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GSM/UMTS and CDMA have different tolerances, but my guess is T-Mo is willing to accept/deal with out-of-sync situations with LTE more creatively than Vz/Sprint/T. Sprint handled things somewhat similarly with the original (Samsung-built) Airave and only required a GPS lock at boot. Eventually...

The Network Extender and other femtocells, as network elements, are where the time synchronization issues come into play. Your user equipment is fine — it wasn't all that long ago that end-user devices didn't have GPS. (And because GPS signal can be fleeting indoors, I don't know that any UE...

harshness: Authority to operate in a given area (and, if so, which spectrum to broadcast and receive on flows from that), I guess, is probably the most important? But without GPS for time, it wouldn't work. While NTP might be easier as you argue, it can be exponentially less accurate (GPS time...

The GPS actually serves a few different purposes... As a lot of folks here have mentioned, it helps with E911 (through A-GPS particularly if your device doesn't have adequate or any GPS signal of its own). It's also used by the network-side femtocell provisioning software to be certain you're...