Earpiece
1. Check that nothing is covering the microphone:
• If you are using a case, cover or screen protector, remove it and see if it was causing
the issue.
• Check that the protective film that ships with the phone has been removed.
2. While in a call, try using the speakerphone or a wired headset to see if the sound quality
improves. If it doesn’t, the issue is probably network signal strength instead of hardware.
3. Turn your phone off and then on again.
Press and hold the Power button, then touch Power off. Then turn it on to establish a new
connection with the network.
4. Use safe mode to see if apps you installed are causing the issue and uninstall as needed.
5. Check if a software update is available for your phone.
6. Reset the phone.
Bluetooth device
Check battery level of Bluetooth device and phone, and charge if necessary. Bluetooth devices
may disconnect or create noise when the phone or Bluetooth battery are low.
Can't make/receive calls
Try these troubleshooting steps.
Fix a problem : Call and SIM issues 186
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