Thanks, sigh.  I landed up removing my shims because they worked well for a couple of weeks then the phone started overheating.  Wifi worked fine for a couple of hours, then started overheating again, although this time my screen went dark, which I assume is related.  Rebooted again and turned off wifi, screen is back to normal.   I guess it really is time for a new phone.  I loved my G3 and had no issues with it for 2 1/2 years....trying to decide whether to take the risk with the L6, which does have a free 2nd year warranty that you can get from LG.   Coin toss, I guess.  Also looking at the Moto Zs.  I HATE having to choose a new phone.   Won't consider Samsung, don't trust them after owning the Galaxy Nexus with wifi that mostly didn't work plus various other exploding devices and appliances.   Gack.