Look in the thread where People have posted their PIN on this website as well as Howard Forums because some of those users have the 7100i and they can help you with that. You can also check this in an online manual as well. Or go to the local carrier store and check out a model there as well and ask the sales rep. Do a comparison of your current phone and the 7100i on
www.phonescoop.com, which could possible reveal the answer there as well.