Apple Begins Transition to Randomized Serial Numbers With Purple iPhone 12

MacRumors previously reported about Apple's plan to switch to randomized serial numbers for future products starting in early 2021, and this transition has now started with the new purple iPhone 12 model in multiple countries.

iphone 12 preorder purple
With assistance from Aaron Zollo, host of the YouTube channel ZolloTech, we can confirm that the purple iPhone 12 released last month has a new 10-character serial number format, compared to the usual 12 characters for most other Apple products. Apple previously said its randomized serial numbers would initially be 10 characters long, so the purple iPhone 12 appears to be the first Apple product with a randomized serial number.

The change likely extends to the purple iPhone 12 mini, but we've yet to confirm this. On the contrary, the randomized serial number format does not appear to apply to the AirTag at this time, with multiple MacRumors editors and others we've spoken to still seeing 12-character serial numbers for the item tracking accessory.

It remains to be seen if the new iMac, iPad Pro, and Apple TV have randomized serial numbers when they launch in the second half of May.

In a memo obtained by MacRumors in March, Apple said products already shipping at that time would continue to use the company's previous serial number format, which has for years allowed customers and service providers to determine the date and location that a product was manufactured. The first three characters represent the manufacturing location, the following two characters indicate the year and week of manufacture, and the last four characters reveal a device's model, color, and storage capacity.

The new serial number format will consist of a randomized alphanumeric string of 8-14 characters (10 characters initially) that will no longer include manufacturing or configuration details, according to Apple's memo. Apple advised authorized resellers to prepare for the transition to the new format ahead of its "Spring Loaded" event last month.

Related Forum: iPhone

Popular Stories

Generic iOS 18 Feature Real Mock

iOS 18 Available Now With These 8 New Features For Your iPhone

Sunday September 15, 2024 10:09 am PDT by
Following over three months of beta testing, iOS 18 was finally widely released to the public on Monday, September 16. The update is available in the Settings app under General → Software Update on the iPhone XS and newer. Below, we have highlighted eight key new features included in iOS 18, and Apple shared a complete list of new features and changes last week. Note that Apple...
iOS 18 Public Beta Thumb 1

Here's When iOS 18 Rolls Out Today in Every Time Zone

Monday September 16, 2024 3:56 am PDT by
It's that time of year again. Apple is about to release iOS 18, which promises to bring a range of new features and improvements to iPhones worldwide. It's Apple's biggest software update of the year, and the company is expected to release it sometime today – Monday, September 16. Based on past releases, the update is likely to drop at around 10:00 a.m. Pacific Time/1:00 p.m. Eastern...
M4 Mac mini Black Ortho Cooler

Apple Leaks New Mac Mini With 5 USB-C Ports

Monday September 16, 2024 11:40 am PDT by
Apple has seemingly leaked the rumored next-generation Mac mini with five USB-C ports, according to a code change within Apple software that was discovered today by MacRumors contributor Aaron Perris. The code refers to an unreleased Mac mini model with an Apple silicon chip and five ports, which lines up with a previous report from Bloomberg's Mark Gurman that said the next Mac mini will be ...
apple silicon mac lineup wwdc 2022 feature purple

M4 Macs, New iPad Mini, and iPad 11 Expected at Upcoming Apple Event

Sunday September 15, 2024 5:29 am PDT by
Apple will likely hold another event in October this year to announce new Macs and iPads. If so, it would be the fourth time in the last five years that Apple has held an event in October. Last year, Apple held a virtual event on Monday, October 30 to announce new MacBook Pro and iMac models with the M3 series of chips. In his Power On newsletter today, Bloomberg's Mark Gurman reiterated...
16 pro

iPhone 16 Pro Demand Has Been Lower Than Expected, Analyst Says

Sunday September 15, 2024 3:58 pm PDT by
Apple analyst Ming-Chi Kuo today said demand for the iPhone 16 Pro and iPhone 16 Pro Max has been "lower than expected" since the devices became available to pre-order in the U.S. and dozens of other countries on Friday. Kuo said his data is based on a "supply chain survey" and shipping estimates listed on Apple's online store. Kuo estimated that sales of all four iPhone 16 models reached...
m4 iPad Pro Horizontal Feature Purple and Blue

Apple Pulls iPadOS 18 for M4 iPad Pro After Bricking Complaints [Updated]

Tuesday September 17, 2024 11:24 am PDT by
Apple stopped signing the iPadOS 18 update for the M4 iPad Pro models, which means the new software is no longer available to be downloaded and installed at the current time. The update appears to have been pulled following complaints from some iPad Pro owners, who found that the update bricked their devices. There are reports on Reddit from iPad Pro users who had an interruption in the...

Top Rated Comments

Xenomorph Avatar
44 months ago
So it's not a serial number, then.

Serial means in series. Randomizing a number by definition means it cannot be in series, so it's not a serial number.
Score: 45 Votes (Like | Disagree)
Eorlas Avatar
44 months ago
is there a particular reason for this transition? as in, if apple didnt want people to discern that info off a s/n, what is the need to obscure it?
Score: 21 Votes (Like | Disagree)
usagora Avatar
44 months ago

So it's not a serial number, then.

Serial means in series. Randomizing a number by definition means it cannot be in series, so it's not a serial number.
I'm guessing it technically IS a serial number, just "encrypted."
Score: 17 Votes (Like | Disagree)
pgiguere1 Avatar
44 months ago

So it's not a serial number, then.

Serial means in series. Randomizing a number by definition means it cannot be in series, so it's not a serial number.
Ackchyually...

The new serial numbers aren't truly random. They're generated using a complex pseudo-random deterministic function, for which the input is a series.

In general, computers don't produce true randomness, they try to approximate it, so this is true in many cases outside of Apple.

So, instead of being a conventional series like 1, 2, 3, 4..., it's a series of functions like f(1), f(2), f(3), f(4)..., which I think is still fair to call a series.

Edit: I saw someone refer to it as "still a serial number, but encrypted". This is kind of what they're doing indeed. True randomness on the other hand would not be decryptable. I am not sure if the current format is actually encrypted though (implying the function is bijective), or if it just outputs a hash.
Score: 11 Votes (Like | Disagree)
subi257 Avatar
44 months ago

So it's not a serial number, then.

Serial means in series. Randomizing a number by definition means it cannot be in series, so it's not a serial number.
That is completely true....I love logic.
Score: 11 Votes (Like | Disagree)
_Spinn_ Avatar
44 months ago

I'm guessing it technically IS a serial number, just "encrypted."
That would actually be a clever way to keep the serial number meaningful to Apple but useless to everyone else.
Score: 8 Votes (Like | Disagree)