skip029 , via OnePlus 7 Pro , Dec 13, 2019 : No issues before the update 10.0.3, now everyone is saying whenver they speak to me they can hear themselves echoing. I have tried resetting mobile networks, turning VoLTE off, toggling airplane and mobile data off, 2/3G only off/on, lowered volume during call. Nothing works so far. Contacted OnePlus Support. He (Michael) suggested I shut down the phone completely, hold Volume Down + Power, Select English, clear Cache, clear cache and restart. (Do not erase everything, just cache). Seems to be working again with no echo. But 15 min later it came back. Last resort is a HARD RESET (factory). Anyone else have same issue or a fix?? Edit: Just found out if I put the call on SPEAKER PHONE, the echo stops for the other person.