Casio G'zOne Commando User Manual page 107

On the Home screen, touch the Menu key M > Settings >
2.
Location & security.
3.
Scroll the screen up, then touch Install from SD card.
Only the names of certificates that you have not already installed
on your phone are displayed.
4.
Touch the file name of the certificate to install.
5.
If prompted, enter the certificate's password then touch OK.
6.
Enter a name for the certificate then touch OK.
If you have not already set a password for your phone's credential
storage, you will be prompted to enter a password for it twice, then
to touch OK.
For security purposes, the certificate will be deleted from the
microSD card.
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