ZenFone 4 (ZE554KL)
Since the server pushes update notice to different serial numbers by batches, it may take some days for you to receive the FOTA notice. Thanksfor your patience. You may tap “System updates” in [Settings] >[System] to check if there is new firmware available. Or, you can also try to manually update firmware by referring to the following link.How to update firmwareon my phone?
1.2019-01 Google security patch updated
2.Google Mobile Services (GMS) version 201810 upgraded
3.System charging stability optimized