Can I Use My S24 Ultra Case on the New S25 Ultra?

Wondering if your good old Galaxy S24 Ultra case fits the new S25 Ultra?

First off, if you’ve upgraded to the Samsung Galaxy S25 Ultra, good for you! This premium device is worth the dime – improved screen, S Pen enhancements, and brighter, more vibrant display – especially for those upgrading from older Samsung models.

It’s tempting to reuse your old S24 Ultra case, but hold that thought. In this guide, we’ll have to compare the Galaxy S25 Ultra and its predecessor, the S24 Ultra, to find out why it’s best to get a new S25 Ultra case.

Many users look to save money or simply love their old case enough to want to keep using it. But here’s the short answer: in most cases, a Galaxy S24 Ultra case will not fit the Galaxy S25 Ultra perfectly, and using it will compromise protection or functionality.

While it may seem like it works, it's not recommended due to subtle differences in design and dimensions. Even if the height and width of the S25 Ultra are nearly the same as the S24 Ultra, a 1-2mm shift in camera size or location is enough to make a tight-fitting case unusable or awkward.

One of the biggest compatibility issues comes down to the camera cutout. If the S25 Ultra has a slightly larger sensor or a redesigned housing for its periscope lens or new sensors, the S24 Ultra case might partially block the lens or flash. This doesn’t just look odd. It can actually affect photo quality by introducing shadows or lens flare.

The same goes for the button alignment; if your volume rocker or power button has shifted even slightly, your old case might make pressing them feel stiff or unresponsive.

Here’s a detailed breakdown of why the key differences between the two devices matter, and what you should know before snapping your old case onto your brand-new phone.

If you’re using a silicone or a loose-fitting TPU case, you might be able to work your old case with the S25 Ultra, but even then, the fit won’t be ideal. You might end up with gaps near the ports, misaligned cutouts, or buttons that don’t click properly. On the other hand, if you’re into hard shell cases, these materials have less tolerance and can pop off entirely with pressure at any time, defeating the purpose of using a case.

Even our best Samsung S25 Ultra slim case, made of 600D aerospace-grade aramid fiber, will not fit the S24 Ultra, at least in a way that you would expect. It is a modern-day case designed with utmost precision. It hugs the device tightly and relies on perfect alignment to maintain both form and function. That’s why even a millimeter shift in camera layout or button placement means it can’t be reused between generations.

If you're looking for an S25 Ultra case with the precise craftsmanship you need, check out this honest feedback from @MichaelsTecTalk on X:

Another growing consideration is wireless charging and the Apple-like MagSafe accessory support. The S25 Ultra supports magnetic accessories through a third-party intervention, making case alignment even more critical.

A case designed specifically for the Galaxy S24 Ultra may not have magnets in the right spot (if at all), making it unreliable for MagSafe-style chargers, magnetic mounts, or wallet accessories. Even if your old case technically fits, it might interfere with S25 Ultra’s Qi2 wireless charging if it isn’t properly aligned or if the materials were optimized for the previous model’s coil placement.

See live in action how an S25 Ultra-specific case harnesses the magnetic functionality through strong and precise alignment:

Some users may try to test the old case on the new device out of curiosity. If you do this, proceed carefully. You’ll likely notice some of the following issues right away:

• The camera module isn’t perfectly centered in the cutout.

• The case feels tighter or looser than it should.

• Button presses feel mushy or stiff, which indicates misalignment.

• Port cutouts (USB-C, speaker, mics) might not line up, affecting charging or audio quality.

Even if the phone technically fits inside the S24 Ultra case, those small misalignments can compromise your user experience or even your phone’s safety in a drop. If you’re investing in a phone like the Galaxy S25 Ultra, it’s worth investing in a case with a better design.

There are rare exceptions. If Samsung didn’t change the dimensions or camera layout much (as they sometimes do between S-series generations), it’s possible that some stretchy cases might still work in a pinch. However, this is more of a temporary workaround than a long-term solution.

Additionally, third-party case makers often update their designs based on CAD leaks and spec sheets before launch. So even if your S24 Ultra case came from a top brand like FiberBorne or OtterBox, there’s a high chance it was custom-cut specifically for that model and won’t fit the S25 Ultra well.

If you’ve just bought the Galaxy S25 Ultra, the best thing you can do is get a case that’s built for it. Whether you prefer an S25 Ultra slim or rugged cover, make sure it’s labeled as compatible with the device. This ensures not only a better fit but also proper alignment for features like:

• Camera protection

• Button responsiveness

• Wireless charging and MagSafe accessory use

• Accurate port cutouts

Many brands now also offer eco-friendly cases , drop-tested protection, and magnetic ring compatibility designed specifically for the S25 Ultra’s dimensions. These are well worth considering if you want to protect your new device properly without relying on an ill-fitting older case.

So, will your Galaxy S24 Ultra case fit your Galaxy S25 Ultra? Technically, it might slip on. But realistically, the answer is no, not properly. It won’t offer the same level of protection, might interfere with camera or button usage, and could even affect wireless charging.

Your best bet is to look for a Galaxy S25 Ultra case that matches your style and protection needs. When you’re dealing with precision materials like aramid fiber, there’s no room for guesswork; the fit has to be exact. So while flexible silicone cases might give you a temporary pass, premium slim cases demand proper model-specific engineering. If you want your phone to look clean, feel responsive, and stay protected, it’s worth investing in a Galaxy S25 Ultra case that’s built for it, down to the last detail.