DO'S
- Only chat with people on your friend list
- Mute your smartphone or specific group in your IM apps when you are sleeping so as to prevent someone disturb your sleeping time.
DON'TS
- Do not provide any sensitive information about your such as credit card number, ID number, address in order to prevent hacker obtain your information
- Do not chat and meet with any unfamiliar people who added you in IM
- Do not send any message at midnight unless it is urgently because many people never unconnected WiFi or cellular data.
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