Some schools collect them at the door and give them back at dismissal.

Back in the day, we weren't allowed to use calculators (They kind of look like cell phones)...
All we did on them was write BOOBS and HELL using numbers.

Oh the travesty!!!! :D

When I was still working, we used to have something right inside the door, be it a basket, bucket, or whatever when we were going into an important meeting. Every electronic device of any kind was expected to be deposited in that receptical. Then it was removed from the room.

If someone's device "went off" in the room during the meeting, that person was invited to leave. If they were a key player, they weren't anymore and we found someone else. No quarter.

I would expect this same level of discipline in public schools. Do whatever the hell you like between classes, but when you enter the classroom, your electronic devices get collected and left outside. If yours goes off in the room during the class, you get dismissed. No excuses.

As far as "it worked when I turned it over and it doesn't now" b.s., it's just too darn easy to verify this stuff these days. Should be a non-issue.

Dress codes are fine. Keeps the gang element at bay. Hair styles and other "permanent" things like that, not so much. Unless it's readily identified as gang related.

I'm in the no cell phone camp. My brother had 5 kids. Two of the oldest went to the local public high school with no specific dress codes. The other three went to Catholic high schools with a dress code. He mentioned to me there we no more arguments on what was appropriate to wear, one less debate to have. It is a uniform that makes everyone look at the same level.
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I went to public school in the 50s and 60s. We couldn't wear jeans, shorts and the girls couldn't wear pants. Different times

why do you think less arguments is a good thing?

why on earth would you be arguing with your children about something like clothing? you are a parent, presumably an adult, act like it.

do you not want your children to be individuals?

I was a teacher for Dallas ISD for 15 years and was there before and after a district wide uniform policy was implemented (K-12); it did not make a shred of positive difference in terms of student conduct or academic performance.

I have observations about cell phones in schools, and policies tried out to combat them, that I'll post about when I have more time.