Competition between China's top two mobile telcos, China Mobile and China Unicom, is ferocious. But Unicom – ever the underdog – is fighting back. Its resolution is this cunning SIM card sticker that allows users to use both networks at the same time.
It is a plastic film with a chip on top, which you can stick to your original SIM card and have them both work: voice with the original, and 3G with the SIM card sticker. In this way, you don't have to compromise between 3G and voice quality.
Read more: TechInAsia
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