How to disconnect 2 iphones that are connected to the same itunes?

My dad and I both have iphones and they are connected to the same iTunes. For that reason, he gets all of my texts and I get all of his. Also, whenever either of us downloads anything, the other one gets it. How do we stop this?

You can reset your phone from the settings app. If you choose reset in the general tab it takes your phone back to defaults like its new only with the latest os you currently have but you will loose everything currently on it.

Or you can simply go to the apple account in the settings app and change it to yours but every time any apps you had loaded under your dads updates come through you will need to use his password to update it and if you sync with iTunes on your computer you will have issues on any apps that don't belong to your Apple ID.