3 ms·Modern cellphone networks support wideband codecs, e.g. AMR-WB.by Sesse__ 2y agoModern cellphone networks support wideband codecs, e.g. AMR-WB.ale42 2y agoIs that working across networks, though?acuozzo 2y agoI think it requires SDP negotiation between your UE, your EPC, their EPC, and their UE. Assuming all parties agree on the use of AMR-WB, then you're good-to-go.