PRL 25013/51095 Changes in General Topics Posted March 30, 2013 The only thing the iPhone doesn't support is SVDO & SVLTE. Otherwise it supports CDMA/EVDO 800 & 1900, & LTE 1900, plus CDMA/EVDO on 850, and is a world roaming capable phone. I believe it's 800 SMR support was only certified with the FCC for CDMA 1X, not LTE. As far as I understand its radio, there is no hardware limitation for this as it can transmit/receive any of the supported technologies on any of the supported bands, but it would require a software update to enable. So YMMV, but after iDEN shuts down next year we may see Apple enable LTE on SMR or they may not. No one knows, but there's a much higher chance than most manufacturers given Apple's track record of updating older devices.