I got an SPA500S for my SPA514G phone. I selected in RingCentral that I have a sidecar and my phone seemed to update, but I can't figure out how to program it. I've tried pressing and holding a button on the sidecar for 3 seconds, but all that happens is the phone screen lights up upon release. All the research I've done online keeps telling me to find my phone IP address, which I can't do, as my phone doesn't seem to have a "setup" button. Any help would be much appreciated.