Hello,

Does anyone here use Yes 4G SIM in Oppo R9s (model CPH1607; latest firmware A.25 190425)? Are you able to use VoLTE?

If VoLTE is not enabled, does it affect SMS send/receive ability? I can only use internet (4G LTE data connection), but no call (as there's no VoLTE), and no SMS too.

Any feedback is appreciated.

Regards.