What are the types of call forwarding services?

There are four types of call forwarding for mobile phone users: unconditional call forwarding, unanswered call forwarding, busy call forwarding and unreachable call forwarding:

1. Unconditional call forwarding: All incoming calls are transferred, even if the mobile phone is turned on normally, there will be no incoming calls;

2. No answer transfer: When the phone is not answered, all calls to you are transferred to the phone number you set;

3. Transfer in case of busy: When the mobile phone calls, all calls to you are transferred to the phone number you set;

4. Call forwarding that can't be connected: When the phone is turned off or there is no signal, all calls to you will be forwarded to the phone number you set.