thank you juwaack68 !!
the problem was solved after I tried to remove the "Activation Required" which was displayed instead of the name of the crier on the top of my home screen.
just for the record if anyone is having the same problem, here's how to remove it :
a-(if yours is Verizon)
1) (from the home screen) enter ##111111 or ##000000
2) Press the Enter button
3) Go in and change the two 10 digit numbers to something else such as your number, it doesn't really matter. -DONT CHANGE ANY OTHER NUMBERS
4) Press the blackberry menu button, select save and your good to go. The phone will reset and the initial programming needed line should be gone.
(with big thanx for intentfire from crackberry.com) link:
Removal of "Activation Required" from Sprint Tour - BlackBerry Forums at CrackBerry.com
b-(if yours is Sprint)
Follow the steps shown in this link :
"activation required" on unlocked 9530(Verizon)...is there an easy fix?? - BlackBerry Forums at CrackBerry.com