Cell phones do wideband codec over lte. Landlines terminate to 64k ulaw or alaw depending on country. A wideband cellphone to 64k landline is very clear for v

Cell phones do wideband codec over lte. Landlines terminate to 64k ulaw or alaw depending on country. A wideband cellphone to 64k landline is very clear for voice and has no jitter or packet loss so it's not fatiguing to listen to.