1. Your 3G can't detect any wifi networks at all. You can only see the little search circle going round and round but no networks are detected. In the general/About settings you can see your bluetooth and wifi address, everything else works fine including GPS.

2. You have tried the "radio readnvram" option with iRecovery and got no info or response confirming your problem is hardware related.

My questions are can the wifi chip  need to be replace with a soldering iron / Heat Gun . for the work process must know the technical skill in order to

replace the IC Chip. see picture below ,  contact us for more information