I forgot my old passcode , so i reset my phone and now its asking me for my old passcode to update my phone
I can't update my Iphone , because its asking me to put my old passcode in !
If you forget your passcode for your iPhone, if you have erased the Phone in a way that is good, it must not ask you for your old iphone passcode
See this link on how to do that If you forgot your iPhone passcode - Apple Support