Sprint LTE phones arriving in the second half of 2012, likely in Q3

Sprint was the first to the 4G race with its WiMAX network, but while others adopted LTE, the Now Network decided to switch technologies and is now actually behind the curve. The first Sprint LTE phones however are on track to arrival in the second half of 2012, with all likelihood that they will hit shelves in the third quarter of next year, according to Sprint CFO Joseph Euteneuer. Interestingly, this means that the plan is for "a number of different models."
The carrier is committed to supporting WiMAX until 2015, but it’s clear that LTE is the future and the new technology will be aggressively rolled out, so that the transition for most users will happen much earlier.
source: Joe Euteneuer via FierceWireless