Ok, first things first. T-Mobile reps, you need stop deleting my posts. I am not doing anything illegal nor am I violating any rules of any kind of your's. The iPhone 5 (all models) have passed the FCC with LTE approval and you guys have an LTE network. This is NOT illegal or in violation of anything. I have taken a snapshot of this post and will take this to higher authority if you continue this.
Now on to what I was so rudely interrupted on. This is an informative post on how to enable LTE on your iPhone 5 GSM model (A1428). Since we won't see LTE on our devices till next month and a lot fo you are anxious to get it, I have created a custom carrier bundle that you can inject into your iPhone so it will work with 4G LTE. I have had numerous people test it with great success, in fact you all flood my inbox. lol! I will provide a snapshot of unclespoon's LTE results below from yesterday evening. If you really want LTE send me a PM with your email address and I will send you the instructions on how to do this. Thanks
NOTE: You must be jailbroken to do this.