Acer S510 - Manual (Page 51)

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Managing your SIM cards
If your phone detects a new SIM card, you will be asked to
confirm the preferred SIM to use for each action.
It indicates the following information:
1. The color used for each SIM card and its network name.
2. The preferred SIM for outgoing calls.
3. The preferred SIM for sending messages.
4. The preferred SIM for 3G data.
Tap Change to edit these settings from the SIM Management
screen. You can also access the SIM Management functions
by opening the Application menu and tapping Settings >
SIM management.
SIM Management
Open the Application menu and tap Settings > SIM
management. From this screen, you can:
1. Enable or disable each SIM.
2. Configure each SIM’s name, phone number, display
numbers, and assign a color to each SIM (allowing you to
quickly and easily recognize which SIM is active).
3. Set the default SIM for voice calls, messaging, and data
connection.
4. General settings for each SIM.
Selecting which SIM to use when making a call
If you have set Voice call to Always ask, you will be asked
which SIM to use each time you make call. Enter the number, then tap . A dialog
opens; tap the SIM to use and the call will be connected.