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[Replied] [System] Bootloop, no recovery only fastboot mode

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shaieyalis ISR Level 2 | All posts
ZenFone2 Bug Report
Model: ZE551KL
RAM: 3G
Firmware/APP Version: WW_user_21.40.1220.2181_20170805
Frequency of Occurrence: ?
Rooted: No
APP Name: -
Screenshot: -
Dear forum members,

My ZE551KL fails to load for 3 days. Initially it boot looped and I was able to reach fastboot mode and recovery mode. I've tried downgrading to the last official ROM, which is UL-Z00T-WW-21.40.1220.2056-user, via recovery but it failed. It prompted a message that it is not possible to install over a newer version. I got 21.40.1220.2181_20170805 using standard system updates. Not sure why I got it if the last official ROM is older. I read few threads on this forum saying I first have to flash a new recovery and only then I could install ROM UL-Z00T-WW-21.40.1220.2056-user. Therefore I started the device in fastboot mode and flashed recovery 2.15.40.10. Ever since I cannot load in recovery mode. If I boot normally the device is in boot loop. If I boot pressing volume up or down it will load into fast boot mode. There a blue text "Fastboot Mode!!!". My guess is I flashed a bad recovery but I dont really know.

Please let me know what I should do to restore my device. it is not rooted and not under warranty.

Many thanks in advance for everyone!!

Regards, Shai
Props
TWN Moderator | All posts
Hi shaieyalis,

I would suggest you contact our service center.
Call Us: https://www.asus.com/support/CallUs
Service Center: https://www.asus.com/support/Service-Center-All-Countries/
Thank you.
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