Returning from a holiday break, Apple today seeded iOS 5.1 Beta 3 to developers to allow for further testing of the next update to the company's mobile operating system. The new version arrives as Build 9B5141a, up from the previous Build 9B5127a released ad iOS 5.1 Beta 2 on December 12.
Screenshot of iOS 5.1 Beta 3 over-the-air update (Source: @CDeeRON)
So far the update appears to only be available via the over-the-air update mechanism for existing iOS 5.1 beta users, but should become available for general download through Apple's iOS developer program site shortly. We'll have more information on the new build at that time.
Update: We're still waiting for Apple to post iOS 5.1 beta 3 to the developer site with release notes, but commenters in our forums have noted that the new build restores the toggle that allows users to turn off 3G cellular data access. As Apple notes on the setting, 3G offers faster data speeds but uses more battery power than EDGE.
Update 2: iOS 5.1 Beta 3 is now available via the iOS developer program portal. Xcode 4.3 Developer Preview 3 and Apple TV Software Beta 2 have also been released today.
The full release notes for iOS 5.1 Beta 3 still have not been posted.
Update 3: The release notes for iOS 5.1 Beta 3 have now been posted, and one item of note involves a new API to help developers flag app content that should not be backed up.
iOS 5.1 introduces a new API to mark files or directories that should not be backed up. For NSURL objects, add the NSURLIsExcludedFromBackupKey attribute to prevent the corresponding file from being backed up.
The addition appears to be an expansion of the company's iOS 5.0.1 effort to help deal with content being stored for offline use that does not need to be committed to a device backup but which should not be subject to removal during the purging of caches. Apple will be replacing the com.apple.MobileBackup file attribute introduced in iOS 5.0.1 with the new API usage in iOS 5.1.
Wednesday October 1, 2025 1:26 pm PDT by Joe Rossignol
iOS 26 was released last month, but the software train never stops, and iOS 26.1 beta testing is already underway. So far, iOS 26.1 makes both Apple Intelligence and Live Translation on compatible AirPods available in additional languages, and it includes some other minor changes across Apple Music, Calendar, Photos, and Safari.
More features and changes will follow in future versions,...
Thursday October 2, 2025 7:26 am PDT by Joe Rossignol
Nearly two weeks after the iPhone 17 series launched, analysts at investment banking firm Morgan Stanley said demand for the devices has been "modestly stronger than we originally expected," based on a combination of extended shipping estimates on Apple's online store and information it gathered from Apple's supply chain.
There has been strong early demand for the iPhone 17, iPhone 17 Pro,...
Friday October 3, 2025 3:39 am PDT by Tim Hardwick
The MacBook Air is Apple's most popular laptop – a thin, fanless machine that wields quiet power thanks to the efficiency of Apple silicon. While the M4 model isn't exactly old, attention is already turning to its successor.
Apple doesn't telegraph new product launches ahead of time, but we can draw a surprisingly clear picture of what to expect by looking at Apple's silicon roadmap,...
Monday September 29, 2025 9:31 am PDT by Joe Rossignol
Apple's annual iPhone event is in the rearview mirror, but rumors suggest the company plans to release a handful of additional products before the year ends.
Will there be another Apple event this October? We discuss the possibility below.
Apple in October
Apple's most recent October events were in 2021 and 2023.
In 2022 and 2024, Apple did not host an October event. Instead, it...
On this episode of The MacRumors Show, we discuss the latest leaks about the next-generation iPad Pro, MacBook Pro, Studio Display, and Vision Pro.
Subscribe to The MacRumors Show YouTube channel for more videos
Earlier this week, an apparent unboxing video of an updated iPad Pro with the M5 chip was shared online. The same YouTube account leaked the 14-inch MacBook Pro with the M4 chip...
Wednesday October 1, 2025 8:27 am PDT by Joe Rossignol
A handful of upcoming Apple products leaked yesterday, through a combination of YouTube videos out of Russia and U.S. Federal Communications Commission (FCC) documents that were released, despite Apple's confidentiality requests.
The leaked products include an iPad Pro with an M5 chip, as well as updated MacBook Pro and Apple Vision Pro models. All of these devices had already been rumored...
Wednesday October 1, 2025 3:56 pm PDT by Juli Clover
Apple's two big yearly events, WWDC and the iPhone launch, are done and over with, but there are still some new products that we're expecting to see before the end of the year.
Apple TV
The Apple TV hasn't been updated since 2022, so it's due for a refresh. It doesn't look like Apple is going to change the design of its set-top box, but we can expect a faster chip
Apple code suggests...
Saturday October 4, 2025 8:19 am PDT by Joe Rossignol
Apple's website offers a list of nearly 200 new features and changes (PDF file) included in the software update, released last month.
Apple also shared equivalent lists for iPadOS 26 and macOS Tahoe.
iOS 26 is compatible with the iPhone 11 and newer. To install the update, open the Settings app on your iPhone, tap on General, and tap on Software Update.
Below, we have highlighted eight ...
Absolutely NOT. Edge is painfully slow. And other than battery life, it isn't like your data usage will be less on Edge. It'll just download slower.
But it can effect battery drastically. If you are in an area with poor 3G, your phone is constantly looking for that signal. If you manually switch to Edge it saves battery because its not looking for 3G.
Absolutely NOT. Edge is painfully slow. And other than battery life, it isn't like your data usage will be less on Edge. It'll just download slower.
Obviously....but that's not why people turn off 3G. Sometimes 3G can be bogged down or unresponsive. For example when I attend NFL games, it's sometimes impossible to send texts or get data on 3G, but when I switch to EDGE, things go through. Ever since I got my 4S though, this hasn't been possible.
Anyone else crossing their fingers this enables 4s users to be able to switch 3G off and use EDGE only. I'm not talking about turning cellular data off.
Anyone else crossing their fingers this enables 4s users to be able to switch 3G off and use EDGE only. I'm not talking about turning cellular data off.
