My 16 year old is campaigning to have the phone in her bedroom at night to 1) listen to music 2) read fan fiction 3) use the alarm. She feels she should be able to choose when she uses it, and has said that she feels she needs to learn by herself how to control her own use (and make and learn from her mistakes). She also says (of course) that none of her friends have any restrictions.
We have pointed out that it is difficult for many adults to put the phone down, and the makers of the phones have engineered it so they are addictive.
Currently the only limits are not at meals, and plugged in downstairs at night. Generally she is in good relationship to us. Not too much activity aside from school though.
What are your rules?
Do you leave them to it, or do you have agreements?