Samsung SGH-S275DAATFN - Manual (Page 41)

Call Functions 36
Switching off the Microphone (Mute)
During a call, you can temporarily switch your phone microphone off
so that the other person cannot hear you.
Ⅲ Press
(Mute) to mute the microphone and keep callers
from hearing you. The entry then shows Unmute.
– or –
Press (Unmute) to rea-activate the microphone and
allow callers to hear you. The entry then shows Mute.
Searching for a Number in Address Book
During an active call you can search for a number from the Contacts
list.
1. During an active call, press (Options) and select
Contacts.
2. Highlight the Contact list entry.
– or –
Enter the first few letters of the contact into the Search field to
display then select the closest match.
3. With an entry highlighted, press (View) or to view
your selected contact.