Arizona Attorney General Leading Multi-State Probe on Apple iPhone Throttling

Apple is facing another probe on its iPhone "throttling" practices, this time from Arizona attorney general Mark Brnovich, reports Reuters.

iphone 6s battery
The probe, which may also involve Texas, has been ongoing since October 2018 and is attempting to determine whether Apple's deliberate slowing of older iPhones "violated deceptive trade practice laws."

Last week, reports suggested that Texas was involved in an investigation aiming to determine whether Apple deceived customers, though no other information was available at the time. It's likely that the probe in Arizona is linked to the Texas report, with both states looking into Apple's 2017 ‌iPhone‌ slowdown practices.

As many MacRumors readers know, Apple in iOS 10.2.1 (which was released in early 2017) introduced a performance management system designed to eliminate unexpected shutdowns by throttling the maximum performance of iPhones with chemically aged batteries.

Apple did not disclose how its power management system worked, leading to customer outrage when it was discovered ‌iPhone‌ performance was being downgraded. Apple said that this was to make sure that the ‌iPhone‌ lasted as long as possible, even as the battery failed.

After it was discovered that Apple was limiting ‌iPhone‌ performance, Apple apologized and ultimately launched a battery replacement program that saw the company offering replacement batteries for older devices for $29. Replacing a failing battery successfully resolves the problem that leads to shutdowns, which is why power was limited by Apple in the first place.

In addition to offering low-cost battery replacements for a year, Apple has also agreed to pay up to $500 million to settle a class action lawsuit over the issue.

Apple's performance management system is now disabled by default and it turns on only if an ‌iPhone‌ suffers an unexpected shutdown. Even then, it can be disabled, and Apple also provides much more detailed information on battery health so customers can opt for a replacement when necessary.

Popular Stories

Apple Logo Zoomed

Tim Cook Teases Plans for Apple's Upcoming 50th Anniversary

Thursday February 5, 2026 12:54 pm PST by
Apple turns 50 this year, and its CEO Tim Cook has promised to celebrate the milestone. The big day falls on April 1, 2026. "I've been unusually reflective lately about Apple because we have been working on what do we do to mark this moment," Cook told employees today, according to Bloomberg's Mark Gurman. "When you really stop and pause and think about the last 50 years, it makes your heart ...
wwdc sans text feature

Apple Rumored to Announce New Product on February 19

Thursday February 5, 2026 12:22 pm PST by
Apple plans to announce the iPhone 17e on Thursday, February 19, according to Macwelt, the German equivalent of Macworld. The report, citing industry sources, is available in English on Macworld. Apple announced the iPhone 16e on Wednesday, February 19 last year, so the iPhone 17e would be unveiled exactly one year later if this rumor is accurate. It is quite uncommon for Apple to unveil...
Finder Siri Feature

Why Apple's iOS 26.4 Siri Upgrade Will Be Bigger Than Originally Promised

Friday February 6, 2026 3:06 pm PST by
In the iOS 26.4 update that's coming this spring, Apple will introduce a new version of Siri that's going to overhaul how we interact with the personal assistant and what it's able to do. The iOS 26.4 version of Siri won't work like ChatGPT or Claude, but it will rely on large language models (LLMs) and has been updated from the ground up. Upgraded Architecture The next-generation...
iOS 26

iOS 26.3 and iOS 26.4 Will Add These New Features to Your iPhone

Tuesday February 3, 2026 7:47 am PST by
While the iOS 26.3 Release Candidate is now available ahead of a public release, the first iOS 26.4 beta is likely still at least a week away. Following beta testing, iOS 26.4 will likely be released to the general public in March or April. Below, we have recapped known or rumored iOS 26.3 and iOS 26.4 features so far. iOS 26.3 iPhone to Android Transfer Tool iOS 26.3 makes it easier...
iphone 17 pro dark blue 1

iPhone 18 Pro Max Rumored to Deliver Next-Level Battery Life

Friday February 6, 2026 5:14 am PST by
The iPhone 18 Pro Max will feature a bigger battery for continued best-in-class battery life, according to a known Weibo leaker. Citing supply chain information, the Weibo user known as "Digital Chat Station" said that the iPhone 18 Pro Max will have a battery capacity of 5,100 to 5,200 mAh. Combined with the efficiency improvements of the A20 Pro chip, made with TSMC's 2nm process, the...

Top Rated Comments

macbookfan Avatar
72 months ago
Consumer: My old phone shuts off randomly when I’m using it.
Apple: here have a free software update that keeps your phone on.
Consumer: Apple slowed down my phone!

No matter what someone is always not happy.
Score: 16 Votes (Like | Disagree)
2010mini Avatar
72 months ago

Do you accept apples apology?
for fixing a problem of iPhones shutting down during use? The only thing they did wrong was not shout it from the hills. All this info was in the description of the iOS update.
Score: 13 Votes (Like | Disagree)
BigMcGuire Avatar
72 months ago
This just wasn't aged batteries. I tell my experience every time these threads come up:


My wife and I have the same phones, we buy them at the same time - the same phones, and use them for a few years then upgrade.

Our 6s+ phones started out identical... and less than 3 months into ownership, my wife's 6s+ would last significantly less than my 6s+ with near identical usage (walking in the park doing Ingress). It was about 4-5 months in that her phone started shutting off during high usage events (such as Ingress, Facebook, etc).

6 months into ownership her phone would restart handfuls of times on a mile walk in the park. All the while her battery life was 3x worse. CoconutBattery would show capacity at 40%, 60%, 80%, randomly depending on when I'd measure.

We took it to the Apple Store only for her phone to repeatedly fail the diagnostic test but the tech, frustrated, threw up his hands and said: "Sorry, I can't help you, her battery is green."

So we paid, out of pocket, for the $80 battery replacement which solved all her problems.

Granted, Apple refunded $55 of that... but ... there were CLEARLY a batch of bad batteries that went out and Apple tried to mitigate it by lowering CPU voltage to help reduce rebooting.
Score: 12 Votes (Like | Disagree)
lkalliance Avatar
72 months ago

for fixing a problem of iPhones shutting down during use? The only thing they did wrong was not shout it from the hills. All this info was in the description of the iOS update.
Anecdotally, that's not the only thing it did wrong. SUPPOSEDLY many people would go into an Apple Store complaining of a slowing phone and were directed by Apple staff that the way to fix that was to get a new phone. Anecdotal evidence is problematic. Is that what was really recommended? Did the sales staff perhaps mention a battery replacement but the buyer shrugged it off? We don't know. Just that anecdotally, Apple not only didn't mention the feature but used its invisibility to turn people to the more expensive(/profitable) fix.

For what it's worth.


ADDED: It's also quite possible that the Apple Store clerks were also not aware of the feature (it was hidden, after all), and so directing users to consider a new phone would be the appropriate thing to suggest...which doesn't remove the issue at all, just kicks it further up the chain of command.
Score: 9 Votes (Like | Disagree)
kiranmk2 Avatar
72 months ago
Apple definitely hid this - if it was accurately described in the update notes then tech sites would have featured it at the time and listed a battery replacement as a way to maintain speed. The fact that the tech sites were as surprised as anyone when the story broke tells a big story.

I don't think Apple did anything wrong by doing change, but they did do wrong by not telling people this was how iOS worked - as mentioned above, lots of people probably upgraded to new phones completely unaware that a $79 option would make their device speedy again.
Score: 9 Votes (Like | Disagree)
luvbug Avatar
72 months ago
More politicians looking for publicity, nothing more. That's all that seems to matter anymore.
Score: 8 Votes (Like | Disagree)