1, GSM 2G: (such as mobile, China Unicom 2G card) not need jailbreak Plug and Play, normal.
2, WCDMA: (such as China Unicom 3G card) jailbreak and adding a patch.
3, CDMA: (such as telecommunications card) can not be used.

After jailbreak, you cad add the third network patch by the following steps.

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