how was it? does it make any change?
It didn't Make any difference.
its all about Receiver problem. I had experienced the same problem. I visited the Oneplus service center,they resolved the problem by cleaning the dust in the earpiece . They levied a charge of 450/-rs
did you experience a major difference in volume of call after cleaning it?
yes a lot
thanks for sharing, have you face this issue after software update ?
No , The problem is dust went into the earpiece so it gradually decreased the sound as it forms a layer above the earpiece inside.
Shot on OnePlus - Juin, 2019
by Gaston NP, 2019-06-17