How to reset my iphone and start again from icloud?

My iphone 5 was stolen so have put a replacement sim into my sisters old iphone 4. I have reset everything on the phone and imported my contacts but can't seem to import all my apps etc… From icloud. I have hooked it up to iTunes and I restored a back-up which was the wrong one (doh). What I want to do is restore it from an old icloud backup. How can I do this?

No Sim Card installed in iPhone 4?

My phone will be working fine, then all of a sudden it tells me I have no Sim Card installed. It's been doing this everyday for the past week. I've tried taking the sim card out and blowing on it, I've tried togging the airplane mode on and off, I've updated my software and nothing seems to be working! I've had the phone for 2 and half years, so maybe the sim card is worn out? I'm not sure, but I need my phone to start working again so if anyone has any helpful suggestions I would really appreciate it!

Dropped my iphone 5 in a bucket of water?

So last night at a party i was bobbing for apples and i dropped my phone in the bucket of water.everything seemed fine, and i put it in rice.
but then thins morning, i went to unplug my phone, and it turned off, and now when i plugged it back in it keeps blinking between the apple symbol (the one when it is turning on) and a black screen

Is it cool to have an iPhone?

Like a week ago my friend asked me to bring my old iPhone 5 with me. I asked him why should i bring it when i already have my another phone (which i currently using now) and he just shush me and we went straight to the party. And when we arrived he took my iPhone 5 and went to his friends group. And when he came back later i asked him why he did that and he said it always cool to have an iPhone and every 15 years old must have one. Is it true? I have got myself a new iPhone 5s 2 weeks ago and since then he always use my phone wherever we go like when in class, cinema, park, mall etc. He always bragged about him with "his" phone in class because only i'm the one who use iPhone in class so far and that he just join in the club. I was confused… I wanted him to stop in the way that won't hurt hi feelings…

my questions are =

Is it true that all 15 years old must have an iPhone?

and

what should i tell to him to make him stop without hurting his feelings?

How to damage iOS on an iPhone 3GS?

I have a iPhone 3GS running iOS 4.0.3. I want to make it iOS-less. I mean to damage (delete) the iOS permanently. And don't ask why I want to delete it. I'm a tech geek and I love to do experiments that's why I'm doing it.

Teenagers: what would you do with 20 thoudand pounds?

Firstly I would give my mum 10 thousand pounds.

Shoe's: Loads of pairs of trainers
Vans, Nike blazers, Supra, Adidas, Lacoste (atleast 20-30 pairs. )

Clothing: I would get some designer clothes ( Not all designer ) then just whatever clothing I like the look of in shops.

Electricals: The new iPhone 5s (Gold), The new Ipad air, A good camera because I like photography ect.

I would also put some to charity.

How to sync my iphone 4 with a different PC?

I have an Iphone 4 and I want to update it to ios 7. But I can't use the PC I've synced my iphone. I've installed itunes to another computer. But I don't know how to sync without deleting my apps and photos. What to do?