Supreme Court Rules Police Need Warrants to Obtain a User's Smartphone Location Data - MacRumors
Skip to Content

Supreme Court Rules Police Need Warrants to Obtain a User's Smartphone Location Data

The United States Supreme Court today ruled that the government "is required" to obtain a warrant if it wants to gain access to data found on a civilian's smartphone, but only when it's related to the user's location data (via The New York Times).

United States Supreme Court Building


The decision is expected to have major implications for digital privacy moving forward as it pertains to legal cases, and could cause ripples in unlawful search and seizure cases that involve personal information held by companies like emails, texts, internet searches, bank records, and more.

In a major statement on privacy in the digital age, the Supreme Court ruled on Friday that the government generally needs a warrant to collect troves of location data about the customers of cellphone companies.

But Chief Justice John G. Roberts Jr., writing for the majority, said the decision was limited. “We hold only that a warrant is required in the rare case where the suspect has a legitimate privacy interest in records held by a third party,” the chief justice wrote. The court’s four more liberal justices joined his opinion.

Today's vote in the case Carpenter v. United States came down to a 5-4 ruling, and originally emerged from armed robberies of Radio Shacks and other stores in Detroit dating back to 2010.

In the case, prosecutors relied on "months of records" obtained from smartphone makers to help prove their case, ultimately showing communication between Timothy Ivory Carpenter outside of a robbery location -- with his smartphone nearby -- and his accomplices inside of the location. The companies reportedly turned over 127 days' worth of Carpenter's records, with information as specific as whether or not he slept at home on any given night or if he went to church on Sunday mornings.

This led to the question by the Supreme Court justices as to whether the prosecutors violated the Fourth Amendment in discovering so much data on Carpenter's movements. Now, police will have to receive a warrant issued by the court in order to obtain any smartphone data as it relates to the owner's location data.

As the case continued, Apple and other technology companies filed a brief in August 2017 arguing against "rigid analog-era" Fourth Amendment rules. The brief deliberately stayed neutral on the topic of choosing sides, but urged the Supreme Court to continue bringing the Fourth Amendment law into the modern era. The companies stated that customers should not be "forced to relinquish Fourth Amendment protections" against intrusion by the government, simply because they choose to use modern technology.

Note: Due to the political nature of the discussion regarding this topic, the discussion thread is located in our Politics, Religion, Social Issues forum. All forum members and site visitors are welcome to read and follow the thread, but posting is limited to forum members with at least 100 posts.

Popular Stories

homeview calendar

Apple's HomeView Touts These 5 Privacy Features

Tuesday October 13, 2026 7:31 am PDT by
Apple uses a number of methods to keep HomeView users' personal information private, even when a whole household shares the device. The device recognizes up to six people, giving each their own Home Screen with personalized apps and widgets. Apple says personal content stays private to each user, while shared photo albums and music can remain available to everyone in the household, including ...
iPhone Duo Display Cracking

Apple Alerts Stores to iPhone Duo's Display Cracking Issue

Friday October 30, 2026 3:20 pm PDT by
In a memo shared with Apple Stores and Apple Authorized Service Providers this week, and later obtained by MacRumors, Apple provided technicians with guidance on how to diagnose and address the iPhone Duo's inner display cracking issue. If a customer reports the issue, Apple advised technicians to inspect the iPhone Duo and repair or replace it in accordance with their standard procedures....
apple pro tell logo

Apple Launching Five New Products This Friday

Monday November 2, 2026 1:22 am PST by
Apple is releasing five new products this Friday, November 6, following pre-orders that opened last week, including its first touchscreen MacBook Pro models. The following new products will be available from Friday: iPad mini with OLED display and A20 Pro chip iMac with M6 chip 14-inch MacBook Pro with M6 chip 14-inch MacBook Pro with OLED touchscreen 16-inch MacBook Pro with OLED...

Top Rated Comments

109 months ago
I'm shocked this isn't a 9-0 slam dunk with a poster for it... how can we be so vocal about the 2nd Amendment, or the 1st... and not be equally as loud for the 4th? "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated"........... come on now.
Score: 34 Votes (Like | Disagree)
slimtastic Avatar
109 months ago
From the start, this should have ALWAYS required a warrant.
Score: 20 Votes (Like | Disagree)
109 months ago
Another 'liberal' case where Roberts sided for.

The Court could soon take a liberal turn if Roberts continues on his current trajectory, unless a liberal justice retires during Trump's presidency.
How is this a liberal decision? Generally curious.
Score: 17 Votes (Like | Disagree)
109 months ago
I wonder how long before Apple offers the ability to delete your location data, using a method similar to how you can clear your browser history.
Score: 14 Votes (Like | Disagree)
ssgbryan Avatar
109 months ago
Because conservatives really don’t democracy.
Score: 11 Votes (Like | Disagree)
izyreal Avatar
109 months ago
Another 'liberal' case where Roberts sided for.

The Court could soon take a liberal turn if Roberts continues on his current trajectory, unless a liberal justice retires during Trump's presidency.
I disagree with your proposition that this was a liberal decision. As a fairly conservative guy, I believe that the decision represented a clear victory for the 4th amendment. I do not think that the supreme court can or should make decisions that conflict with the constitution. If you don't like what the constitution says, there is a process to amend it.

IMHO, the 4th amendment is black and white clear in this case:
"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."

My phone is one of my "effects" that is constitutionally protected. The data within my phone (or that is generated by use of my phone) is also protected as it is an integral part of my effect (my phone).
Score: 8 Votes (Like | Disagree)
Latest Stories
Early Black Friday Brings Steep Price Drops on Apple's Latest iPhone Cases
Early Black Friday Brings Steep Price Drops on Apple's Latest iPhone Cases
48 minutes ago
John Ternus Hosting His First Earnings Call as Apple CEO Today
John Ternus Hosting His First Earnings Call as Apple CEO Today
2 hours ago
Here's What Spotify Looks Like on Apple's HomeView
Here's What Spotify Looks Like on Apple's HomeView
3 hours ago
iOS 27.2.1 Coming Soon, iOS 27.3 Beta Likely Available Tomorrow
iOS 27.2.1 Coming Soon, iOS 27.3 Beta Likely Available Tomorrow
3 hours ago
Mark Gurman: Apple Initially Aimed to Release iPhone Duo in November
Mark Gurman: Apple Initially Aimed to Release iPhone Duo in November
4 hours ago
Best Early Black Friday Deals on Apple Products Available Now
Best Early Black Friday Deals on Apple Products Available Now
4 hours ago
Apple Isn't Done With 2026: Here's What's Still Coming
Apple Isn't Done With 2026: Here's What's Still Coming
4 hours ago
Apple 'HomeView Ultra' With 9-Inch 360º Screen Detailed in New Report
Apple 'HomeView Ultra' With 9-Inch 360º Screen Detailed in New Report
4 hours ago
Apple TV 4K Pre-Order Discount Returns at Amazon
Apple TV 4K Pre-Order Discount Returns at Amazon
5 hours ago
Zoom and These Microsoft Apps Now Optimized for iPhone Duo
Zoom and These Microsoft Apps Now Optimized for iPhone Duo
5 hours ago
Canva Brings Free All-in-One Affinity App to iPad
Canva Brings Free All-in-One Affinity App to iPad
6 hours ago
iPhone Duo: Latest Buyer Wait Times
iPhone Duo: Latest Buyer Wait Times
7 hours ago
iPhone Duo Owners Can't Change Display Zoom After Setup
iPhone Duo Owners Can't Change Display Zoom After Setup
3 hours ago
Apple HomeView Could Double as a Security Camera
Apple HomeView Could Double as a Security Camera
10 hours ago
Apple Launching Five New Products This Friday
Apple Launching Five New Products This Friday
10 hours ago
Nearly Every M5 MacBook Air Now $200 Off on Amazon
Nearly Every M5 MacBook Air Now $200 Off on Amazon
1 day ago
Apple's HomeView Ships With Six-Month-Old Software
Apple's HomeView Ships With Six-Month-Old Software
1 day ago
Three New iPads Rumored to Launch in First Half of 2027
Three New iPads Rumored to Launch in First Half of 2027
1 day ago
Apple Offers Steps to Fix Daylight Saving Time Bug on Apple Watch
Apple Offers Steps to Fix Daylight Saving Time Bug on Apple Watch
1 day ago
Apple Watch Ultra 4 Hits All-Time Low Price With Amazon's $99 Discount
Apple Watch Ultra 4 Hits All-Time Low Price With Amazon's $99 Discount
2 days ago
Reminder: Apple's Big Discount on Beats 360 Ear Cushions Ends Today
Reminder: Apple's Big Discount on Beats 360 Ear Cushions Ends Today
2 days ago
Here's a New Tour of Apple's HomeView Software
Here's a New Tour of Apple's HomeView Software
2 days ago
Apple Reveals New iPad Mini's Battery Capacity
Apple Reveals New iPad Mini's Battery Capacity
2 days ago
Top Stories: Apple's Big MacBook Pro, iPad mini and iMac Updates
Top Stories: Apple's Big MacBook Pro, iPad mini and iMac Updates
2 days ago
'Pluribus' Season 2 Reportedly Starts Production Today
'Pluribus' Season 2 Reportedly Starts Production Today
3 days ago
iPhone 18 Pro Sales Surge in China, Offsetting Decline in U.S. and Japan
iPhone 18 Pro Sales Surge in China, Offsetting Decline in U.S. and Japan
3 days ago
HomeView Software 27.2: Wallpapers, Control Center, and More
HomeView Software 27.2: Wallpapers, Control Center, and More
3 days ago
Apple Alerts Stores to iPhone Duo's Display Cracking Issue
Apple Alerts Stores to iPhone Duo's Display Cracking Issue
3 days ago
iOS 27.3 Will Enable These Apple Intelligence Features in China
iOS 27.3 Will Enable These Apple Intelligence Features in China
3 days ago
Apple Says iOS 27.3 Beta Coming Next Week
Apple Says iOS 27.3 Beta Coming Next Week
3 days ago