UTStarcom PN-820 - Manual (Page 87)

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SECURITY
DELETE A CERTIFICATE
Be careful when deleting certificates: select only the certificate you
intend to delete. Root certificates should only be deleted when you are
certain you do not need that security on the phone.
1 From the Home screen, press the left soft key <
[Start].
2 Select Settings and press O [OK].
3 Scroll to Security and press O [OK].
4 Select Certificates and press O [OK].
5 Choose one of the following:
6 Personal to view the list of personal certificates.
7 Root to view the list of root certificates.
8 Select a certificate.
9 Press [Menu], then Delete.
Deleting a root certificate can make it impossible to use
Secure Sockets Layer (SSL) protocols, which help you to send
personal information more securely.