A cell phone equipped with an all-in-one card is demonstrated as a subway fare payment card at the 13th China Hi-tech Fair held in Shenzhen, Guangdong province, on Nov 17, 2011. A cell phone equipped with this card, which is of the same size as a regular SIM card, can be used for shopping, paying bus and subway fares and checking-in and out at work. [Photo / Xinhua]
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