so i'm riding along in SoCal getting ready to cross the border and my Zumo 550 loses the satellite. it goes into the "acquiring satellites" mode and finally goes into the routine where it prompts me to answer if i'm indoors, where my location is, the time of day, etc. i answer all of the questions and it goes back to trying to pick up the sat connection. i was able to connect to a satellite briefly several hours later in San Felipe but then it quit again for good. my buddy is running the same unit and had no interruption in service. i've been on hold with Garmin Tech support for 15 minutes and extended service plan ph number has been busy every time i've called. is this most likely a hardware issue?? i have all other functionality, the unit is only a year and a half old and never dropped. i haven't updated to the recent Garmin maps but i wouldn't expect this to be the cause.