Currently, I only use my iPhone 12 Pro on a regular basis. This phone has my private number through a nano-SIM card. The phone also has a SIP client for my international telephone number(s), and a VOIP client dedicated for my toll-free telephone number. With all of this said and done, it is the only phone I need to use on a regular basis.
I do have a second phone, but this is used exclusively for when I can’t use my iPhone 12 Pro for some reason. In any event that you would seek to reach me via phone, you would be calling the iPhone 12 Pro.