Google 4 Manual Book page 216

have installed yourself, for example in the
process of installing a client certificate.
2. To examine the details of CA certificate,
touch its name.
A scrolling screen displays the details.
3. To remove or disable a CA certificate,
scroll down to the bottom of the de­
tails screen and touch either Disable for
system certificates or Remove for user
certificates.
When you disable a system CA certificate,
the button at the bottom of its details
screen changes to Enable, so you can
enable the certificate again if necessary.
When you remove a user­installed CA cer­
tificate, it is gone permanently and must
be re­installed if you want it back.
4. In the confirmation dialog that appears,
touch OK.
SECURITY SETTINGS 207