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Basically, when the first 4G and 4G LTE phones came out, they dropped back to 3G for vouce calls, but used faster 4G networks for internet and data.

Eventually, the telcos rolled out a technology that allowed voice calls to be made on 4G LTE mobile networks, called VoLTE (voice over LTE).

But it only worked on newer 4G/4G LTE phones that supported VoLTE for calls. Older models still dropped back to 3G for voice calls

Sounds to me like your MIL has an older 4G LTE phones that still falls back to 3G for voice calls, instead of making them over the 4G LTE network.

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calhoon2005@aussie.zone ⁨1⁩ ⁨month⁩ ago
That is very clear. Thanks

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just_kitten@aussie.zone ⁨1⁩ ⁨month⁩ ago
Ah fuck. TIL. I figured “my phone does LTE! It’ll be fine” but now I’m worried. Ffs, I just want to get the most out of my phone I paid good coin for 7 years ago, I even went to the extent of lineage onto it to extend its life - hate this constant need to upgrade

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