Apple Seeds iOS 5.1 Beta 3 to Developers, Restores 'Enable 3G' Toggle

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.

ios 5 1 beta 3 ota
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.

ios 5 1 beta 3 enable 3g
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.

ios 5 1 beta 3
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.

Popular Stories

iPhone 17 Pro 34ths Perspective

iPhone 17 Pro Launching Later This Year With These 10 New Features

Sunday March 23, 2025 10:00 am PDT by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of March 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...
iCloud General Feature Redux

iPhone Users Who Pay for iCloud Storage Receive a New Perk

Thursday March 20, 2025 12:01 am PDT by
If you pay for iCloud storage on your iPhone, Apple has a new perk for you, at no additional cost. The new perk is the ability to create invitations in the Apple Invites app for the iPhone, which launched in the App Store last month. In the Apple Invites app, iCloud+ subscribers can create invitations for any occasion, such as birthday parties, graduations, baby showers, and more. Anyone ...
Generic iOS 18

iOS 18.4 Coming Soon With These New Features for Your iPhone

Tuesday March 25, 2025 6:45 am PDT by
Apple is expected to release iOS 18.4 to the general public as soon as next week, following more than a month of beta testing. Apple's website says some iOS 18.4 features will be released in "early April," so the update should be out as early as Tuesday, April 1. Apple this week seeded the iOS 18.4 Release Candidate, which is typically the final beta version, barring the discovery of any...
Generic iOS 18

Apple Seeds iOS 18.4 and iPadOS 18.4 Release Candidate With Priority Notifications, Ambient Music and More

Monday March 24, 2025 10:07 am PDT by
Apple today seeded the release candidate versions of upcoming iOS 18.4 and iPadOS 18.4 updates to developers for testing purposes, with the software coming a week after Apple released the fourth betas. iOS 18.4 and iPadOS 18.4 can be downloaded from the Settings app on a compatible device by going to General > Software Update. With iOS 18.4, Apple is adding the Priority Notifications...
airpods max 2024 colors

Don't Buy Into Apple's Hype About AirPods Max Gaining Lossless Audio

Monday March 24, 2025 4:24 pm PDT by
Apple today announced that AirPods Max with a USB-C port will be gaining support for lossless audio and ultra-low latency audio with a firmware update next month, alongside the release of iOS 18.4, iPadOS 18.4, and macOS 15.4. For context, audio files are typically compressed to keep file sizes smaller. There are lossy compression standards like MP3 and AAC (Advanced Audio Codec), which...
iOS 18

Top 5 New Features Coming in iOS 18.4

Friday March 21, 2025 3:26 pm PDT by
We're not getting new Siri Apple Intelligence features in iOS 18.4 as expected, but the upcoming update does have quite a few new additions that will be worth upgrading for. We've rounded up the five best features to look forward to, and if you're not running the beta, you can expect to get access to these in early April. Priority Notifications If you have an iPhone or iPad that supports...
Foldable iPhone 2023 Feature Iridescent Search

Foldable iPhone Expected to Launch Next Year, Costing Around $2,000

Monday March 24, 2025 3:43 am PDT by
Apple will launch its long-rumored foldable iPhone next year with a ~$2,000 premium price tag attached, expects well-connected Bloomberg reporter Mark Gurman. Gurman's comments on Apple's launch plans for its first foldable device appeared in the Q&A section of his latest Power On newsletter. Earlier this month, the reporter said Apple's foldable iPhone could be arriving "as early as 2026,"...
ios 19 messages app

Here's What Apple's iOS 19 Messages App Might Look Like

Tuesday March 25, 2025 11:52 am PDT by
Leaker Jon Prosser today shared a mockup of what he says the Messages app will look like in iOS 19, demoing an interface with rounded, translucent bubble-shaped navigation buttons at the top and softer, rounder corners for the keyboard and word suggestions. Jon Prosser's Messages app mockup The return button, a button for going back to the Messages list, and the FaceTime button have a deeper...

Top Rated Comments

Mlrollin91 Avatar
172 months ago
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.
Score: 28 Votes (Like | Disagree)
bmms8 Avatar
172 months ago
guys, we all stand corrected.. in the latest beta, you can turn off 3G! this is great for me!
Score: 17 Votes (Like | Disagree)
mms13 Avatar
172 months ago
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.
Score: 15 Votes (Like | Disagree)
MattMJB0188 Avatar
172 months ago
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.
Score: 15 Votes (Like | Disagree)
Peace Avatar
172 months ago


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.

Like this ?
Score: 11 Votes (Like | Disagree)
bmms8 Avatar
172 months ago
Really or fake/troll post?

is something wrong with you? why dont you read my previous posts, or at least download and install the beta 3 before you comment.
Score: 10 Votes (Like | Disagree)