How to not let imessages on iphone be sent to other devices?

I have icloud on both my dads and my iPhone and every time i get an imeesage it gets sent to my dads phone. Is there away to stop my messages going to him without turning of imessage i tried deleting the icloud account on his device but it still works do i have to make another iTunes account or something.

Deleted iPhone contacts still there?

I deleted contacts directly from the "contacts" section of my iPhone, however, when I use apps like GroupMe or WhatsApp, the deleted contacts still show up in my "contacts" tab in the app. Also when I compose a new text message, if I type the deleted person's name in the "To:" section, their name and number still pops up. Any idea how to permanently delete someone's number off of your phone so this won't happen?

Where is Siri on my iphone 4S?

I went to my general settings then to restrictions and it says she's on. So where is she? I tried holding the home button and voice control is what pops up.

What is the other in the iTunes memory?

When syncing an iPhone or iPod, you can select to see how much memory you are taking up. I, for instance, have used 5.34 GB in music, 474.9 MB in videos, 1.41 GB in photos, and 1.94 GB in apps. On top of that, though, it says I have used 1.46 GB in "other".

What falls into that category, exactly? Is there a way to minimize the amount of "other"? I'd like to be able to utilize more of my memory but I don't know what the "other" comes from so I'm unsure what to do about it.

Is the iPhone 6 coming out soon?

So I just got the iPhone 5 last week and I'm pretty pissed off that there's going to be a iPhone 6 soon. I'm not sure if its just a rumor but I hope so. Also I have a 3 year contract with Rogers so if the iPhone 6 comes out can i just keep the contract and pay money for the iPhone 6 without cancelling the contract or do I have to cancel the contract and make a new one. Please tell me!

I cracked the back of my Iphone 4, help on what to do?

So I always have a case on my iphone 4. I got a phone case back in August, I put it on, and since then I had never taken it off. But today, I thought that I'd take off the case just to take it off because I was bored. So I took it off and realized the back of my Iphone 4 is cracked! I had no idea at all whatsoever it was cracked before today. I don't know when it happened, where it happened, or how it happened. For all I know it could've happened months ago. What I mainly mean to ask, is do you think that I can just keep the case on it and it will just work fine? I bought this phone with all my own money, and my parents would KILL me if they found out. My plan was to just leave it in the case, and if for some reason they'd ever look in the back I could just say I've never seen it. What do you guys suggest that I do?

Added (1). Also, if I put tape on it and my parents ever were to see it, they would know that I've seen it. So do you think my phone case would work the same way that tape does?

Added (2). They would mainly be mad because I spent all my birthday money and refunded gifts in order to but the phone, and they know I have it. I was just reading an article that says slide on iphone 4 cases crack the back of screens, and I have never dropped my iphone 4, so I think that's my problem.