We needed help with our sign on, we already had a electrical tech at the house and they had tried everything with no luck. We called 855-847-6378 which is supposed to be customer support for Nest but they kept hanging up on us every time we would tell them our problem. We called back three times and were hung up on three times then the line was busy thereafter. Our technician said to just use google so that is what we will do from now on but I just wanted everyone to know before you sign up for Nest, look around, any other Company you find will be 100% better than Nest if you ever need support!