I have 3 devices setup with iCloud, iPad Air, 4s, and 5s. Five days ago I notice another device in iCloud tabs. I didn't think anything of it until 2 days ago a pic showed up in my photo stream. I then called Apple and they instructed me to log into iCloud and see if the device was in Find My iPhone app. Sure enough there was another phone there located in China. Their explanation of why this happened was Apple ID's might be similar and that person logged into my account on accident because nothing that I know of was compromise. They also told me to delete that devise and change my password. I went one step further and remote erase the phone first. So my question is what happened? Didn't someone hacked into my account and didn't do anything? Or what could they have done that I haven't realize yet? I know they probably saw all my photos and my Safari tabs. And would this be a possibility too? They cloned my phone and needed my Apple ID to activate it??