These Aren’t Your Dad’s UDIDs
Throw everything you thought you knew about Apple UDIDs out the window. Historically, Apple’s UDIDs have always been a hexadecimal string exactly 40 characters long. Last week, Apple released new hardware. Most notably the iPhone XS, iPhone XS Max, and iPhone XR. On those new devices, they seem to have changed the format of UDIDs. They are now a string of 8 characters, then a hyphen followed by 16 more characters. XXXXXXXX-XXXXXXXXXXXXXXXX