# Swiflash -r broken with release 12 on wp77xx?

**URL:** <https://forum.sierrawireless.com/t/swiflash-r-broken-with-release-12-on-wp77xx/20957>\
**Category:** Development tools\
**Created:** [July 17, 2020, 12:19pm UTC](https://forum.sierrawireless.com/t/swiflash-r-broken-with-release-12-on-wp77xx/20957 "2020-07-17T12:19:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![elie.taillardat](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/elie.taillardat/32/5408_2.png) [@elie.taillardat](https://forum.sierrawireless.com/u/elie.taillardat)\
**Post date:** [July 17, 2020, 12:19pm UTC](https://forum.sierrawireless.com/t/swiflash-r-broken-with-release-12-on-wp77xx/20957/1 "2020-07-17T12:19:38Z")

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Hey,  
After a board issue (see topic [https://forum.mangoh.io/t/cannot-access-mangoh-yellow-wp7702/4848/27](https://forum.mangoh.io/t/cannot-access-mangoh-yellow-wp7702/4848/27)) I think there is a problem with the `swiflash` command and its `-r` option for recovery mode. With fw R12, this tool doesn’t work, I had to downgrade to R11 to be able to use it.  
Thanks 😉

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [July 18, 2020, 4:08pm UTC](https://forum.sierrawireless.com/t/swiflash-r-broken-with-release-12-on-wp77xx/20957/2 "2020-07-18T16:08:51Z")

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According to the release note of fw r12, QTI9X07-2870 is to fix userapp partition being erased which is security hole.

You might also try the following without downgrading to older version:  
(Be careful of the mtd number, different FW might have different mtd number for userapp partition !!! )

```auto

root@swi-mdm9x28-wp:~# cat /proc/mtd|grep userapp -i
mtd16: 08300000 00040000 "userapp"
root@swi-mdm9x28-wp:~# pwd
/home/root
root@swi-mdm9x28-wp:~# ls
UART_Test1.wp77xx.update
root@swi-mdm9x28-wp:~# flash_eraseall /dev/mtd16
flash_eraseall has been replaced by `flash_erase <mtddev> 0 0`; please use it
Erasing 256 Kibyte @ 82c0000 -- 100 % complete
root@swi-mdm9x28-wp:~# reboot

```