1. Know how to use: if you have a smart phone machine and want to use the good features of it, please make sure that you get acquainted and learn how to use it. No matter how full of surfing the Internet,Resize images, videos, as appropriate, all of this is on the Youtube don't miss to learn, and learn to use a
2. Know how: MuteIf you learn the 1 successfully. Don't forget to see how close the sound your phone. It is very strange that most people use a smartphone that don't know how to turn off the sound. It would be good if you already meeting smartphone rings."Smart" and perhaps
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3. Learn etiquette, Propriety: or whatever, you name it. Nobody wants to hear you talk on the phone. Trust me!Avoiding telephone in public, such as in a movie theater, hospital, restaurant, and ่ๆ. There were too many people, if I have to answer it would be better if you leave the phone outside
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