I needed a 1800 number for my business, and paying for a second phone line and getting a second phone is overpriced for what I needed. for 10 bucks a month, OpenPhone allows me to have a 1800 number right on my own cell phone through their app. So my personal calls don't get mixed up with my business calls. The app is easy to use, has a voicemail feature, and call forwarding for when I'm out and don't want to use data.