One SIM card personal, the other work, this is the main division and it is important. On all my previous phones ringtones on different SIM can be put separately. The video was sent but: (reason: 552 5.3.4 Message size exceeds fixed limit.). I send link to. There were 5 apps to launch, telegram, amaz...

1-why can't I make separate ringtones for each SIM card? Is there any way to fix this? 2 - when notifications for applications appear on its icon only a red circle, in fact there should be a number with the number of notifications. 3 - all downloaded apps don't automatically start with phone startup...

Is there a difference in the firmware between A20 and a20pro and what is the latest firmware in a20pro, where I can download it?