“The Circuit Switched Fallback, or CSFB, is a Service Handover Procedure, of LTE protocol, devised to deliver VOICE and SMS to LTE devices with a circuit switch network (3G or 2G).”
4G does not work at all?
“The Circuit Switched Fallback, or CSFB, is a Service Handover Procedure, of LTE protocol, devised to deliver VOICE and SMS to LTE devices with a circuit switch network (3G or 2G).”
4G does not work at all?