How to update the firmware of Samsung Galaxy S Duos GT -D7562?

Question

linux

I want to update the firmware of the samsung galaxy s duos gt -s7562, I was tormented by the one that is from the official one, there are a lot of all sorts of unnecessary applications that are built-in. How to update the firmware?
Is there any alternative firmware for my device at all? I don't care that there are two SIM cards, I still want to change the firmware, even if one SIM card slot does not work.
Is it dangerous to demolish the factory firmware for someone who is a confident linux user? How can Android be built from source?

Answer 1

1) Keis does not update?
2) I don’t know about alternative and assembled on the knee.
3) Removed unnecessary applications via adb. I transferred the necessary ones to a flash drive and installed a link to them. True, not everyone has done so wonderfully. But it doesn't matter. In this case, the configuration can be easily restored when reinstalling the profile.

Answer 2

w3bsit3-dns.com

Answer 3

It’s better to put the official one, I didn’t put official ones on my phones - there were glitches in the process of work (either the phone didn’t ring, then the screen didn’t respond) + the battery ran out very quickly. Now I put off the firmware, though now everything is in English, but the firmware itself is much more stable and the battery lives 60% better. A Galaxy SII HD phone and a second Galaxy Note 2 phone.