Technologies
Download iOS 16.4 on Your iPhone: What to Know Before Updating
Features include 21 new emoji, voice isolation for better phone call quality and more.

This story is part of Focal Point iPhone 2023, CNET’s collection of news, tips and advice around Apple’s most popular product.
Apple has released iOS 16.4 for the iPhone. The latest iOS software update adds several new features, like 21 new emoji (including shaking face, light blue heart and donkey) and a voice isolation feature for cellular phone calls, which blocks out ambient noises to make your voice clearer.


iOS 16.4 also adds Safari-based push notifications, duplicates album support for the iCloud Shared Photo Library, crash-detection optimizations for the iPhone 14 series, VoiceOver support for maps in the Weather app, bug fixes, security updates and more.
Read on for a step-by-step guide to the process of putting iOS 16.4 on your compatible iPhone. You can also check out some of the best existing features on iOS 16 and a few hidden features we were surprised to find. And if you recently got a new iPhone, here are the best iPhone 14 cases so far.
Before you start, is your iPhone even compatible?
Not every iPhone will receive the iOS 16.4 update. You need at least an iPhone 8, which was released back in 2017, to run iOS 16. That also includes the iPhone X, iPhone 11, iPhone SE (second generation and up) and the new iPhone 14.


The iPhone 14 comes preinstalled with iOS 16.
James Martin/CNET
Next, back up your iPhone
Getting your hands on new software can be exciting, but there are precautions you should take before updating. You may not be happy with some of the features that iOS 16.4 has to offer (although you can fix some of the most annoying ones), so you need to be able to downgrade back to an earlier version of iOS 16 for whatever reason — and that requires you to back up your iPhone before you update.
By default, your iPhone should back itself up every time it’s connected to power and Wi-Fi during your regular sleep hours. However, if this backup feature is disabled, you can go to Settings > Your Name > iCloud > iCloud Backup and then hit Back Up Now to back up your device.


You can (and should) also back up your iPhone on your Mac.
Screenshot by Nelson Aguilar/CNET
Additionally, you can back up your iPhone via Finder on your Mac. Simply connect your device to your computer, open Finder, choose your device and then create a backup. Apple also recommends archiving your backup, so that it’s not overwritten by other backups.
Also, make sure to do these three things
You want the download and installation process to go as smoothly as possible, and the best way to do that is to do the following:
- Make sure your iPhone is connected to power. You won’t be able to download iOS 16.4 if you’re under 50% battery, so it’s best to just plug in your phone while you update. And even when you’re plugged in, the battery needs to be over 20%.
- Connect to Wi-Fi. You also won’t be able to download iOS 16.4 with cellular data, so connect to a stable Wi-Fi network.
- Clear up enough storage space. If you’re running out of storage, you’ll need to clear some up before you can download and install iOS 16.4. Go to Settings > General > iPhone Storage to delete large files and apps.
Here’s our guide on how to get more iPhone storage.
How to download and install iOS 16.4
Now once you have all that set, open your iPhone and go to Settings > General > Software Update, wait a few seconds (or minutes) for the update to appear and then hit Download and Install for iOS 16.4.


You can also use Finder on your Mac to download iOS 16.4 on your iPhone.
Nelson Aguilar/CNET
You should then see a loading bar, along with a rough estimate of how long the download process will take. Once the download is complete, reboot your device and wait for iOS 16.4 to install. When your iPhone boots up, follow any prompts and you should then see iOS 16.4 downloaded on your device.
For more on the new OS, here’s a look at our iOS 16 cheat sheet and some of the most annoying features and settings on iOS 16 (and how you can fix them).
Technologies
Anker Products on Amazon Are Reportedly 18% More Expensive as Tariffs Ramp Up
A product research company tracked 127 Anker products and found a jump in pricing on the retail giant’s site.

Shoppers on Amazon looking for products from the portable gadgets maker Anker are already seeing the effects of US tariffs against China, with an 18% average increase across 127 products since April 3, according to the Reuters news agency.
Reuters was citing information from the product research company SmartScout, which tracked pricing on the retailer for the products, which are manufactured in China. The 127 products account for about one-fifth of Anker’s products on Amazon, Reuters said.
Anker did not immediately respond to a request for comment.
Consumers are being advised to shop carefully for products that are manufactured in or include components from countries affected by tariffs imposed by the Trump administration, ranging from smartphones to vehicles to cameras and TVs. The US is currently holding China, where many electronics are made, to a 145% tariff rate. China has retaliated with 125% tariffs on US goods sold in China.
Is now the time to buy?
Consumers who are planning to make purchases this year need to avoid panic buying and plan ahead to time their purchases, said Stephanie Carls, a retail analyst with the discount-finding service RetailMeNot and video host for Ziff Davis Shopping.
A barrage of news about tariffs is causing lots of uncertainty for buyers.
«This week in general, it’s been kind of wild,» she said. «Are we doing (tariffs) or are we not doing them?»
Carls said, «I think it’s really making people sit and almost like wonder ‘what do I need to prepare myself for?’ As the tariffs are rolling out, these prices are then rising behind the scenes and shoppers are having to then be much smarter and I think savvier.»
Outside of Black Friday, the best time for heavy discounts on items such as electronics tends to be during back-to-school season and, for products like Anker’s, during Amazon’s Prime Day events. The next one is expected to be in July, and Carls said it will be interesting to see if discounts will be as high as they’ve been during previous shopping events.
She suggests checking out sites such as CamelCamelCamel to track historical pricing for items on Amazon. Stacking savings with credit cards or sites that offer cashback on top of sales prices and promo codes, if they’re available, can help offset price increases, she said.
«Smart shoppers are watching these trends and then they’re shopping accordingly,» Carls said. «So we’re in a window where planning ahead can really help your wallet. And I think that that’s just going to be a situation where you have start paying attention to that timing mixed with those different sale events that are happening.»
Technologies
Load Faster and Crash Less with Marvel Rival’s New Experimental Feature
The new performance setting lets you spend less time compiling shaders and more time bringing the beatdown on some baddies in Marvel’s hero shooter.

The Hellfire Gala isn’t the only reason for Marvel Rivals PC players to party in Season 2. The hit hero shooter just got a new experimental performance setting that aims to speed up load times and prevent crashes.
PC players have been plagued with issues since the release of Marvel Rivals. Even with adequate memory and beefy GPUs, the game’s performance has been shaky for many players. The new mode aims to solve these issues, especially for any players who have 16GB of RAM or less installed in their rig.
Toggling Switch Shader Compilation Mode will ensure that the game only goes through the shader compilation on the first startup after a new patch or graphics driver update, rather than every time you launch the game.
The developers also have optimized the game’s memory usage, cutting down on severe frames per second drops, visual stutters and crashes caused by memory shortages.
Here’s how you can turn on the new Switch Shader Compilation Mode and optimize your Marvel Rivals performance.
How do I turn on Switch Shader Compilation Mode for Marvel Rivals?
You don’t actually turn on the new performance setting from the in-game settings menu. Because Switch Shader Compilation Mode affects load times, you need to toggle this option within the Marvel Rivals launcher before you start the game.
The Switch Shader Compilation Mode setting appears in a long rectangular box directly to the left of the «Launch» button. To turn on the mode, simply check the box on the left side of the rectangle and run the game.
Known bugs that can occur with the Switch Shader Compilation Mode
This new performance feature was released in an experimental state, which means you might run into some bugs. None of these are game-breaking, nor are they permanent, so you don’t have to worry about running Marvel Rivals with this option toggled.
When Switch Shader Compilation Mode is turned on, some textures may render abnormally at the beginning of a match but will return to their normal state after several frames.
As these textures properly load, you may also experience momentary stutters before the game once again settles into a continuous picture. Both of these bugs are supposed to last for only a few frames at the start of each match, well before players step outside of the spawn doors.
A heads-up for those using older silicon: On systems with lower end CPUs (those with six or fewer threads), enabling Switch Shader Compilation Mode alongside AMD FSR3 Frame Generation could potentially create stutters that will last throughout a match.
This doesn’t mean players with less powerful CPUs can’t use Switch Shader Compilation Mode but it does mean that they should disable AMD FSR3 Frame Generation while they do so. It’s unclear whether there will be a fix for this bug — but development will continue on this experimental performance feature nonetheless.
Technologies
Katy Perry Blasts to Space With Blue Origin Monday: How to Watch
Music icon Katy Perry and an all-female crew are set to launch on a Blue Origin New Shepard spacecraft on April 14.

Pop star Katy Perry may need to update the lyrics to her hit song Firework to «Baby, you’re an astronaut.» On Monday, Perry is set to become one of the latest celebrities to visit space. Author and former journalist Lauren Sanchez is also part of Blue Origin’s NS-31 mission. Sanchez is the fiancé of Jeff Bezos, founder of Amazon and Blue Origin.
NASA rocket scientist Aisha Bowe, bioastronautics research scientist Amanda Nguyễn, film producer Kerianne Flynn and CBS host Gayle King (Oprah Winfrey’s bestie) fill out the roster for the all-female crew.
This will be the first all-female spaceflight since Soviet cosmonaut Valentina Tereshkova’s historic solo spaceflight in 1963. Tereshkova was the first woman in space.
How to watch Katy Perry go to space
The New Shepard spacecraft will launch from West Texas. The launch window opens at 8:30 am CT on Monday, April 14. Blue Origin’s live coverage kicks off at 7 am on Youtube and on X.
Does New Shepard reach space?
There’s an ongoing debate about what represents space. For example, everyone agrees the International Space Station is in space but commercial rocket rides like what Blue Origin operates fall into a gray zone. One benchmark is the Karman line, an imagined line 62 miles above the Earth’s surface.
NASA recognizes «there’s really no clear boundary between where Earth’s atmosphere ends and outer space begins,» but says most scientists recognize the Karman line as the transition point to space. So unless you want to get into a nitpicky argument, Perry and the rest of the crew will be making a brief visit to space.
The crew will experience weightlessness after the spacecraft passes the Karman line. The return trip involves a parachute-assisted landing.
This will be the 11th human flight for the New Shepard program. Blue Origin has already flown 52 people into space, including Star Trek’s William Shatner, Good Morning America host Michael Strahan and Bezos.
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