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How many carriers require VoLTE for voice now? I keep getting nastygrams from my carrier telling me to upgrade my old non-VoLTE-capable phone or I'll lose voice
by myself248 4y ago
How many carriers require VoLTE for voice now? I keep getting nastygrams from my carrier telling me to upgrade my old non-VoLTE-capable phone or I'll lose voice 'any day now', with a drop-dead date that's moved several times.
- kube-system 4y agoAre you outside of the US? T-Mobile, ATT, and Verizon have all shut down 3G networks as of 2022.
- sangnoir 4y agoLTE is 4G, as is VoLTE. US carriers haven't shutdown 4G networks AFAIK.
- kube-system 4y agoI understand, the person above says they have a non-VoLTE phone, which will make voice calls on 2G or 3G.
- dilyevsky 4y agothere’s something called CSFB (circuit switch fallback) which allows you to make old school voice calls/sms without using IMS (volte) over 4g network
- BuildTheRobots 4y agoMy understanding is that CSFB works by signalling the LTE/4G handset to handover to the 3G or 2G network and continue the call setup on there. If carriers have shut down their 2G and 3G networks then there is nothing providing Circuit Switched services to fall back to.
- dilyevsky 4y agoYes it’s def how it worked on the “backend” but i don’t remember what it did on the channel layer tbh. Maybe there’s a compatibility mode in enodeb. Also all three major providers have def shutdown their 2g/3g equipment as of last year