iPhone®

Compatibility:  Requires iOS 10.0 or later.
Compatible with iPhone®, iPad, and iPod touch.
This app is optimized for iPhone® X.

Android

Requires Android 4.0 and up.

Note:  each carrier determines the features that may or may not be changed on the phone or browser.  It is best to contact the carrier and request a list of phones that support the minimum browser requirements.   US Cellular only allows web access on smart phones.