Huawei C6110 User Manual page 20

mute/unmute the ringtone.
Voice encryption: to set the privacy mode, including Standard and
Enhanced.
End: to end the call.
Save Number: to enter a phone number and save it to the phonebook.
Others: to access the Contacts, Messages, or Memo screen.
During a call, you can press
Messages, or Memo, and enable or disable the speaker.
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to select and access Contacts,