Samsung SCH-3550 - Manual (Page 56)

'OGTIGPE[ &KCNKPI
You can place calls to 911 even if your phone is locked or
outgoing calls are restricted (see “Lock Mode” on page 58).
As long as you’re within your Home PCS network, 911 can be
dialed.
%CNNKPI
1. Dial .
2. Press .
Note: Even if your account is restricted, you can still dial 911
(as long as you’re within a service area), but no other
emergency numbers.