Consider Cingular Wireless with a World phone (Motorola V551, V3 RZR, Sony Ericsson 710A for example. Feel free to compare other carriers but insist on GSM technolgy if you are travelling to Shanghai.
Could anyone recommend a cellular service for use primarily in the Philadelphia region that could also be used in Shanghai? (I plan to be be in Shanghai for about 2 weeks every two months....) Thank you for your input.

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