How to blacklist China Telecom Tianyi mobile phone?

2. After entering the dialing page, click the function key on the far left of the mobile phone.

3. Select "Harassment Interception"

4. Click the Settings button in the upper right corner.

5. Click the switch behind "Turn on harassment interception" to turn on interception function.

6. Select "Interception Mode"

7. Select "Stop Strangers"

8. After the setting is completed, you can intercept calls and text messages from strangers and blacklisted numbers.