Casio verizon User Manual page 94

Configuring system select
You can set your phone to search or roam for another network when
you are not in your carrier's range.
Leave this setting as default unless you want to alter the system
selection as instructed by your service provider.
1.
From the Home screen, tap the Menu key
Mobile networks > System select.
2.
Tap one of the following:
Home only: Only within your home area or affiliated area.
Automatic: Scan for signal automatically.
Configuring network mode
You can set the network mode manually.
1.
From the Home screen, tap the Menu key
Mobile networks > Network Mode.
2.
Tap Global, GSM/WCDMA or LTE/CDMA.
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