How do you use 'fake a call' on a Samsung E2100B?
When the keys are locked (press and hold * to lock keys if
unlocked) press the down key 4 times, you'll see a message saying
"Fake call activated" and the option to cancel the fake call. After
a set amount of time (which you can set through OK for Menu > 9
for Settings > 6 for Application > 6 for Fake Call > 2 for
Fake Call Timer, you can even record a conversation for your fake
call!) the phone will ring from "Unknown" I don't think there's a
way to set a number from which your fake call comes from (probably
a bad idea)