It may not seem like it when commuters are shouting down their cell phones to the dismay of other passengers but most Americans believe there are unspoken rules about mobile phone etiquette .

在上下班的路上打手机声音太大把别人吓到，你可能难以相信，但大多数美国人认为使用手机还是有一些不成文的礼节。

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That 92% of Americans who wish that people used better etiquette with their mobile devices?

92%的美国人希望大家的手机礼仪可以有所改善。

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The analysis of text messages shows that people are developing their own "etiquette" in what is acceptable between mobile phone users.

BBC: Men and women have developed identities for sending texts