How to unsync iPhone from PC?

This is what comes up is there any setting to change this as I have never had this PC and don't know who's it is I want it to connect to my laptop but it can't without this setting being erased.How to unsync iPhone from PC

Iphone 6 t-mobile free-contract?

Hey guys I'm from Kuwait and I'm traveling to colorado, usa to study there. I'm buying the iphone 6 in 28-29 sept. And I want to ask some questions about this t-mobile free-contract. So lets say if I buy it and I got it. What will come with the device? A t-mobile sim-card? And if yes. Can I change the sim card and use at&t sim card? Will it works? Or it must work in t-mobile sim card only? And if I traveled back to my country can I use sim card from Kuwait and will work?

and I what about the company it self? Is it good? My brother told me that it has bad service? Really?

How to recover lost data in Iphone during upgrading?

I lost my data during upgrading. My little cousin accidentally took out the USB out of the computer while I'm upgrading. What is the easiest way to recover and I don't even know if I PRESS BACK UP before that. I don't know if it's still possible but I'm hoping.

Just updated to iOS 8, iMessage and FaceTime not activating?

I own an iPhone 4s and recently updated my phone to iOS 8. Before, I was able to freely iMessage and FaceTime people without any problems. After updating, I'm now not able to activate my iMessage or FaceTime at all. When turning on the iMessage, it always returns to the "Unable to Activate, turn on iMessage to try again." I have tried everything I could find to get this to work yet none of them are specifically for iOS 8 and they are not working. I have even restored my phone, reset the network settings, and many other supposed "solutions" due to my desperation. I just logged out of my Apple ID for iMessage and now it is simply stuck on the "Waiting for Activation" Advice?

How to delete a saved weather location?

I don't have a delete option for my weather app on my iPhone and I have Sydney saved three times and I would like to remove two of them so how can I do that when deleting them isn't all that easyHow to delete a saved weather location