03-20-2024 02:37 PM
Model Name: ZenFone 9
Firmware Version: 34.3040.2004.87
Rooted or not: no
Frequency of Occurrence: started right after update, then continuous. Okay for about two days after factory reset, then continuous.
I restarted my phone last Thursday, and I think it installed the update to Android 14 and the newest firmware.
After the restart, it got stuck in a loop, just rebooting over and over.
It would show the Asus Zenfone logo, the Snapdragon screen, and sometimes get to the locked screen. It could be unlocked, and I could get to the home screen, if I was quick about it, but either way it would reboot again.
I started it in Safe Mode, and found that it was stable. I could from there reboot it and start normally, as long as it remained in airplane mode. If mobile or WiFi data were turned on, the rebooting would continue.
I did a factory reset, and that seemed to work, but after about two days, the problem reemerged and the rebooting started again.
I don't know if there is a reasonable way to roll back he firmware/Android version, or some other solution. I can't be sure it was the update, but I'm not sure what else could be causing it.
03-26-2024 11:14 PM
This is a known workaround of the boot loop, to utilize at the minimum, WiFi capabilities of the mobile device while we wait for ASUS to develop an update to fix the AT&T SIM card issue.
I would suggest following these threads to stay up to date so to not miss out on any helpful info 💪
- Other AT&T Zenfone 9 Boot Loop Thread
- Oldest AT&T Zenfone 9 Boot Loop Thread
03-28-2024 06:40 AM
An update addressing the AT&T SIM Card issue has been released for the ZF9. Release Announcment found here: 3/28/2024 Zenfone 9 Android Update