Chosen Solution
How can I increase the volume on iphone 5 phone receiver? I replaced the battery and calibrated, works well, but receiver volume is too low. I explored settings/accessibility, turned on and off hearing aid mode, mono audio, phone noise cancellation. I’m able to improve it somewhat, but it is tricky to find the right combination,
You can’t enchance it anymore. You have done everything you could,replace the “ear” piece or try to stay with it and check your hearing in the doctor ,maybe you have some kind of nerve problem .
