Encrypt your device or memory card to
prevent outsiders from accessing your
important information.
Encrypt device memory or memory
card
To encrypt the device memory, select
Phone memory.
To encrypt the memory card, select
Memory card and from the following:
Encrypt without saving key — Encrypt
the memory card without saving the
encryption key. If you select this option,
you cannot use the memory card in
other devices, and if you restore factory
settings, you cannot decrypt the
memory card.
Encrypt and save key — Encrypt the
memory card and save the key manually
in the default folder. For security, store
the key to a safe place outside the
device. For example, you can send the
key to your computer. Enter a pass
phrase for the key and a name for the
key file. The pass phrase should be long
and complex.
Encrypt with restored key — Encrypt
the memory card with a key you have
received. Select the key file, and enter
the pass phrase.
Decrypt device memory or memory
card
Always remember to decrypt the device
memory and/or the memory card
before updating the device software.
To decrypt the device memory, select
Phone memory.
To decrypt the memory card without
destroying the encryption key, select
Memory card > Decrypt.
To decrypt the memory card and destroy
the encryption key, select Memory
card > Decrypt and turn off
encryption.
Fixed dialling
Select Menu > Contacts and
Options > SIM numbers > Fixed dial
contacts.
With the fixed dialling service, you can
restrict calls from your device to certain
phone numbers. Not all SIM cards
support the fixed dialling service. For
138 Security and data management
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