Samsung s7 can't vibrate in vibration mode. The wechat message didn't vibrate.

It is suggested to take the following steps for investigation and handling:

1. Try to adjust the vibration intensity of the incoming call to an appropriate volume.

2. Standby-Phone-Menu-Call Settings-Call Prompt-Answer Vibration is checked.

3. Try to turn off the phone and restart it.

4. Check whether incompatibility may be caused by installing third-party software.

5. If the problem still exists, it is recommended that you back up data (such as contacts, text messages and photos) and restore factory settings (Settings-Reset-Restore factory settings).

6. If the problem still exists after the above operations, please send your mobile phone, purchase invoice and maintenance card to Samsung Service Center for professional inspection.