No LTE on unlocked iPhone 5?

I have the latest carrier update, I have iOS 7 developer beta. I have the enable LTE option, but nothing happens. Only 4G. On cellular data settings I have fast.t-mobile.com written, but the LTE section is fully blank. I tried writing fast.t-mobile.com there, nothing happened. How can I enable LTE?

Is your device's UDID registered? A lot of people on iOS 7 have been reporting network issues like this when they haven't registered their UDID on a site like http://www.instantudid.com/.It's $5, and I haven't had any issues connecting to LTE on my iPhone 5.

Make sure that your ios 7 is registered on a developers account, you need to reset it and check the LTE status. If still the same, contact your carrier about it.

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