iPhone 7 call volume is too low
Hi Friends.
I have an iPhone 7 which is 15 months old. From past few days, the call volume has gone too low. I can hardly hear the other person on-line. Almost zero volume when I am outside. Right now managing by turning on speaker. Is this a common problem with iPhone-7? Is there any solution? Please help.
iPhone 7, iOS 10.2.1