All the contacts before Android phones have been deleted. Why does she send text messages with different phone numbers? The message was blocked.

Unilateral deletion does not affect the function of receiving short messages.

Deleting someone else's number just means that someone else's number will not be in your contact. Of course, someone else can still send you a message. Delete is not hacked. Even if it is hacked, I can still send you a message, but it will be blocked in the blacklist. If you delete someone else's number, they can still call you and send you messages.

Or maybe you saved his number in your phone and card, and then your phone was set to display only the phone number or the number in the card, and only one of them was deleted. If you try to set the phone number or card number in the phone book and delete it again, it should be all right, or if it doesn't work, copy your phone book and restore the factory settings.