There are several possibilities for SMS calling service.

The following will be described according to the assumption that A sends SMS to B and B's customers set SMS calls to C ... Customers who have the right to set SMS forwarding (namely Customer B): all mobile customers; Transferable number (namely customer C): all customers of China Mobile; Which short messages can be successfully transferred (that is, the restrictions on customer A): Only the point-to-point short messages sent by mobile customers can be successfully transferred.

Further explanation: when SMS call forwarding is limited to the point-to-point SMS sent by mobile client A to mobile client B, B can set the call forwarding to China mobile client C; The transfer of Monternet short messages and internet short messages will not be opened for the time being. Due to technical reasons, it is temporarily impossible to realize SMS call transfer for mobile customers from other provinces (that is, customer A is a customer from other provinces).

When setting the call forwarding number, the customer applying for SMS call forwarding must be a customer of China Mobile Network (not limited to this province).

Extended data

Provide customers with SMS forwarding function similar to voice call forwarding. Customers can use this service as long as they apply to open the SMS forwarding function and set the forwarding number as required. After setting SMS forwarding, the mobile phone will no longer receive peer-to-peer SMS messages from other mobile phone numbers, but directly forward them to the mobile phone calling the target number.

Sometimes when the mobile phone is in the basement or on the floor of a high-rise building, it will "leave" the coverage area because it can't find the network. After the mobile phone leaves the coverage area, it is impossible to make or receive calls. At the same time, at this time, the mobile phone will still desperately search for signals, resulting in excessive battery consumption. At this time, use SMS to ensure that the incoming call will not be lost.

Baidu Encyclopedia-Call Transfer

Baidu Encyclopedia-SMS Call