How to judge whether your iPhone is blacked out?

Do you want to know if your iPhone has been hacked by friends or others? The following methods may help you reveal the answer.

make a telephone call

Try to call each other! If the other party's mobile phone is not turned off, but it says "Hello, the number you dialed is busy, please redial later", it may be blacked out. If the other party is turned off, it will be "Hello, the number you dialed is turned off".

send a text message

Send a message to your friends and see if they can receive it. If the news is as heavy as a stone, it may also be hacked.

FaceTime

Try to initiate a FaceTime video call. If the other party's mobile phone does not respond, it may also be a signal that it has been blacked out.