Sony 1239-7457 User Manual
Data traffic
Turning off data traffic
You can disable all data connections over 2G/3G networks with your phone to avoid any
unwanted data downloads and synchronizations. Contact your service provider if you need
detailed information about your subscription plan and data traffic costs.
When data traffic is turned off, you can still use Wi-Fi™ and Bluetooth™ connections. You can
also send and receive multimedia messages.
To turn off all data traffic
1
From the Home screen, drag upwards.
2
Find and tap Settings > Wireless & networks > Mobile networks.
3
Unmark the Data traffic checkbox.
Data roaming
Depending on your network operator, it might be possible to allow mobile data connections
via 2G/3G outside of your home network (roaming). Please note that data transmission
charges may apply. Contact your network operator for more information.
Applications may sometimes use the Internet connection in your home network without any
notification, for example, when sending search and synchronization requests. Additional charges
may apply for data roaming. Consult your service provider.
To activate data roaming
1
From the Home screen, drag upwards.
2
Find and tap Settings > Wireless & networks > Mobile networks.
3
Mark the Data roaming checkbox.
You cannot activate data roaming when data traffic is turned off.
Network settings
Your phone automatically switches between networks depending on availability. Some
network operators allow you to switch networks manually, for example, if you are travelling
abroad and want to use a particular network.
To save battery, you can limit your phone to only use GSM networks. Data downloads and
To save battery, you can limit your phone to only use GSM networks. Data downloads and
uploads will however be slower. If you are going to download or upload large amounts of
data, we recommend that you change to another network mode or connect to the Internet
through a Wi-Fi® network.
To use GSM networks only
1
From the Home screen, drag upward.
2
Find and tap Settings > Wireless & networks > Mobile networks.
3
Tap Network Mode.
4
Select GSM only.
To select another network manually
1
From the Home screen, drag upwards.
2
Find and tap Settings > Wireless & networks > Mobile networks > Network
operators.
3
Tap Search mode.
4
When a popup window appears, tap Select manually.
5
Select a network.
If you select a network manually, your phone will not search for other network, even if you move
out of range of the manually selected network.
29
This is an Internet version of this publication. © Print only for private use.