Follow the 3R's- if a restart does not solve your problem proceed:
1. restart, ie power off/on,
2. reset http://support.apple.com/kb/HT1430,
3. restore from backup, restore as new device. http://support.apple.com/kb/HT1414
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📱 Learn more about your iPhone
Follow the 3R's- if a restart does not solve your problem proceed:
1. restart, ie power off/on,
2. reset http://support.apple.com/kb/HT1430,
3. restore from backup, restore as new device. http://support.apple.com/kb/HT1414
Follow the 3R's- if a restart does not solve your problem proceed:
1. restart, ie power off/on,
2. reset http://support.apple.com/kb/HT1430,
3. restore from backup, restore as new device. http://support.apple.com/kb/HT1414
Turn up the volume
While you're on a call, adjust the volume with the volume buttons. Make sure that you can see the volume indicator on the screen when you press the volume buttons.
If you can't hear a person on a call or voicemail or if the sound isn't clear on your iPhone
​iPhone SE low call volume