Apple iCloud and Apple ID problems

So my mom and I have iPhone 4. My younger sister has an iPod touch 4. My mom signed into my Apple ID account the other day to get music on her phone and so now all 3 of us have the same Apple ID and iCloud on our devices. Today, there was a message that popped up on my phone about my mom;'s numer (I don't remember what it said) and I clicked no. It then told me that I would use my phone number for iMessage and FaceTime. (That's good!) Well later, I'm assuming my younger sister got the same message on her iPod Touch and I'm also guessing that she said yes. Well now she can see all of my mom's texts and her contacts and she can even text on her iPod through my mom's number. How do we fix this? Do we all go back to our own iCloud's and Apple ID's?

Should I get iPhone 4S or 5?

I don't like the bigger screen but am interested in long battery life because it will doubling as my iPod since my iPod broke. If I get the 4s I'm planning to get ios 6.Is the 5 worth it?

Added (1). And don't tell me to get the Samsung whatever the ***, I want an iphone so shut up.

Why does apple say British English instead of American English?

Why in the language selection tab on my iPhone does it list you can choose 'English' or 'British English' as your phone language. I take it when they say 'English' they mean 'American English'. How cheeky! It should be 'English' or 'American English'. The English language is from England not America, we created it! U cheeky bastards, Americans are very bad for using other people's ideas/objects as their own sometimes it's really irritating! Fakers!

Why won't the speakers on my iphone 4 work?

I just updated my iphone4 to ios 5 and it seemed really cool at first but then i tried listening to music through the speakers on my iphone and nothing would come out, it only works with headphones, help? Also can i get siri with this new update?

Unlocking iPhone 4 s on orange?

How much would it cost to unlock my iPhone i'm taking it to an orange shop tomorrow it was previously on contract from the person I bought it from an I did not know this but was told that an orange shop could unlock it?

How to unlock my iPhone 4 after it locked from trying to download iOS 6?

I have an iPhone 4 and connected it to my HP laptop to sync. The pop up message appeared asking if I wanted to update to iOS 6. I clicked yes. I came back to my computer a few minutes later and there was a message saying an "unknown problem" occurred with the download and didn't work. Now my phone only has the screen with the cord and iTunes symbol. It refuses to reboot whatever I do and iTunes on the computer doesn't recognize when I hook my iPhone to the USB port. I've done searches on line and have yet to see anyone else address this problem. I can't be the only one.

Itunes isn't working or is it just me?

I have a iphone & I downloaded music I had made a playlist on itunes and I'm tyring to get the music to sync onto my phone but it's only syncing a few of the songs? Can someone help me with this? I'm confused.