My aunt gave me her old Iphone 5c, when AT&T bought Alltel, she got a new AT&T Iphone 5c and gave me her old Alltel Iphone 5c. I want to use the Alltel Iphone 5c on Straight talk. I bought the BYOP kit, but I still need to have the phone unlocked so that it will work. Is there a way to do this that is reliable and cost effective?

She can get her airtime provider to unlock it for her.