What are the recommended practices and procedures for Android OS OTA Updates.
Is it all right to download via mobile data instead of WiFi.
How to get out of bootloops if the procedure screws up.
Preferably answers without the use of root.
Why: My previous phone had never received OTA as it was old, and just the other day my phone, Samsung XCover3 (SM-G388F), got a notification saying it can update to Android Lollipop(5.1.1) from Kitkat (4.4.4).
P.s. are there any known bugs for this update on my phone(phone model as started above)