I have a Linksys WRT54GSv3 & Motorola SB6120 modem on Comcast. For the past month my iPhone only get's 2 bars of wifi around the house and 1 in the garage and it always used to get 3 bars. Same with my iPad. I had open NAT for xbox live setup and now it says moderate, yet I've never changed any settings. I've tried rebooting both router and modem but it didn't seem to help. Any suggestions?