What is callback

Callback mode is a mode that you use our
system, first you need to initiate a notification
system (we call for an appointment), and then
the system will take the initiative to make a call
to your phone, your phone will ring. You pick up
the phone, hear the concrete operation of the
system prompt voice. According to the voice
prompts, you can perform tasks such as dial
international long-distance, recharge, transfer,
balance inquiries and a series of operations. In
simple terms, the callback is our system call you,
just as you received a phone call from a friend.