Hi
GiaThank you for your asking. Kindly provide the information below so that we can better assist you.
A. How did you installed the firmware V98? By manual update or auto update? Can you provide me the screenshot of your current firmware version?
Settings>System>About Phone>Software information>Build Number
B. Please try the following steps to access recovery mode for the Factory Reset.
0. Try to back up your data with USB cable. If you can not access the phone, please check if your google account or microSD card have auto backup your data.
1. Power off the phone, then keep pressing "volume down key"
2. Press "power key" and stop press " power key" once you feel the vibration. Still keep pressing "volume down key".
3. Stop press "volume down key" once you enter [Android Recovery] Screen
4. Choose "Wipe data/factory reset">"Yes"
5. "Reboot system now"
#Hardware Reset Guide
https://www.asus.com/support/FAQ/1006346/Please note that once the steps are completed, all data, apps, settings and personal information will be deleted.
C. If the issue remains the same, please check your inbox and provide me your SN, IMEI, RMA no. for further checking.