We only signed on with them in May and have had nothing but trouble trying to get our phone system up and running properly. We pumped up our customer base with the promise of our newly offered phone support, and have been paying staff to answer these calls. However, the calls never come. The reason: All of our phones for some reason will automatically return to an Unavailable state for no reason. So every few minutes you have to log into the RingCentral website to change it back, or go into your voice mail options on your phone to change it... read full review »