# Can someone help explain the fields in AT!IMAGE? response

**URL:** <https://forum.sierrawireless.com/t/can-someone-help-explain-the-fields-in-at-image-response/15888>\
**Category:** MC/EM Series\
**Created:** [March 29, 2019, 5:22pm UTC](https://forum.sierrawireless.com/t/can-someone-help-explain-the-fields-in-at-image-response/15888 "2019-03-29T17:22:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![dchou4u](https://avatars.discourse-cdn.com/v4/letter/d/e9a140/32.png) [@dchou4u](https://forum.sierrawireless.com/u/dchou4u)\
**Post date:** [March 29, 2019, 5:22pm UTC](https://forum.sierrawireless.com/t/can-someone-help-explain-the-fields-in-at-image-response/15888/1 "2019-03-29T17:22:02Z")

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Hi all, could someone help enlighten me to what the different fields returned from the AT!IMAGE? command are? I am using a EM7455 module. I like to know what LRU, FAILURES and the difference between UNIQUE\_ID and BUILD\_ID.

Also is there a AT command to select the firmware to use without changing the PRI file? Right now I know of only using AT!IMPREF=“xyz” command to pick based on carrier name. This changes both the firmware and the PRI file, right?

Also yesterday used the AT!IMPREF=“ATT” command to change the preferred image from GENERIC to ATT. After doing a at+cfun=1,1 command to reset the module, I do see ATT in both the preferred and current when doing a AT!IMPREF? command.  
But then I did a AT!IMPREF=GENERIC to change it back to GENERIC. After doing the same module reset, I see GENERIC as preferred, and ATT as current. There is also 2 lines in AT!PIMPREF? that says something about name mismatch.  
Then today after I got into the office and powered up the module and did a AT!IMPREF? again, I see preferred and current both as GENERIC. Strange!  
Anyone has a clue why the current stayed at ATT yesterday and today it is GENERIC?

Thanks a lot! 🙂

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**Author:** ![anon56110884](https://avatars.discourse-cdn.com/v4/letter/a/ecb155/32.png) [@anon56110884](https://forum.sierrawireless.com/u/anon56110884)\
**Post date:** [April 1, 2019, 11:31pm UTC](https://forum.sierrawireless.com/t/can-someone-help-explain-the-fields-in-at-image-response/15888/2 "2019-04-01T23:31:26Z")

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The AT!IMAGE command is explained in the M2M developer’s guide that available at [https://source.sierrawireless.com/resources/airprime/software/image-switching-m2m-developers-guide\_r2/](https://source.sierrawireless.com/resources/airprime/software/image-switching-m2m-developers-guide_r2/).

The name mismatch just means that the user has requested that GENERIC firmware be active but something else (in this case ATT) is active. A modem reset (AT!RESET) typically will address the issue. The image switching process needs the user to reset the modem via AT!RESET

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**Author:** ![dchou4u](https://avatars.discourse-cdn.com/v4/letter/d/e9a140/32.png) [@dchou4u](https://forum.sierrawireless.com/u/dchou4u)\
**Post date:** [April 2, 2019, 2:40am UTC](https://forum.sierrawireless.com/t/can-someone-help-explain-the-fields-in-at-image-response/15888/3 "2019-04-02T02:40:44Z")

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Thank you so much for the pointers…