Release Note

[More Information Needed] Sim card #1 randomly is unavailable.

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forevermaat THA Level 2 | All posts
ZenFone 4 Bug Report
ZF Model: ZC554KL
Firmware/APP Version: OPM1.171019.011.WW_Phone-15.2016.1809.412-0
Frequency of Occurrence: 1.4ghz
Rooted: No
APP Name: SIM Card settings
Screenshot: -
About 2-3 days ago, i start to notice that my Sim #1 suddenly is Unavailable.  I think it might have something to do with the tray.  

To fix the problem, i will eject the tray and then close it again and everything seems to work ok (sim #1 + sim +2 + microSD is all "available) .  But i am afraid the sim will become unavailable and i will miss calls.

I dont think it is strictly an OS problem.  It was working perfectly and i rarely open the SIM tray.  I was upgrading the MicroSD card.

I still have a warranty.  7 months or so.
TWN Moderator | All posts
Hello  forevermaat

Thanks for your inquiry.
Have you still encounter this problem recently?
I yes. Please kindly refer below tips for troubleshooting
(1.) turn on airplane mode > for 3 seconds > then turn off it.
(2.) use another different sim card for a check.
(3.) check this matter in safe mode. (

Thank you.
forevermaat THA Level 2 | All posts
I opened up the sim tray a couple more times.  I also cleared the cache in  recovery mode.

So far it seems to have returned to normal.   I would hate for the tray to be the issue.   A sim card rarely "goes bad" all of a sudden.
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