|Interesting that you & your buddy have the same equipment, |
and the same problems.
You said the LAN connected PC (via Ethernet cable I
assume) stays connected. Test to see if it stays connected to
the Internet and not just the router.
Interent drops repeatedly (which may not be your issue):
Improving Wireless Range: Overview:
I'd make sure all your settings on the router are correct,
enable logging too for better troubleshooting.
Testing the WiFi router w/o the wireless phones powered on for a day or two may be a good test.
I would also try changing the WiFi channel on the router to 1, 6 or 11. I have seen some 2.4 Ghz routers work OK with 2.4 Ghz phones, and I have seen issues with phones. Doesn't happen often, but once or twice I was at a customer site, phone rang, then WiFi on laptop disconnected.
Just another stupid saying...