Timidviper.. you were probably lucky
sorry had to say it!!
But I agree with the rest..now is the time to become the most unpopular mother ever..and come down very hard on her.
The phone thing is easy.. remove her sim (I second Giffgaff btw, google them....run on the O2 network and their deal is a p+g one ..I have switched all my teens to it as their contracts ended, and myself and it is SO much cheaper!). She needs to pay you back what she owes too.. whether by doing jobs or loss of pocket money..
I put my DD2's phone in our safe for 2 months after she came home legless at 14.... she hasn't done it since! (now 17)
The boyfriend is worrying because the chances are she is having sex if he is a couple of years older.. you need a calm clear conversation and if needs must, maybe think about her going on the pill if you can't be sure they use condoms:(
However..please don't despair.. she probably will become human again eventually! I have 4 teens, and we are moderate parents.. pretty open but with a few strict boundaries.. two teens have been easy, one (DD2) did the alcohol -lambrini thing, and one , DS1..was hideous.. stole, lied, got in trouble with the police with his moped at 16, got arrested for something that thankfully he hadn't done.. I didn't trust him at ALL and he was rude, nasty, violent.....
and now at 18 a switch has flicked , he has become a lovely young man.. hormones settled, has a local job etc etc. I thought we would have to throw him out when he was 16 after 3 years of hellish behaviour, but he has grown up!
Incidentally my DS1 was stealing (from us) to be popular.. it went on junk food and fags and making himself look big, and in his case wasn't drugs. We got a safe in the end, but am glad to say haven't needed to use it since he was 16:) So hang in there.. be tough..be prepared for the utter vileness hat is a thwarted teenager.... she will come out the other end:)