I turned on two-step last week, and changed my Apple ID password on Sunday night. Because I changed my password, I obviously had to sign back in to iCloud + iMessage + Facetime + App Store / iTunes on my iPhone, iMac, and iPad. After signing back into iMessage and Facetime on each device I got pop-up messages (as normal) on the other devices, telling that that <device name> had signed in to iMessage/Facetime using my Apple ID's email address. One day later, on Monday night, I had a pop-up notification on my iMac and my iPad telling me that "<my iPhone 5's name> is now using <my Apple ID email address> for iMessage". Normal pop-up you get when you sign back in to iMessage... but a day after the event. I can't remember if I already had the same pop-up at the time I signed in, and this was a repeat, or if this was the first/only pop-up for the iPhone's iMessage. But, being a paranoid numpty (see my other threads ), it made me worry that maybe someone else signed into iMessage on their own device, using my Apple ID. Of course, that would also mean their device has the same name as mine, which also made me worry someone accessed my iCloud backup. However: There are no extra devices in my Support Profile (aside from my old 4S I removed since seeing it there again last week, it's not been there since before the password change though), no extra devices authorised in iTunes, I now use two-step verification, and I changed my password on Sunday night. I also haven't received any emails from Apple saying that iCloud or iMessage or anything else has been activated on any new/other devices using my Apple ID, which AFAIK I would receive if someone had somehow got into my account and used it to sign in on their own device. So, am I just being a crazy fool once again, and this is just Apple's servers taking their time to send the iPhone+iMessage related pop-up, or is there anything for me to once again worry about?