Thank you for your asking. Kindly provide the information below so that we could better assist you.
1. Your current firmware version
Settings>System>About Phone>Software information
If you try to update to the latest version, does the issue still remain?
2. Does the issue appear after any system/apps' download or update?
3. Could you receive/send calling and send text normally? Does the issue only appear in receiving text?
4. Any apps has the same issue? If the app has the same issue, which version of the app? If you try to update to the latest version, does the issue still remain?
5. Please check if the phone storage is ok. Settings>Storage & memory
6. Did the phone break or fall before?
7. Please try to enter "Safe Mode". If the function works well in Safe Mode yet the issue remains out of Safe Mode, please check on any disturbance from the installed 3rd party apps.
# How to enter and exit "Safe Mode"https://www.asus.com/support/FAQ/1005163/
8. Please try SMMI test
Calculator> type ".12345+=">SMMI TEST>Single Test>SIM Signal Test/Wi-Fi Test
If the SMMI test fail, kindly bring your device to the nearest ASUS repair center for device checking: https://www.asus.com/support/Service-Center-All-Countries/
If it is impossible to access the service center during Covid-19 period, please try Call us: https://www.asus.com/support/CallUs