# Update problem on WR21

**URL:** <https://forums.digi.com/t/update-problem-on-wr21/22392>\
**Category:** Digi TransPort WR (Series)\
**Tags:** firmware-update, wr21\
**Created:** [May 6, 2021, 10:21am UTC](https://forums.digi.com/t/update-problem-on-wr21/22392 "2021-05-06T10:21:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![martincc](https://avatars.discourse-cdn.com/v4/letter/m/90ced4/32.png) [@martincc](https://forums.digi.com/u/martincc)\
**Post date:** [May 6, 2021, 10:21am UTC](https://forums.digi.com/t/update-problem-on-wr21/22392/1 "2021-05-06T10:21:17Z")

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Digi TransPort WR21-L12B-DE1-SW  
Huawei Technologies Co., Ltd.  
ME909u-521 (12.636.12.01.00)

During firware update to 8.3.0.1 we lost connection and onsite reboot wont get it back working.  
error message: \_deferred :: deferred polling(target firmware 8.3.0.1 not running on router yet. it’s running 6.1.3.5)

Is this a known issue. can it be fixed or do we need to factory reset them?

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**Author:** ![shatman](https://avatars.discourse-cdn.com/v4/letter/s/46a35a/32.png) [@shatman](https://forums.digi.com/u/shatman)\
**Post date:** [May 6, 2021, 3:25pm UTC](https://forums.digi.com/t/update-problem-on-wr21/22392/2 "2021-05-06T15:25:20Z")

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You are using VERY old firmware and unsupported cellular module  
Also, 909ME was not certified in NA  
Try recovering with a Flashwriter. Otherwise we have replacement routers. Please contact your local Digi distributor