Connect to a GSM or UMTS network

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If your BlackBerry® device normally connects to a CDMA network and your device supports international roaming, you might need to get a SIM card that is set up for international roaming from your wireless service provider.

Insert a SIM card into your device. For more information about inserting a SIM card, see the printed documentation that came with your device.
In the dialog box that appears, click Yes.

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Connect to a GSM or UMTS network