I've had the V600 for about 3 weeks. It has great features, but it "locks up" for short periods of time (1 minute to 2 hours). It eventually comes "back to life", or the batteries can be removed and the device rebooted.T-Mobile has no plan to make these work. This is a "Known Issue". Motorola has not plans to fix it. The V600 is approaching "End-of-life".Cingular recalled ALL of their V600s and replaced them.If T-Mobile cared about retaining their best customers, they would replace all V600s with a reliable phone.