Saw them. Heard of them. But never used one. My first cell phone was a Tracfone ("candy bar" style) and later a Tracfone flip phone (Motorola). My wife's first cellphone was a Nokia from Sprint. Tiny monochrome screen. You could play "Snake" on it. My first smart phone was an iPhone 4S, then an iPhone 5C (the last non-TouchID phone; I still miss it (it was blue)), then an iPhone 6S, and now an iPhone SE. I'll eventually (be forced to) have to upgrade again (just like with my 6S, which was obsoleted) and it will probab ly be a FaceID iPhone. But as long as I don't HAVE to use the biometric feature, I'll keep buying iPhones, as I am familiar with the UI and prefer it over Android devices.