Samsung SPH-M610DAASPR - Manual (Page 240)

214 Section 3A: Sprint PCS Service Features: The Basics
Making a Three-Way Call
With Three-Way Calling, you can talk to two people at the
same time. When using this feature, the normal airtime rates
will be charged for each of the two calls.
To make a Three-Way Call:
1. Enter a number you wish to call and press .
2. Once you have established the connection, enter the
second number you wish to call and press . (This
puts the first caller on hold and dials the second
number.)
3. When you’re connected to the second party, press
again to begin your three-way call.
If one of the people you called hangs up during your call, you
and the remaining caller stay connected. If you initiated the
call and are the first to hang up, all other callers are
disconnected.
Note: Call Waiting and Three-Way Calling are not available while
roaming off the Nationwide Sprint PCS Network.