# Downgrade R17 to R13.1

**URL:** <https://forum.legato.io/t/downgrade-r17-to-r13-1/6751>\
**Category:** Legato Linux distribution (Yocto project)\
**Created:** [June 14, 2024, 3:15am UTC](https://forum.legato.io/t/downgrade-r17-to-r13-1/6751 "2024-06-14T03:15:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![vyoma](https://avatars.discourse-cdn.com/v4/letter/v/dbc845/32.png) [@vyoma](https://forum.legato.io/u/vyoma)\
**Post date:** [June 14, 2024, 3:15am UTC](https://forum.legato.io/t/downgrade-r17-to-r13-1/6751/1 "2024-06-14T03:15:35Z")

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Module: WP7608  
Background: some devices are in the field that are built with R13.1  
My testing setup with the R17. I want to degrade to R13.1. I want to test the same scenario of the field device.

I tried the office version “WP76xx\_Release13.1.1\_GENERIC\_GCF.exe”. but it could not downgraded.

how to wipeout all and flash R13.1.1

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [June 14, 2024, 3:17am UTC](https://forum.legato.io/t/downgrade-r17-to-r13-1/6751/2 "2024-06-14T03:17:28Z")

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officially you cannot do so:  
[https://source.sierrawireless.com/resources/airprime/software/wp76xx/wp76xx-firmware-release-17/#sthash.N16iI5h9.dpbs](https://source.sierrawireless.com/resources/airprime/software/wp76xx/wp76xx-firmware-release-17/#sthash.N16iI5h9.dpbs)

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**Author:** ![jack.heaffey](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@jack.heaffey](https://forum.legato.io/u/jack.heaffey)\
**Post date:** [September 5, 2026, 9:47pm UTC](https://forum.legato.io/t/downgrade-r17-to-r13-1/6751/3 "2026-09-05T21:47:01Z")

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Is there an unofficial way to downgrade? I had just bought a batch of WP76xx modems to find that they cannot be downgraded to the version that my product requires!

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [September 6, 2026, 1:22am UTC](https://forum.legato.io/t/downgrade-r17-to-r13-1/6751/4 "2026-09-06T01:22:10Z")

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If just one or two modules, distributor can help to generate a debug version for each module

But this unofficial way should not be applied to a batch of modules