models of Samsung, Motorola, and Pixel phones. carriers and should have VoLTE for all of them. There still are some 'unlocked' phones that actually are compatible with all major U.S. All that tells you is that it's not locked to one carrier. take down all networks below LTE (3G/2G/CDMA), VoLTE will become an absolute must for phone calls.ĭoes this change mean that all unlocked devices moving forward will no longer be considered 'unlocked', since the phone must use the same carrier it was purchased with, otherwise VoLTE won't work and therefore no service?Īt this point, 'SIM-unlocked' has nothing to do with whether a phone is VoLTE-compatible with a particular carrier or not.
Therefore, without working VoLTE, phone calls won't work at all. With no 3G and 2G networks (AT&T already shut down their 2G network back in 2017) around, phone calls have to go through LTE, and VoLTE is the only available route for that. Any specific reason why VoLTE is now becoming the new requirement with the discontinuation of the 3G networks?
