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Go Back   GSM-Forum > Product Support Sections > Hard/Software Products (official support) > EFT Dongle

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Old 02-09-2020, 11:02   #1 (permalink)
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Error Mar-Lx2 (Mar-L22b)


1-
i got error when trying to downgrade firmware
this is the version before downgrade


2-
i download file from easy-firmware (frp bypass MAR-LX2 9.1.0.241(c636) )..
i follow the procedure flashing without error
but after finish flasing..happen only stuck in erecovery mode..

3-
i download another file (MAR-L22B 9.1.0.316(c636) )
After Flashing 0.reboot.apk then reboot
phone go into system
i turn off and flashing 1.app and got error Cust and stuck at 36%

4-
i try to download full firmware version MAR-L22B 9.1.0.316(c636)
got error at preas.img


5-
after error flashing only shown this in fastboot mode


6-and now only after flash ( FRP BYPASS MAR-L22B 9.1.0.316)c636)
0.reboot.app only can go boot into inside system.

need Team Or Any Expert Help Please..
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Old 02-10-2020, 03:58   #2 (permalink)
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Need help please..!!
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Old 02-10-2020, 04:06   #3 (permalink)
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Tuve un problema parecido ,logré solucionarlo háblame al mp para ver si lo solucionamos
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Old 02-10-2020, 05:41   #4 (permalink)
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i have succesfully recover back by full firmware..now i retry downgrade to bypass frp again..
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Old 02-10-2020, 06:22   #5 (permalink)
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i have succefully make my phone alive and downgrade succefully to bypass frp..
current version is 9.1.0.316

1-
need update firmware to MAR-L22B 9.1.0.316

2-
download file to do it follow intryction..

3-
success

ThankYou Team..
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Old 02-14-2020, 08:24   #6 (permalink)
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i have this same problem like you how you restore to stock rom ?
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Old 02-14-2020, 08:44   #7 (permalink)
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Quote:
Originally Posted by baddog View Post
i have this same problem like you how you restore to stock rom ?




1-FIRST YOU NEED MAKE YOUR PHONE ALIVE FIRST!!
2-If your verison is MAR-L21A(c431) Download full firmware MAR-L21A 9.1.0.317(c431) (HOW TO FLASH)
3-after extract full firmware and check inside folder dload, there got 3 zip..please extract all and follow the steps to flash
4-Flash
1.base_ptable.app(no reboot)
2.cust_ptable.app(no reboot)
3.preload_ptable.app(no reboot)
4.Cust.update.app(no reboot)
5.preload.update.app(no reboot)
6.base.update.app(Please Tick Reboot in Last)
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Old 02-14-2020, 09:54   #8 (permalink)
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yes but i don't have idea what firmware been early
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Old 02-14-2020, 10:03   #9 (permalink)
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Quote:
Originally Posted by kinryo View Post
1-FIRST YOU NEED MAKE YOUR PHONE ALIVE FIRST!!
2-If your verison is MAR-L21A(c431) Download full firmware MAR-L21A 9.1.0.317(c431) (HOW TO FLASH)
3-after extract full firmware and check inside folder dload, there got 3 zip..please extract all and follow the steps to flash
4-Flash
1.base_ptable.app(no reboot)
2.cust_ptable.app(no reboot)
3.preload_ptable.app(no reboot)
4.Cust.update.app(no reboot)
5.preload.update.app(no reboot)
6.base.update.app(Please Tick Reboot in Last)

excellent bro, successfully recovered the phone now whats procedure for downgrade ?
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Old 02-14-2020, 10:14   #10 (permalink)
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when i try flash like you write i have like that
Checking fastboot device.....OK
Reading info.....OK
Device Firmware: :Error: /preas/xxx not found in /product/hw_oem/MAR-L22B/par
Checking needed files.....Not found
Writing rescue image.....Failed: Extraction failed
Operation {Flash APP Firmware} ID: D5FDE1B3F57A0ACF
Elapsed time 00:12 -- Version 1.9.2
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Old 02-14-2020, 10:21   #11 (permalink)
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my software region is c636 is it downgrade possible
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Old 02-14-2020, 11:28   #12 (permalink)
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Just write firmware 9.1.0.316 mar-l22b downgrade frp firmware..follow full.procedure..now will seccuess
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Old 02-14-2020, 11:32   #13 (permalink)
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Quote:
Originally Posted by baddog View Post
when i try flash like you write i have like that
Checking fastboot device.....OK
Reading info.....OK
Device Firmware: :Error: /preas/xxx not found in /product/hw_oem/MAR-L22B/par
Checking needed files.....Not found
Writing rescue image.....Failed: Extraction failed
Operation {Flash APP Firmware} ID: D5FDE1B3F57A0ACF
Elapsed time 00:12 -- Version 1.9.2
You need to find full firmware MAR-L22B ..try go to erecovery mode download latest firmware and update,connect wifi..see the info inside..u have to see whats is you country mode ,mayb c636
Or maybe others..sure this can be recovery back..i just tested
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Old 02-14-2020, 11:33   #14 (permalink)
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Quote:
Originally Posted by Mr.3. View Post
my software region is c636 is it downgrade possible
Yes..is possible..
Whats is your firmware version now??if lower than version 10..try Download frp bypass downgrade firmware for 9.1.0.316(c636) and follow all the steps
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Old 02-14-2020, 11:43   #15 (permalink)
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And make sure you phone firmware version is same as 9.1.0.316(c636)

You can do.upgrade first is the version is not this
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