[asdajksah2123]

I suspect they first became mobile phone friendly. Dumbphones provided kids a way to communicate with parents and the worst distraction would be kids wanting to play snake and/or texting little messages to each other on their T9 keyboards.

But once smartphones came around they replaced those dumbphones and snuck in through the same policies, but in reality they're a completely different category from dumbphones.

[moolcool]

Dumbphones weren't allowed in my high school, but apparently smartphones are now.