Change where you receive calls in the mobile application! Forward Calls Transfer Calls From Mobile
If you want to enable or disable a cell phone or voip phone, hold your finger to the one you want to disable, and swipe it to the left. This will show a trashcan (to delete the entry), a pencil (to edit the entry and then enable or disable it), or an X/Checkmark (to enable/disable the entry). Enabled entries will have a green bar on their left, disabled ones will have a red bar on their left.
Be sure your cellphone is marked Green if you want to use the ringbyname mobile app to make business calls!