Wifi don't work? Flash this! /Persist Repair
Well, many people have problems on the /persist partition, maybe because some bad rom, or maybe because by a mistake you formatted them on a recovery (a bad recovery without forbid partitions).
Before this zip, you have to copy the "WCNSS_qcom_wlan_factory_nv.bin" to /persist manually, but some file managers don't mount well /persist.
But now, only flashing this zip, it will copy the file to /persist and Wifi go back to work.