There are also helpful answers to frequently asked questions regarding children and cell phones.
Many schools are considering policies to promote BYOD (Bring Your Own Device) to school to aid in individualized instruction. Smartphones are among the devices included in this initiative. Do you have opinions/concerns about your child having a cell phone at school?
Personally, I think the distraction factor would be a huge headache. Teachers would have to institute some strict protocols for when they can use them and how, though the latter is hard to police. Whether it outweighs the benefits I guess depends on how they're used in the curriculum.