I use last MIUI V8 beta. I flashed last night over the first (last week) V8 beta. The volume when in a conversation is to low. I also test earpiece in the CIT diagnostic app. With first beta calling works perfectly. Now it's almost impossible to hear what other people says to me, even in quiet places. I need to use speaker but it's not good for street or something. Miui v8 it's soo good, i don't want to downgrade to last V7 beta. I hope you will release a patch verry soon. I need to use my phone. For other details about that problem i will cooperate to be resolved in shortest time possible. Thanks for all, great xiaomi.eu team. Sorry for my bad English.