Xiaomi introduced the Redmi 6 Pro as a stock Android-running Mi A2 Lite in July, alongside the Xiaomi Mi A2. The phone is on the Android One program and its time for an upgrade to Pie has come. The company reached out to Mi A2 Lite owners, willing to participate in the Beta program.
You have to install the QQ app that is used for official communication for bugs and features. Of course, you have to speak English and know the basics of porting ROMs. There’s also the requirement of being active on the MIUI forum and willing to get into discussions with other members of the program.
This all can be done through the MIUI Global Forum app, available on Google Play. Then you must send your phone's IMEI and complete an online form by the end of the week. Xiaomi will reach out to users the company has selected.
Via (in Chinese)
Android pie update is a lame After the update, my phone speaker is not working. Then my phone does not show incoming call And there are a lot of problems I am in mess :(((
Don't do it! The Android 9 update is very very buggy. Wifi/connectivity gets totally messsed up.
Mi A2 Lite not release pie update, they release Mi A2 pie Update.