No Data Signal - Latest Firmware

[nathanw_01]

ZF Model: ZE554KL
RAM: 4G
Firmware/APP Version: Latest
Frequency of Occurrence: 2.22GHz
Rooted: No
APP Name:

Last edited by nathanw.01 on 2019/1/15 23:19 I have a Zenphone 4 Model ASUS_Z01KD Ever since the lastest firmware update, I cannot connect to 4G, or use any mobile data. Wi-Fi is fine. I can send texts and receive calls fine. I cannot connect to 4G. My phone's service status claims: Voice: In service Data: In service Mobile network state: Disconnected I have spoken to my network provider, who say that there are no issues with their network, and that other users are not having this issue on other devices. Is there a fix? Can I roll back my firmware version? I may need a temporary replacement if this issue is not resolved. Thank you.

[Christine_ASUS]

Hi shahrizansarip83 
Thank you for your asking. Kindly provide the information below so that we can better assist you.
1. Does the issue appear after any system/apps' download or update?
2. Your current firmware version
Settings>System>About Phone>Software information
If you try to update to the latest version, does the issue still persist?
3. Please try to insert the SIM port without SIM card, then put the SIM card and re-insert the port again.
4. Does the SIM card work with other device? If it doesn't, change a new SIM card.
5. 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/
6. Please try reset Network: Settings>System>Reset options>Reset Wi-Fi, mobile & Bluetooth
7. What's your preferred network settings? (2G/3G or 2G/3G/4G)
8. 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.