Apple sends messages to each other in the circle.

The main reason lies in the choice of Iphone signal baseband and hardware loss.

Users who use the Iphone often encounter the problem of poor signal, often only one or two frames of signal, or can't receive the SMS verification code, or the phone can't come in, or brush a web page around. In fact, the main reason for this problem lies in the choice of Iphone signal baseband and hardware loss.