Iphone passcode 4 to 6 digits.
Hi, 2 years ago when I lost my iphone 6s, I purchased a new iphone and turn on Find my iphone on the lost mode for the lost iphone .
At that time , i need to key in 4 digits passcode to lock the lost iphone.
Recently when I found the lost iphone, it asked for 6 digits passcode to unlock .
How to unlock ? Because i know only 4 digits passcode that i set 2 years ago.