a. Have your 16 digit CELCOM PIN reload available with you
b. Type on your HP's MENU screen
*122*16DigitPin#
c. Press "CALL"
d. You will get a message that the reload is succesfull. If you get an error message, try to reset you handphone by switching it OFF and ON again.
e. Check you balance by using this command at MENU screen and press CALL.
*124#