If you own a Garmin Nuvi 1100,1200,1300 or 1400 series unit there is a very important update that Garmin released today. It addresses the constant restart problem they are experiencing with some units. I upgraded to a Nuvi 1390T last month after I had my previous model stolen. I am on my third unit because of this problem. They would last about 2 weeks then lock up and wouldn't load past the Garmin logo screen then restart. This is for units that haven't malfunctioned. If your unit is stuck in the restart mode then you have to send it back to Garmin. I bought mine from Best Buy with all the extra protection they offer and they were getting tired of me returning mine.