I found this on Motorola's site:
Exclamation sign shown with WiFi connection - The exclamation point is shown when the WiFi signal is determined to be of lower quality; if there is no exclamation point the signal is higher quality. Internet access can still take place when the explanation point is showing.
Exclamation sign shown with WiFi connection - The exclamation point is shown when the WiFi signal is determined to be of lower quality; if there is no exclamation point the signal is higher quality. Internet access can still take place when the explanation point is showing.