Do you have to use the phone to accept payments with this service?

[#1]

Kind of. Square is compatible with most Apple iOS and Android devices (tablets and phones) running the latest software versions. You can check out more details here: 

https://squareup.com/help/us/en/article/3887-devices-compatible-with-the-square-magstripe-and-chip-card-readers

[Sean]

Kind of. Square is compatible with most Apple iOS and Android devices (tablets and phones) running the latest software versions. You can check out more details here: 

https://squareup.com/help/us/en/article/3887-devices-compatible-with-the-square-magstripe-and-chip-c...