I'm so sorry to hear that pal, better be careful and be around or next to your friend while they're handling your iPhone. That's what I do all the time, monitor what they're touching and doing. Well, last night I dreamed my iPhone can't start up and it's spoiled after I dropped it.  After wake up, felt insecure and try to start up my phone, luckily it works and it's just a dream.

You ASK him to PAY for the iphone... he drop it so he should pay for it.. you cannot just let he do it like that... what ever happened, ask him to buy 1 for you, even though he dun have the money, ask him to sell his old phone and collect money just to buy new iphone, he still ur friend but its ur phone that is drop, and remember that here in malaysia there no warranty for that(even if no drop and unlock, stil considered no warranty,huhuhuhu) but its ur iphone mate, ask him to buy 1 new phone for you and you gave him ur phone...

p/s: but if there no internal damage you can ask someone in forumer repair/change cover for you, but as i can remember, its expensive, but make sure ur friend PAY for it... if me i will ask him to buy new 1, even though there no internal damage....iphone is "MY precious" ooooOooooooOooo....like smeagol said in LOTR, "mY Precious"

it is veri hard to ask him to pay lah ...
and some said i m showing off ?? omg i m just take my iphone out  and he just grab it , wat did i do ? nothing wat ~
i prefer NO PAIN ALL GAIN !! ...
my advise to all fellow ~
plz buy protection   i pay for my lesson dy ...