Following China Telecom and China Mobile, China Unicom has now become the last of the big three Chinese operators to begin trials of its 3G network -- christened "Wo" -- with some 55 test markets lighting up this week. Happily, the trials are purely UMTS / HSPA, which means you won't need a pesky, proprietary TD-SCDMA handset to take advantage; unfortunately, though, regular commercial service won't begin until the end of the year. In the meantime, Unicom is expecting an expansion in the September time frame that would see the high-speed service expand to some 284 cities.

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China Unicom gets rolling with 3G trials