Dear 志宇 鄭,
Your Apple ID (zxc0983227937@gmail.com) was used to sign in to FaceTime and iMessage on an iPhone 6s named “iPhone”.
Date and Time: 11 December 2015, 9:52 AM
Operating System: iOS 9.2
If the information above looks familiar, you can disregard this email.
If you have not recently signed in to an iPhone 6s with your Apple ID and believe someone may have accessed your account, go to Apple ID (https://appleid.apple.com) and change your password as soon as possible.
Sincerely,
Apple Support