My school district that I teach in went "open technology" this year, meaning students could carry and use whatever kind of technology in the halls and in the classroom. Although many teachers, myself included, were more than a little worried about managing student use of phones, iPads, and laptops during class, the new open technology policy turned out to be great. We all knew that the students were carrying and using cell phones before the rules changed; the only difference now is we can incorporate more technology into the curriculum.
When I asked, "okay, who has a cell phone?", every single hand shot up. The students are so tied into their phones as part of their social life, it almost seems a cruelty not to let a kid have a phone.