Apple Seeds Fourth Beta of iOS 10.2.1 to Developers and Public Beta Testers

Apple today seeded the fourth beta of an upcoming iOS 10.2.1 update to developers and public beta testers, a few days after seeding the third iOS 10.2.1 beta and a month after releasing iOS 10.2, the second major update to the iOS 10 operating system.

Registered developers can download the fourth iOS 10.2.1 beta from the Apple Developer Center or over-the-air with the proper configuration profile installed.

ios-10-2-1-beta
It isn't yet known what features are included in iOS 10.2.1, but as a minor 10.2.x update, it appears to focus on bug fixes and performance improvements rather than major outward-facing changes. No new features were discovered in the first three iOS 10.2.1 betas, but we'll update this post if any changes are found in the fourth beta.

iOS 10.2.1 follows the release of iOS 10.2, a significant update that brought Unicode 9 emoji, a new TV app, Messages Screen Effects, Music improvements, and a whole slew of bug fixes.

Related Forum: iOS 10

Popular Stories

iPhone 17 Pro 3 4ths Perspective Aluminum Camera Module 1

New iPhone 17 Pro Details: Brighter Display, Best Battery Life, and More

Wednesday September 3, 2025 5:33 am PDT by
Apple's iPhone 17 Pro and iPhone 17 Pro Max models will feature a number of significant display, thermal, and battery improvements, according to new late-stage rumors. According to the Weibo leaker known as "Instant Digital," the iPhone 17 Pro models will feature displays with higher brightness, making it more suitable for use in direct sunlight for prolonged periods. The iPhone 16 Pro and...
iPhone 17 Pro Iridescent Feature 2

iPhone 17 and iPhone 17 Pro Prices Estimated Ahead of Apple Event Next Week

Tuesday September 2, 2025 1:50 pm PDT by
Just one week before Apple is expected to unveil the iPhone 17 series, an analyst has shared new price estimates for the devices. Here are J.P. Morgan analyst Samik Chatterjee's price estimates for the iPhone 17 series in the United States, according to 9to5Mac: Model Starting Price Model Starting Price Change iPhone 16 $799 iPhone 17 ...
Apple Watch Ultra 2 Complications

Apple Watch Ultra 3 Coming Next Week: Eight Reasons to Upgrade

Thursday September 4, 2025 7:38 am PDT by
We're only days away from Apple's "Awe dropping" fall event scheduled to take place on Tuesday, September 9 – and along with the new iPhone 17 series, we're going to get a new version of the Apple Watch Ultra for the first time since 2023. By the time the Ultra 3 is unveiled, it will have been two years since the previous model arrived. The intervening period has left plenty of room for...
iPhone 17 Pro Iridescent Feature 2

iPhone 17 Pro Clear Case Leak Reveals Three Key Changes

Sunday August 31, 2025 1:26 pm PDT by
Apple is expected to unveil the iPhone 17 series on Tuesday, September 9, and last-minute rumors about the devices continue to surface. The latest info comes from a leaker known as Majin Bu, who has shared alleged images of Apple's Clear Case for the iPhone 17 Pro and Pro Max, or at least replicas. Image Credit: @MajinBuOfficial The images show three alleged changes compared to Apple's iP...
iPhone 17 Pro Dark Blue and Orange

iPhone 17 Release Date, Pre-Orders, and What to Expect

Thursday August 28, 2025 4:08 am PDT by
An iPhone 17 announcement is a dead cert for September 2025 – Apple has already sent out invites for an "Awe dropping" event on Tuesday, September 9 at the Apple Park campus in Cupertino, California. The timing follows Apple's trend of introducing new iPhone models annually in the fall. At the event, Apple is expected to unveil its new-generation iPhone 17, an all-new ultra-thin iPhone 17...
iPhone 17 AIR Loud Feature

iPhone 17 Air Could Start at $1,099 With 256GB Storage, 1TB for $1,499

Thursday September 4, 2025 2:54 am PDT by
Apple's upcoming iPhone 17 Air will have a $1,099 starting price providing 256GB of base storage and will max out at $1,499 with a 1TB option, according to the latest TrendForce report. Apple will offer three price/storage tiers for the all-new ultra-thin iPhone 17 model, which replaces last year's iPhone 16 Plus in the lineup. Here's how TrendForce sees them breaking down: 256GB — $1099...

Top Rated Comments

gsmornot Avatar
113 months ago
Half expected the headline to read 10.3 but thats ok.
Score: 6 Votes (Like | Disagree)
C DM Avatar
113 months ago
What happened to the 10.3 beta that was supposed to come out on the 10th?
Hasn't been released so far.
Score: 2 Votes (Like | Disagree)
bigpoppa Avatar
113 months ago
14D27
Score: 2 Votes (Like | Disagree)
AaronM5670 Avatar
113 months ago
Not so sure what you mean. There has been a new "main page" where all email accts/tabs are in mail app since I believe 10.2. If thats what you are referring to its not new to this beta.
Yep, that's what I meant.

I just hadn't noticed it before, so maybe something changed subtly in this update that brought my attention to it.
Score: 2 Votes (Like | Disagree)
AhRiHmAn Avatar
113 months ago
Is it worth running the public beta or being part of the public beta program on your daily driver?
I always install those beta from beta 4 or 5 , this way you're almost sure you have something close to final...
Score: 1 Votes (Like | Disagree)
otternonsense Avatar
113 months ago
Still waiting for that glorious day that the Control Center will be reunited as in iOS 9 :(
Score: 1 Votes (Like | Disagree)