Please tell us some basic information before asking for help:
Model Name: ASUS ZENFONE MAX ZC550KL
Firmware Version:In screen shot image
Rooted or not: NOT
Frequency of Occurrence:VOLTE UPDATE
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
========================================
