You can select which network modes (3G and/or GSM) your mobile phone can use. Your choice depends on the data speed you can achieve.
Tap the Menu key.
Scroll to Tools and tap the Navigation key.
Scroll to Settings and tap the Navigation key.
Scroll to Phone and tap the Navigation key.
Scroll to Network and tap the Navigation key.
Scroll to Network mode and tap the Navigation key.
Highlight Dual mode, UMTS or GSM and tap the Navigation key.
Tap the Menu key to return to standby mode.
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