7 wks ago i bought a tomtom go620 to replace my via280. reason being the go620 has life time world maps. found out that the go620 does not have japan or china maps, yet they do have factory fitted gps in there vehicles. 2 more items are missing on the go620 that are standard on the via280. no favorites and no turn on off voice guidance. yes i made sure that the sound is working. the only voice guidance i receive is you will be at your destination in 15 minutes. I can't rely on having a navigator in the car and i can't look at my device and drive at the same time. it's just as bad as using your mobile when driving. what can i do?