Is it possible to connect different devices with iCloud, but exclude one of them?

My Apple ID is used for my laptop, my iPod, and will be for my iPhone once I get it at the end of the month. A month ago my mother purchased an iPhone and I let her use my Apple ID to make it easier for her and what not. I'm interested in using iCloud for my laptop, iPod, etc. But I don't want it to connect to my mother's iPhone. Is it possible to make sure our things don't go to each others devices? Or if I don't fully comprehend it, could someone explain it to me?

Why is straight talk not working in my zip code?

I bought an ATT iPhone 4s and a micro sim card from straight talk that was compatible with this phone. I activated it, and it says "no service." I've heard that straight talk uses ATT towers, and they work fine in our area. So what is the problem?

How to get contact names to display for text messages on iPhone 4s

It's weird because most f my contacts are displayed by their names except for a few who are in my phone book but come up as their phone numbers and it's kind of annoying since its hard to distinguish who is who. Could this have something to do with the fact that i'm using the factory unlocked iPhone 4s with tmobile? Anyone know how/if this is fixable? I already tried to delete the numbers and save them different ways on mh contacts but it still does it:/

Can I use siri on a iPhone 4s without data? Or on Wi-Fi?

I don't have a iPhone yet but I would like to purchase one for features like siri but I don't know anymore because of the fact of how much data you use for these apps! I would like to know if I can use Siri without data basically, thanks so much!

How to listen to music on my iphone in the car?

My car doesn't have a cassette player and it also doesn't have an input to directly plug it in with a cord. Is there anything else I can do? I heard something about and FM transmitter but I heard that the music will be covered with static.