launch of the iPhone 3GS in 2009 remains about the same 3 g screen design. Upgrade to cấpcủa iPhone 3GS is the microprocessor and RAM. the iPhone 3GS has reached 600 MHz processors, 1.5 times the power the iPhone 3 g. A further special feature is the ability to voice control by pressing the Home button hold. The price of the iPhone 3GS time launches iPhone 3GS 16 GB version priced at $199, 32 GB version is $299.
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