Can't install older firmware

Hi everyone,

I have two computers, exactly the same (same software and hardware) - see attached picture . The only difference is the Vodafone firmware version:

  • 001.001_000 which works (even on two other computers I have
  • 001.001_002: with this firmware I can’t connect to 4G/3G/LTE

I am thinking that since it’s the only difference, if I can install the older version of the firmware, it should work, since it’s an exact replica.

But when I try to install this firmware: 9999999_9904930_SWI9X30C_02.24.03.00_00_VODAFONE_001.001_000

I get the following message. Can anyone help me install this older firmware?

FDT version: 1.0.1702.1
Awaiting adapter …
Setting images preference …
Resetting …
Awaiting download port …
Downloading images …
Writing image /
Flashing image -
Writing image
Flashing image |
Writing image /
Flashing image -
Enabling selective suspend …
Enabling selective suspend …
Firmware download failed.
Primary error code: 77 - Failed in streaming download stage.
Secondary error code: 68 - Received incorrect response.
Device error code: 0x0 - Unknown device error code.

Preexisting images information:
Current:
Firmware:
ImageId: 001.001_002
BuildId: 02.24.03.00_VODAFONE
Configuration:
ImageId: 001.001_002
BuildId: 02.24.03.00_VODAFONE
Final images information:
Current:
Firmware:
ImageId:
BuildId:
Configuration:
ImageId:
BuildId:

OEM PRI:

IMEI:

Total time elapsed: 16131 ms.

Time to switch to boot mode: 14851 ms.

Images downloaded:
Image ID: 001.001_000
Build ID: 02.24.03.00_VODAFONE
failed

Time to reset to application mode: -1 ms.

Press Enter to continue …

PRI release note says there is update on the new flash id:

what is the return of the followings on the module with 001.001_002

at!entercnd="A710"
ati3
at!impref?
at!bsinfo

at!entercnd=“A710”

OK
ati3

Manufacturer: Sierra Wireless, Incorporated
Model: MC7455
Revision: SWI9X30C_02.24.03.00 r6978 CARMD-EV-FRMWR2 2017/03/02 13:36:45
MEID: 35457251218974
IMEI: 354572512189747
IMEI SV: 9
FSN: LQ238522430110
+GCAP: +CGSM

OK
at!impref?

!IMPREF:
preferred fw version: 02.24.03.00
preferred carrier name: VODAFONE
preferred config name: VODAFONE_001.001_000
current fw version: 02.24.03.00
current carrier name: VODAFONE
current config name: VODAFONE_001.001_002

config name mismatch

OK
at!bsinfo

Product: MC7455
Revision: 40
Main: MDM9230 (002)
Radio: WTR3925
Power: PMD9635 (001)
Flash: MT29F4G08ABBFA3W 512MB x8 (44/0/0) (2048 blocks of 64 pages/block 4096B page size)

OK

“MT29F4G08ABBFA3W” is new flash, you cannot apply the old FW/PRI

Ok thank you for the feedback.

Why isn’t it working with this new configuration?

I don’t know, can be some setting (like APN) are different

Have you tried AT!RMARESET to restore the problematic module?

Is the APN changing when firmware is upgraded? Isn’t it supposed to be independ?

As said, everything is exactly the same, except for the firmware version.

I have tried to restore now, but same result.

have you compared “AT+CGDCONT?”
have you compared “AT!GSTATUS?”
You can check whether the received signal is good in the RSRP value :

I suspect your main antenna is not receving signal well:

I will try that, but I juste realized another difference, do you think it might explain it?

image.png

.
and on the one with the issue :

image.png

no idea
have you swapped the module among the two PCs?

No I haven’t done that, I am a little scared to mess up the functionning one.

then you need to compare the AT command settings