Downgrade - how to

[iamauti]

Hello,

In my phone apears that:

00:18:52| DBID: db2020
00:18:52| OPT CID: 51
00:18:52| EROM CID: 51
00:18:52| EROM color: red
00:18:52| IMEI: 35220601xxxxxx
00:18:52| Phone: K790
00:18:52| Operator: AMERICA_2
00:18:52| CDA: CDA102535/20 R6A
00:18:52| Firmware: R1EG001
00:18:52| EROM: R3A016

But the EROM is not listed.
How I can update to some firmware capable? May I?
Or may I change to another Firmware the same CID? This case Firmware it's R1EG001, changes to R1GB001, are there any problem?

Tks

Thanks

[kamil1]

If you can downgrade you must go to service and use box

[wisky_2004]

you cannot downgrade db2020 erom under any instance

[reading]

You can't do that!
I never hear that anybody can downgrade db2010 erom.

[kamil1]

sorry. It's true you can't downgrade because you have OTP cid 51. You can downgrade only Erom cid but no older than OTP cid. it's possible!!

[iamauti]

What changes would be (in red words)

00:18:52| DBID: db2020
00:18:52| OPT CID: 51
00:18:52| EROM CID: 51
00:18:52| EROM color: red
00:18:52| IMEI: 35220601xxxxxx
00:18:52| Phone: K790
00:18:52| Operator: AMERICA_2
00:18:52| CDA: CDA102535/20 R6A
00:18:52| Firmware: R1EG001
00:18:52| EROM: R3A016

Because de CID it's the same (CID51) what is different is Firmware and EROM.
Can I do it?

Tks

[iamauti]

Anybody can help me?

[wisky_2004]

What changes would be (in red words)

00:18:52| DBID: db2020
00:18:52| OPT CID: 51
00:18:52| EROM CID: 51

Tks

man what didn't you understand???
1. DB2020 phones EROM cant be downgraded
2. if EROM CID downgrade is possible (only db 2010) and it can be downgraded no less than the OTP CID. in your case no less then CID 51 so... IMPOSSIBLE
============ CASE CLOSED ============

[paladinzluka]

2010 erom also can't be downgraded

[ivbuiliev]

@iamauti. Your EROM is listed R3A016. Don't mess with it. You can upgrade or downgrade your CID51 main FW freely. Of course with CID51 flashes only.