CarPlay Is Breaking for Some People After iOS 18.4 Update


Summary

  • The big iOS 18.4 update appears to have introduced glitches to CarPlay.
  • Users are experiencing connectivity issues and missing notifications.
  • While there’s no current fix, some users re-paired vehicles to the app with good results.

Apple recently released its highly anticipated iOS 18.4 update for iPhone users, which includes new emojis, AI goodies, priority notifications, and several changes to CarPlay. Unfortunately, those changes seem to be doing more harm than good, and we’re seeing several complaints that CarPlay is nearly unusable for some.

The iOS 18.4 update was supposed to finally fix some major CarPlay problems, especially for EV owners. The main CarPlay change is three rows of icons on the home screen, along with the ability to set a default navigation app in the EU instead of only Apple Maps. It also added APIs to allow sports apps to show scores on a new Now Playing interface. While it’s great that this release made it so users can now have three rows of icons on the home screen, it also delivered a bunch of connectivity issues and glitches to vehicles.

Multiple CarPlay users on Reddit, X (formerly Twitter), and elsewhere have reported that the iOS 18.4 update made vehicle connectivity unstable. We’re hearing that the dashboard no longer displays “Now Playing” information, notifications are acting wonky, and more. Interestingly enough, iOS 18 notification issues aren’t new, with beta users mentioning complaints last month.

More importantly, it’s easier to safely keep your hands on the wheel when your phone stays connected, allowing CarPlay to display maps, incoming calls, and other information. Unfortunately, that’s not the case for many, and countless users have reported repeated connectivity issues. Phones keep connecting and disconnecting endlessly, and for wired users, some are plugging the phone in over and over again until it finally connects and works as expected.

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The complaints are coming in from everywhere, and they’re not limited to a specific brand of vehicle or stereo receiver. Users on Reddit reported CarPlay bugs in cars from Audi, Chevrolet, Mazda, Ford, Honda, VW, and others.

So, what can you do to fix any of these problems? Unfortunately, we don’t know of any fixes at this time. 9to5Mac recommends unpairing the entire system, deleting your car from the CarPlay app, and starting over. Users can fire up an iPhone and go to Settings > General > CarPlay > and swipe to delete a vehicle. Then, re-pair your car to the phone and app, and hopefully, it’ll work a little better. One user said he tried this process twice, and the second time seems to have fixed the problem. Just know that your mileage may vary.

It doesn’t look like users can fix this themselves, and it’ll likely require a software update from Apple. If there’s a silver lining, it’s that Apple is already busy preparing to release its iOS 18.5 update, which is already in the beta testing phase. Once released, it should address some of these complaints. However, considering the iOS 18.5 update won’t be released until next month, many iPhone owners trying to use CarPlay could be out of luck until it arrives.

Along with changes to CarPlay, the update to iOS 18.4 finally added RCS support to Google FI and other T-Mobile carriers, fixed a bunch of random bugs, added more features to the Photos app, user review summaries in the App Store, Ambient Music controls in Control Center, and more. Stay tuned, and we’ll report back once we know more or find a potential fix.

Source: AutoEvolution, 9to5Mac



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Recent Reviews


Summary

  • Sony & Hisense are pioneering RGB LED tech to rival OLED displays.
  • RGB LEDs improve color accuracy at wider angles and brightness without burn-in risk.
  • RGB LEDs reduce bloom and offer large panels at cheaper prices than OLEDs.

If you ask most AV enthusiasts what the best display technology is right now, they’d probably respond with some variant of OLED panel. However, one of the best TV makers in the world has decided that OLED is not the way forward, and instead brings us RGB LED technology.

In mid-March of 2025, Sony unveiled its RGB LED technology. It’s not the only company pushing this OLED alternative, with Hisense aiming to launch RGB mini- and micro-LED TVs in 2025. So why are these companies bucking the OLED trend?

Sony’s RGB Backlight Tech Explained

Just in case you need a refresher, the main difference between OLED and LCD panels is that OLEDs are emissive. In other words, each OLED pixel emits its own light. This means that it can switch itself off and offer perfect black levels, among a few other advantages. LCDs need a “backlight” and one of the primary ways LCDs have improved over the years has been about backlight innovations as much as improvements to the liquid crystals.

Early LCDs used a simple CCFL (Cold Cathode Fluorescent Lamp) backlight with an internal reflector to spread the light around. As you might imagine, this was awful, and I still remember the cold and hot spots on my first LCD monitor being so bad that I thought there was something wrong with it.

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Since then, LCDs have been upgraded with LED backlights, which were placed all around the edges of the screen, so that it was far more evenly lit. Then the backlights were also added directly behind the screen, which allowed for neat tricks like local dimming. Now miniLED screens put hundreds or thousands of LED lights behind the screen, allowing for very precise local dimming, which improved contrast and black levels immensely.

A diagram of a conventional LCD with a quantum dot layer.
SONY

However, so far all of these LED backlight solutions have used a white (or blue) LED source. RGB LEDs replace this white LED with an RGB LED that can be any color. This means that the LED behind a given set of pixels is being driven with the same color light as the pixel is meant to produce and removes the need for color filters.

A diagram of an RGB LED LCD.
SONY

If you take the LCD layer off completely, then an RGB miniLED backlight would look like a low-res version of the original image. With enough LEDs, the image is still recognizable!

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Get ready for thinner and brighter Mini LED TVs.

Better Color Accuracy at Wider Angles

The Sony display demoed by the company promises 99% of the DCI-P3 color spectrum, and 90% of the next-gen BT.2020 spectrum. Making these displays some of the most color-accurate screens money can buy. With fewer layers of stuff in the display stack, and much more pure color to boot, the image looks vibrant, accurate, and maintains its color purity from a wider set of angles.

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What Is Color Gamut?

Take this into account the next time you buy a monitor, TV, or printer.

More Brightness, No Burn In

The less stuff you have between the light source and the surface of the screen, the brighter the image can be. Hisense’s RGB LED TVs are slated for 2025 promise a peak brightness of 10,000 nits! That is way beyond the brightest OLED panels, even LG’s tandem OLED that was demonstrated in January 2025, which maxes out at 4,000 nits.

While LCDs can have image retention, they are far, far less prone to it than OLEDs, and the brighter you run an OLED, the greater the chances of permanent image retention or “burn-in”. So RGB LEDs will absolutely smoke OLEDs when it comes to brightness, with virtually none of the risk.

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The New iPad Pro Has a Tandem OLED Screen, But What Is It and How Does It Work?

Two OLEDs are better than one.

A Lack of Bloom To Rival OLEDs

One of the big issues with LED LCDs, even the latest miniLEDs, is “bloom”. This is when light from the backlight in the bright part of an image spills over into the dark parts. Even on LCDs with thousands of dimming zones, you can see this when there’s something very bright next to something very dark.

Blooming on LED TV
LG

For example, my iPad Pro has a mini-LED screen, and if the brightness is turned up you can see bloom around white text on a black background, such as with subtitles or the end-credits of a movie. In content, you’d see this with laser blasts in space, or a big spotlight in the night sky.

RGB LEDs significantly reduce bloom thanks to the precise control of the brightness and color of each RGB backlight element. So you get contrast levels closer to that of an OLED, but you still get the brightness and color purity advantages.

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Cheaper Large Panels

Perhaps the biggest deal of all is price. While I expect Sony’s Bravia 10s to have a price that will make your eyes water even more than the nits rating, the fact is that RGB LED tech will be cheaper than OLEDs, especially as you scale up to larger panel sizes. While the price of smaller OLEDs (e.g. 55-inches or smaller) has come down significantly, making bigger OLEDs is hard, and when you get to around 100-inches prices go practically vertical.

So don’t be surprised if TVs larger than 100 inches are dominated by RBG LED technology in the future, because getting 90% of what OLED offers at a much lower price will likely be too hard to resist.

OLED Still Has Tricks up Its Sleeve

Dell 32 PLus 4K QD-OLED monitor sitting on a table playing a video.
Justin Duino / How-To Geek

With all that said, it’s not like OLED technology will stand still or is in major trouble. OLED’s perfect black levels, lack of bloom, and contrast levels are still better and will likely always be better. So those who are absolute sticklers for those elements of image quality will still buy them. Manufacturers are working on the issue of burn in and making it less of a problem with each new generation of screen.

lg b4

LG B4 OLED

$1000 $1700 Save
$700

OLED still has faster pixel response rates too, and lower latency (under the right circumstances), so gamers are also another audience who’ll likely want OLED technology to stick around. QD-OLEDs are upping the game when it comes to color vibrancy and gamut as well.


Ultimately, having different display technologies duke it out for supremacy is good for you and me, because it means better TVs and monitors at lower prices.



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