Please help with MIUI call quality

[nuwanmw1988]

Hello..I'm using MIUI global beta ROM 7.5.11 and the one in the other side of the phone call has difficulty in hearing​ me property.. I had this issue since last two or three bata ROMs. It appears that the issue is more when I'm using 2g signal for the audio calls rather than with 3g. Does anyone have the same issue? Please help me fixing this.
Thank you.

 

[sasaenator]

I had a similar issue,but I am not sure was it because of 2g-3g difference or something else.People also complained they cannot hear me well during video calls (viber,whatsapp) over WiFi. Also, I had a problem hearing other people,depending on a ROM,and I changed a lot of them,a couple of MIUI's and almost every 7.1.2 that I could find here.One other bug that I have (had) is the bluetooth streaming which also varies from ROM to ROM.Yesterday I installed latest [ROM][OFFICIAL][OMS][7.1.2] Slim7 [WEEKLIES] (cancro),audio is great in both directions,bluetooth resolved after reboot.There are 2 SlimROMs I only tried this one.Hope this helps!