No Sound on incoming calls and messages - Huawei G7-L01

Description of the problem: Ringtone cant hear sound when there is incoming calls or messages.
Current Version: MK71.2-cherry-201712180417-NIGHTLY
Reproduction steps: when someone calls i cant hear the phone ring no sound or vibration only screen display caller name and two option forreject and answer… tried to to hard reset but still no sound…
Device: Huawei G7-L01