I recently received a promo code for a game but my MBP that I sync my iPhone with is at the apple store getting fixed. Can I log into my iTunes account on a different computer, redeem the code, and then purchase the game on my iPhone and not get charged? I want to redeem the code soon as I dont want the promo code to expire, and I want to play the game now. If this wont work, does anyone have any other suggestions on how I could redeem the code? Thanks in advance for the help.