Blackberry activation required

How to remove ACTIVATION REQUIRED message
To remove the Activation Required, you need to get the 6-Digit MSL Code from Sprint. Then enter ##XXXXXX (where the 6Xs represent the MSL code). If the correct MSL code is entered, you will be taken to a screen where the top says, Mobile Directory Number. Change it to your 10 digit cell #, then press Menu, close and it will reset your fone & reboot and when the screen is back, you will see the name of your GSM provider and My Number will now show your cell number and you are good to go .