If your ZUK Z1 can not automatically connect to the wifi you've been using, that's caused by a small bug which has been fixed.
Please go to Q&A and follow the instruction to get your OTA update.
The steps are very easy, we need to verify your DeviceID first, then an OTA update will be available on your Z1.
1. Download the APK from the Question No.6 in Q&A, then get your DeviceID from the APK.
2. Send your DeviceID to the email:
3. Your ZUK Z1 will be received OTA update shortly