MC7455 / EM7565 vs. Quectel EP06 IMEI Change

Sierra Wireless AirPrime Modem Card Topics
jasontang401
Posts: 2
Joined: Mon Sep 21, 2020 10:34 am
Has thanked: 0
Been thanked: 0

Re: MC7455 / EM7565 vs. Quectel EP06 IMEI Change

Post by jasontang401 » Mon Sep 21, 2020 10:51 am

=================================================================
AT!OPENLOCK?
The encryption key must be calculated based on the above challenge response, then entered via:
AT!OPENLOCK="xxxxxxxxxxxx"
AT!NVIMEIUNLOCK
==================================================================
Anybody knows how to calculate the encryption key-xxxxxxxxxxxxxxx? thanks.

jasontang401
Posts: 2
Joined: Mon Sep 21, 2020 10:34 am
Has thanked: 0
Been thanked: 0

Re: MC7455 / EM7565 vs. Quectel EP06 IMEI Change

Post by jasontang401 » Mon Sep 21, 2020 10:55 am

BillA wrote:
Mon Jan 13, 2020 11:27 pm
Couldn't find any reference to imei repair for Sierra modems in those links.
However, if it gets wiped out during a bad flashing process, then it could be REPAIRED with the SAME IMEI as printed on the modem's label. I've read that a failed flash, or the proper test command can potentially wipe the NVM, or via a challenge/response:
AT!OPENLOCK?
The encryption key must be calculated based on the above challenge response, then entered via:
AT!OPENLOCK="xxxxxxxxxxxx"
AT!NVIMEIUNLOCK

For example, if the imei repair is 12345678901234+<check-digit + 0 padding>
The check-digit can be calculated using this LUHN calculator > https://planetcalc.com/2464/
So the repair command in this example with the calculated check digit 7 + 0 padding would be:
AT!NVENCRYPTIMEI=12,34,56,78,90,12,34,70

FYI. Changing imei in the US is illegal (there's a federal statute against it, and Big Bubba's waiting for ya in jail lol), however repairing it with the original imei should be ok, though it's a gray area. Just to be clear, the above is for information purposes only, I do not condone the use of it in any shape or form.

Thanks for your post. but how to calculate the encryption key-xxxxxxxxxxx? any tools?

User avatar
Didneywhorl
Posts: 2529
Joined: Fri Mar 23, 2018 5:37 pm
Location: USA
Has thanked: 936 times
Been thanked: 529 times
Contact:

Re: MC7455 / EM7565 vs. Quectel EP06 IMEI Change

Post by Didneywhorl » Mon Sep 21, 2020 10:08 pm

The specific imei change commands cannot be posted on this site, but I think you will find what you need by searching for Daniel Woods SierraWirelessKeyGen on the interwebz

Adm1jtg
Posts: 314
Joined: Sat Aug 08, 2020 7:19 pm
Has thanked: 6 times
Been thanked: 100 times

Re: MC7455 / EM7565 vs. Quectel EP06 IMEI Change

Post by Adm1jtg » Fri Sep 25, 2020 5:01 pm

please ignore

Earl_the_Pearl
Posts: 12
Joined: Sun Aug 15, 2021 12:17 pm
Has thanked: 1 time
Been thanked: 1 time

Re: MC7455 / EM7565 vs. Quectel EP06 IMEI Change

Post by Earl_the_Pearl » Sun Sep 12, 2021 2:36 am

Getting into the locked area of the modem where things can be "repaired" is possible using
https://github.com/bkerler/edl. Using that group of programs I was able to unlock the engineer section where one can change things that are not available in the open area.

Using the programs one can unlock modems up to the M5's Snapdragon X55. Bkerler is working on newer modems, he will take requests. Don't let the code scare you off, I got most of it to run using the included scripts. It helps of one is familiar with Linux and Python; I was not familiar with ether and got it to run.

If you run into trouble search the Wide World of the Web and you will find the answers, I did. :mrgreen:
I got this 4G speed using my "repaired" M5 on AT&T's iPad unlimited plan. This was after I used over 22 gig for the month too.
Image

Post Reply