I am in the Galaxy forever program. I am trading in my S8+ for the Note 8 which I got on release day. It hasn't even been 6 months. I had to pay about $280 to upgrade early. Basically you half to have paid half of the phone price in order to upgrade, i.e. 12 of your 24 month payments. When you go on their website, log onto your account, then go to the shop section, check you want to upgrade current device, it will automatically tell you there if you have a balance on your lease to pay off before an upgrade or if you are eligible now.