How to open the SMS sent by blocked contacts in oppo r7plus?

Dialing, harassment interception, information three points, you can see the intercepted information.

Setting methods of harassment interception: dialing, three points, harassment interception, setting, turning on harassment interception switch, adding blacklist, setting up intelligent interception of spam, etc.

Use Do Not Disturb mode:

Enter the setting, do not disturb mode, turn on the do not disturb mode, turn on the incoming call and information switch, and set that they are only allowed to contact as contacts, and strangers' calls and information are muted.

If you want to completely block all strange calls, so that they have no interface for incoming calls and information reminders, you can only blacklist strange numbers or download other software with anti-harassment function.