Haven't actually seen the signal degradation issues you speak of, probably offset by being able to use a lower band than GSM or HSPA for my carrier. Carriers h

Haven't actually seen the signal degradation issues you speak of, probably offset by being able to use a lower band than GSM or HSPA for my carrier. Carriers have made it a policy to not whitelist imported devices for voLTE. IMEI needs to be whitelisted at carrier AND carrier file installed in phone needs to have support turned on. Either thing missing, no voLTE for you. EDIT: Forgot to mention, non-voLTE still signals with LTE for incoming calls and SMS, it'll handover to HSPA/CDMA/GSM within about 2 seconds of the signal coming in. Unfortunately I don't have specifics of this process.