If you have one of those cantel at&t phones if you press #0000# you can block your number
at no extra charge.
New Menu on Emergency Calls *3001#12345#
Brings a new menu that gives you access to the emergency calls ( 911 Etc. ). It will give you FREE calls. (only the ones you put in the emergency. )
This option will depend on your GSM operator
Your number in your display
Goto menu 3-7 Call cost settings.
Turn ON the Call costs limit 3-7-1. PIN2 code Required.
Put in the limit with the phone number.
eg. my phone # is 019 2184697
Enter the limit as 2184697
Goto menu 3-7-2 Show costs in. PIN2 code Required.
Select Currency.
Enter Unit price - 1
Enter Currency name as 019 (per my phone # eg. above)
Now the phone number 019 2184697 will remains on the 4th row of the display.
Secondly, if you press the # key, it prompt which line to be used. Line 1 or 2.