Samsung Galaxy S Blaze 4G User Manual page 219

Tap Data roaming again to remove the green check mark
and deactivate the feature.
Access Point Names
To access a wireless access point:
Press
Wireless and network
Names. A list of the Access point names display. The active
access point displays a bright green, filled circle to the
right of the name.
Network mode
You can configure your phone to either manually detect and use
either a 2G (GSM) or 3G (WCDMA) data network connection.
Press
Wireless and network
Mode.
Using the 4G Network
To confirm you are always using the fastest possible connection,
the phone has an automatic detection method where it finds both
the fastest and most stable connection/communication method.
This phone is capable of using either 4G/3G services for this
connection.
and then tap (Settings)
Mobile networks Access Point
and then tap (Settings)
Mobile networks Network
Note: WCDMA is only available on the 4G network.
1. Press
Wireless and network
Mode.
Tap GSM/WCDMA (Auto mode). A check mark displays next
2.
to this option to indicate that it is active. This is the default
mode for this phone.
Using the 2G (EDGE) Network
If you are not using applications that require the 3G network
speed (any application that accesses the network or uses a
browser), using the 2G network saves battery life.
Press
1.
Wireless and network
mode.
Tap GSM only. A check mark displays next to this option to
2.
indicate that it is active.
Note: Connecting to 2G networks slows the data transfer speed and time.
and then tap (Settings)
Mobile networks Network
and then tap (Settings)
Mobile networks Network
Changing Your Settings 215