Your WiFi problem is most likely due to one of the following:
The device needs to be wiped... try doing a factory reset (do it twice... sometimes a double wipe seems to be necessary on these).
You've got yet another model with a different WiFi chip inside... I doubt this though...
The install didn't work quite right because you used the 4g recovery with a different partition layout in the recovery kernel than your ROM uses... this would require reflashing with the correct recovery to fix...
ShaunMT
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