Hello, Sonydn. 

I know it is important to know how to properly sell your device to your friend so that he/she may use it with their account. After making sure the device is completely paid off, please make sure you erase all content and settings on the device and remove it from your iCloud account from your managed devices. You can look at the steps on how to remove it here: http://spr.ly/66081TOLy. Does this help?

AnnaG_VZW