I can't say, but they did respond to me really fast when I contacted them. Also their feedback is good.

I've ordered one from them but I made it a gift to someone so until I'm told it's not faulty I won't know.
Warranty is a bit tricky since Nokia US might be reluctant to have a look at the device, but I'm sure if there's something wrong with it Yellow Deals would replace the device and we would avoid Nokia.

Also I'd rather deal with them from Amazon Market since the others I contacted refused to tell me where the device was made and ignored my questions.