If you haven't heard by now, the Nexus 4 doesn't have LTE. It probably won't ever have it, either, based on what Andy Rubin told The Verge regarding the latest Nexus handset's network situation in an interview.
He talks a lot about "tactics" and "user experience" (read: battery life), but it really boils down to one issue: money. The fact that the unlocked 8GB version of the Nexus 4 is just $300 is absolutely crazy. Looking at the hardware, this is easily a $600 phone. Having used an Optimus G (the platform this phone is based on), I already know this is a truly premium device.