The Xiaomi smartphone comes with a feature to record phone calls or conversations, which is disabled by default, but can be enabled for all calls or selected numbers.

Note: Due to restrictions and data protection regulations, the function may not be guaranteed.

Android 10 | MIUI 12.0
Step 1:  Open the  Phone app
Step 2:  Open the  Settings
Step 3:  Tap on  Call recording
Step 4:  Enable or disable  Record calls automatically
Step 5:  Choose  All numbers  or  Selected numbers
  1. Open the Phone app
  2. Open the Settings
  3. Tap on Call recording
  4. Enable or disable Record calls automatically
  5. Choose All numbers or Selected numbers

Xiaomi Instructions