What do you mean the phone was hacked?

There are two ways to become a blacklist of mobile phones:

1, mass spam messages.

2. The same ID card has been processed.

More than 3 numbers, and they are all in arrears, but they have not paid the fee to cancel the account.

The solution of blacklist:

In the first case, write down a guarantee that you will not send spam. If you are detected to send spam messages again, take a copy of your ID card at your own risk.

In the second case, you can pay the liquidation fee and cancel the account.

Extended data

China Unicom has done a great thing for users:

Individual users of Unicom can check whether their numbers are marked for free, without applying to the marking service enterprises one by one.

The specific steps are as follows: log in to the code number service platform of China Information and Communication Research Institute, select "Clear Wrong Number" and submit relevant information, then you can query the operation code number and automatically cancel the wrong number.