BEFORE you rush over to Whistler for customer service (lol) (LOL) (HA HA HA HA) you might want to read a a few reviews about them. Further, my honest opinion is that they do not make a scanner that can hold its weight against the 436. And now there is the SDS; no one will beat that anytime soon. I hope you haven't given up yet. I've had a 436 for several years now and never a problem. Give the 436 a chance. You never did say why it quit or what happened to it.