Hi every one !
I got the same problem with my own smartphone Lg Pro2 LG-F350K
I resolved the no wifi issue just by 1 step 1 ~ opened my phone and took out the mother board out of my phone !
step 2 ~ used a simple hair dry to burn few second the mother board for 1 ~ 2 minutes clearly !!
step 3~ replace mother board into the body phone
WIFI SIGNAL AND NETWORKS GOT ALL BACK ^^
BEST SOLUTION
SAFE
COST NO.MONEY
from David in paris ~france