbroken iPhone users could enable T-Mobile's LTE before the aforementioned carrier update? That same clever man has also worked out how to give T-Mobile the bandwidth you'd expect from one of the hottest LTE handsets on the market. And you don't even need to be jailbroken for it to work...