Hutch1 macrumors 6502a Aug 30, 2009 #26 Never had any problems with wifi on my 3GS or 3G for that matter. There are only 3 segments on the signal strength to begin with, so it goes from full to not full strength, maybe your router's transmitter power is just on the edge.
Never had any problems with wifi on my 3GS or 3G for that matter. There are only 3 segments on the signal strength to begin with, so it goes from full to not full strength, maybe your router's transmitter power is just on the edge.