Plausible reasons have already been suggested somewhere else[1], in summary chipset makers are creating dual purpose chips with dies that support LTE, but have

Plausible reasons have already been suggested somewhere else[1], in summary chipset makers are creating dual purpose chips with dies that support LTE, but have fuses burnt and a cheaper price tag to restrict their usage. Even if you could reverse the fuses, there is still a lack of hardware and calibration for it to be possible in the nexus 4. [1] http://www.reddit.com/r/technology/comments/13cods/nexus_4_teardown_reveals_lte_chip/c72u8xm http://www.reddit.com/r/technology/comments/13cods/nexus_4_t...