If you have the backup files, you can easily flash back to stock. Just follow the instructions at
That usually indicates either a broken ART partition or the wrong firmware file.
How did you install OpenWrt? Are you sure that you've got a Pro model?
Sorry, I don't know much about this. I used alternative firmware on my Linksys 20 years ago and it worked. I thought it would be similar here, but the problem is I don't know how to revert to the stock firmware, and I don't know enough to fix the Wi-Fi not working. That's why I posted on the forum for help. I need more accurate data on bandwidth usage. That's why I wanted to install OpenWrt, and now I'm having trouble because I don't have Wi-Fi.
I installed it according to these instructions, using Option 1.
Regarding the version, after logging in to ZTE, the detailed information showed hardware version: MF287PROHW1.0.
Additionally, there's an NFC tag on the case in the center of the circle with the LTE LEDs. From the information I found, this confirms that it's the PRO version.
Hey, is there a chance to enable wifi on this device with openwrt or do I have to go back to stock ZTE? Can someone help me figure this out?