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Zenfone 5Z merge call hangsup

Star I
Please tell us some basic information before asking for help:
Model Name: Asus Zenfone 5Z Z01RD
Firmware Version: v1.04.07.13
Rooted or not: Not
Frequency of Occurrence: most of the time
APP Name & APP Version (If your issue relates to the app): phone
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.


Star I
Any solution to it......

Community Legend II
Hi Rafaz
Thank you for your asking. Kindly provide the information below so that we can 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 persist?
2. Does the issue appear after any system/apps' download or update?
3. Do you face the issue with SIM signal only or Wi-Fi signal as well?

Please try the troubleshooting tips below
1. Take out the sim cards> Insert the empty sim port to the end>Re-insert the sim port with sim card
2. Please try reset Network: Settings>System>Reset options>Reset Wi-Fi, mobile & Bluetooth
3. 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"
4. Also, please try "the Factory Reset" 
Settings>System>Reset options>Erase all data(factory reset)
Please note that once the Factory Reset is completed, all data, apps, settings and personal information will be deleted.
5. If the issue persists after troubleshooting above, please check your SMMI test: Calculator> type ".12345+=">SMMI TEST>Single Test>SIM Signal Test/Wi-Fi Test
If any of the SMMI tests fails, indicating high possibility of faulty hardware, kindly bring your device to the nearest ASUS repair center for device checking:
If it is impossible to access the service center during Covid-19 period, please try Call us: