Technologies

iOS 16.4 Is Out. How to Download the Latest iPhone Update

Added features include new emoji, voice isolation for better cellular calls, Safari website notifications for the lock screen 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 just released iOS 16.4. The latest software update for the iPhone brings several new features to iOS 16, including 21 new emoji, including the pea pod, light blue heart and jellyfish, and voice isolation 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

iOS 17 Cheat Sheet: Your Questions on the iPhone Update Answered

Here’s what you need to know about new features and upcoming updates for your iPhone.

Apple’s iOS 17 was released in September, shortly after the company held its Wonderlust event, where the tech giant announced the new iPhone 15 lineup, the Apple Watch Series 9 and the Apple Watch Ultra 2. We put together this cheat sheet to help you learn about and use the new features in iOS 17. It’ll also help you keep track of the subsequent iOS 17 updates.

iOS 17 updates

Using iOS 17

Getting started with iOS 17

Make sure to check back periodically for more iOS 17 tips and how to use new features as Apple releases more updates.

17 Hidden iOS 17 Features You Should Definitely Know About

+15 More

See all photos

Technologies

Get Ready for a Striking Aurora That Could Also Disrupt Radio Communications

Don’t expect the storm to cause a lingering problem, though.

A geomagnetic storm is threatening radio communications Monday night, but that doesn’t mean you should be concerned. In fact, it may be an opportunity to see a colorful aurora in the night sky.

The National Oceanic and Atmospheric Administration has issued a geomagnetic storm watch after witnessing a coronal mass ejection from the sun on Saturday. The watch, which was issued over the weekend and will expire after Monday, said the onset of the storm passing over Earth on Sunday night represented a «moderate» threat to communications. As the storm continues to pass through, it could deliver a «strong» threat on Monday night that could cause radio communications to be temporarily disrupted during the worst of it.

Even so, NOAA said, «the general public should not be concerned.»

A coronal mass ejection occurs when magnetic field and plasma mass are violently expelled from the sun’s corona, or the outermost portion of the sun’s atmosphere. In the vast majority of cases, the ejection occurs with no real threat to Earth. However, in the event the ejection happens in the planet’s direction, a geomagnetic storm occurs, and the Earth’s magnetic field is temporarily affected.

In most cases, geomagnetic storms cause little to no disruption on Earth, with radio communications and satellites affected most often. In extreme cases, a geomagnetic storm can cause significant and potentially life-threatening power outages — a prospect that, luckily, the planet hasn’t faced.

Switching poles

Every 11 years, the sun’s magnetic poles switch, with the north pole and south pole swapping positions. During those cycles, the sun’s activity ramps up as it gets closer to pole-switching time. The height of its activity is called solar maximum, and scientists believe we either may be entering the solar maximum or may be already in it.

During periods of heightened solar activity, sunspots increase on the sun and there’s an increase in coronal mass ejections, among other phenomena. According to NOAA, solar maximum could extend into October of this year before the sun’s activity calms and it works towards its less-active phase, solar minimum.

Even when geomagnetic storms hit Earth and disrupt communications, the effects are usually short-lived. Those most affected, including power grid operators and pilots and air traffic controllers communicating over long distances, have fail-safe technologies and backup communications to ensure operational continuity.

But geomagnetic storms aren’t only about radios. In most cases, they also present unique opportunities to see auroras in the night sky. When the storms hit, the plasma they carry creates a jaw-dropping aurora, illuminating the night sky with brilliant colors. Those auroras can be especially pronounced during the most intense phases of the storm, making for nice stargazing.

If you’re interested in seeing the aurora, you’ll need to be ready. The NOAA said the «brunt of the storm has passed» and even if it lingers into Tuesday, there won’t be much to see after Monday night.

Technologies

Last Total Solar Eclipse for 20 Years Is Coming: How to See and Photograph It

It’s your last chance until 2044.

Get your eclipse glasses ready, Skygazers: the Great American Eclipse is on its way. On April 8, there’ll be a total eclipse over North America, the last one until 2044.

A total solar eclipse happens when the moon passes between the Earth and the sun, blocking the sun and turning an otherwise sunny day to darkness for a short period of time. Depending on the angle at which you’re viewing the eclipse, you may see the sun completely shrouded by the moon (called totality) or some variation of it. The more off-angle you are and the further you are from the path of the eclipse, the less likely you’ll be to see the totality.

The 2024 total solar eclipse will happen on Monday, April 8. The Great American Eclipse will reach the Mexican Pacific coast at 11:07 a.m. PT (2:07 p.m. ET), and then traverse the US in a northeasterly direction from Texas to Maine, and on into easternmost Canada. If you want a good look at it, but don’t live in the path of totality, you shouldn’t wait much longer to book accommodation and travel to a spot on the path.

Or how about booking a seat in the sky? Delta Airlines made headlines for offering a flight that allows you to see the entire path of totality. Its first eclipse flight, from Austin, Texas, to Detroit sold out quickly. But as of Monday, Delta has added a second flight from Dallas to Detroit, which also covers the path of totality. The airline also has five flights that will offer prime eclipse viewing.

Not everyone can get on one of those elusive eclipse-viewing flights. Here’s a look at other options to nab a chance to see this rare sight and what to know about it.

Total solar eclipse path

The eclipse will cross over the Pacific coast of Mexico and head northeast over mainland Mexico. The eclipse will then make its way over San Antonio at approximately 2:30 p.m. ET on April 8 and move through Texas, over the southeastern part of Oklahoma and northern Arkansas by 2:50 p.m. ET.

By 3 p.m. ET, the eclipse will be over southern Illinois, and just 5 minutes later, will be traveling over Indianapolis. Folks in northwestern Ohio will be treated to the eclipse by 3:15 p.m. ET, and it will then travel over Lake Erie and Buffalo, New York, by 3:20 p.m. ET. Over the next 10 minutes, the eclipse will be seen over northern New York state, then over Vermont. By 3:35 p.m. ET, the eclipse will work its way into Canada and off the Eastern coast of North America.

Best places to watch the Great American Eclipse

When evaluating the best places to watch this year’s total eclipse, you’ll first want to determine where you’ll have the best angle to see the totality. The farther off-angle you are — in other words, the farther north or south of the eclipse’s path — the less of an impact you can expect.

Therefore, if you want to have the best chance of experiencing the eclipse, you’ll want to be in its path. As of this writing, most of the cities in the eclipse’s path have some hotel availability, but recent reports have suggested that rooms are booking up. And as more rooms are booked, prices are going up.

So if you want to be in the eclipse’s path, and need a hotel to do it, move fast. And Delta’s eclipse-viewing flight from Dallas to Detroit has just four seats left at the time of publication.

Eclipse eye safety and photography

As with any solar eclipse, it’s critical you keep eye safety in mind.

During the eclipse, and especially during the periods before and after totality, don’t look directly at the sun without special eye protection. Also, be sure not to look at the sun through a camera (including the camera on your phone), binoculars, a telescope or any other viewing device. This could cause serious eye injury. Sunglasses aren’t enough to protect your eyes from damage.

If you want to view the eclipse, you’ll instead need solar viewing glasses that comply with the ISO 12312-2 safety standard. Anything that doesn’t meet that standard or greater won’t be dark enough to protect your eyes. Want to get them for free? If you’ve got a Warby Parker eyeglasses store nearby, the company is giving away free, ISO-certified solar eclipse glasses at all of its stores from April 1 until the eclipse, while supplies last.

If you don’t have eclipse viewing glasses handy, you can instead use indirect methods for viewing the eclipse, like a pinhole projector.

Read more: A Photographer’s Adventure With the Eclipse

In the event you want to take pictures of the eclipse, attach a certified solar filter to your camera. Doing so will protect your eyes and allow you to take photos while you view the eclipse through your lens.

There’s also a new app to help you both protect your eyes and take better photos of the eclipse on your phone. Solar Snap, designed by a former Hubble Space Telescope astronomer, comes with a Solar Snap camera filter that attaches to the back of an iPhone or Android phone, along with solar eclipse glasses for protecting your eyesight during the event. After you attach the filter to your phone, you can use the free Solar Snap Eclipse app to zoom in on the eclipse, adjust exposure and other camera settings, and ultimately take better shots of the eclipse.

2024 eclipse compared to 2017

The last total solar eclipse occurred in 2017, and many Americans had a great view. Although there are plenty of similarities between the 2017 total solar eclipse and the one coming April 8, there are a handful of differences. Mainly, the 2024 eclipse is going to cover more land and last longer.

The 2017 eclipse started over the northwest US and moved southeast. Additionally, that eclipse’s path was up to 71 miles wide, compared with a maximum width of 122 miles for this year’s eclipse. Perhaps most importantly, the moon completely covered the sun for just 2 minutes, 40 seconds in 2017. This year, maximum totality will last for nearly four-and-a-half minutes.