a few days ago , I saw a superman with a cell phone. she text a message quickly. her thumb of right hand touched the phone screen  ceaselessly ,fast and accurate. and the thumb of left hand chosen the word. her hands  were perfect matched. I am very appreciate her action. nowadays, It is very usually that everyone holds one or two cell phone,but how you bring into play their performance.

If you hold a Iphone 4 and only dialed  a telephone with it , it's a ordinary phone .although its performance very super strong.