dd (12) has an iphone, but she's only just got one, am afraid at secondary, ime, yes, snazzy smartphones is the norm. some of dd's friends have iphone 5's.
we were going to go down the route of an entry level smartphone and had picked one of the huewai ones on a low priced contract, but i was put off by the contracts being 2 years. dd started with a giffgaff sim and my mum's old handset, we've now moved her to orange and she's on dolphin (£10 a month for 400 texts, 1gb of data etc), and we bought an iphone second hand.
if dc's def want a smartphone, i'd recommend the second hand route, after a tip on here, we checked out smartfonstore, and i got a grade b iphone 4 for about £125. dd hardly uses the phone side of it, everything is done via wifi and whatsapp, instagram etc
every parents has to make decisions they see fit, it works for us dd having a phone, she walks to and from school, does after school stuff, goes to the shops with friends etc, the phone has been invaluable (plus it's got that iphone tracker app on it so i know where she is
).