Lately when i use my cellphone, I can't hear the caller's voice, the sound were all broken apart. For example when the person say "Hello world", it will be like " He.....o ........d" The other person can clearly hear my voice but i couldn't hear theirs. I tried to use another cellphone but the same thing happened.

I am currently using T-mobile provider,
This issue only happens when i use it around my house area.... I am so confused, would it be because the wifi router or something with strong signal interrupted my calls?


Any help will be appreciated.
Thank you