So, the Samsung Galaxy S21 Ultra actually doesn't have expandable storage. This was a bit of a change starting with the S21 series, as mentioned in the manufacturer's product description and noted by some tech sites like TechRadar and PCMag.

In older Samsung models, like the Galaxy S20, you could pop in a microSD card to increase your storage. That was a handy feature for many folks.

But with the S21 lineup, Samsung decided to leave that out. It's something that has stirred up a few discussions among fans who liked having that option.

If you're wondering about storage space, Samsung offers several internal storage options with this phone. You can pick from models with up to 512GB, which is pretty decent for most people's needs.

If you know you'll be storing tons of photos, videos, and apps, it might be worth going for one of those higher storage models to avoid running out of space later on.

And don't forget about cloud storage! There are lots of services out there—many with free plans—that can help you manage your files online and free up some room on your device.

Of course, some folks miss the microSD card slot, especially those who liked the flexibility it gave.

But with the variety of available storage models and cloud options, many people still find the S21 Ultra fits their needs quite well.

Plus, Samsung has made other improvements in this model that might catch your eye if you're considering it.

The camera on the Samsung Galaxy S21 Ultra is seriously impressive and one of its main highlights. From our research, it's got a powerful quad-camera setup, which means you can take all kinds of great photos. The main camera has a massive 108 MP sensor that captures super detailed and vibrant images, even if the lighting isn't perfect. If you love photography, you'll probably appreciate that level of detail.

The S21 Ultra also features a 10x optical zoom, with something called a 100x Space Zoom for faraway shots. Many find this zoom feature pretty fantastic for taking photos of distant subjects without losing much quality. Plus, its Night Mode works wonders in low-light settings, which a lot of folks seem to really like.

For wide shots, there's a 12 MP ultra-wide camera, perfect for capturing landscapes or big group photos. If you're into video, you'll be happy with the 8K video recording option—it's super crisp.

Selfies come out nice too, thanks to the 40 MP front camera. It produces sharp and vibrant images and can record videos in 4K, so your video calls will be top-notch.

Samsung also packed in some smart software goodies to make your photos even better, like AI enhancements and settings that adjust automatically based on the scene.

On a side note, the phone might not come with a charging brick, a move some manufacturers make to cut down on e-waste.

And the phone's 'Factory Unlocked' status is great if you want flexibility with carriers, though you'll want to check that your carrier supports eSIM if you're planning to use it outside the US.

So if having a killer camera is high on your phone wishlist, the S21 Ultra is a strong pick. Just be sure your network lines up with the device's features, especially regarding SIM options.

So, if you're curious about the battery life on the Samsung Galaxy S21 Ultra, it's pretty solid. It has a 5,000mAh battery, which, according to the manufacturer, should last you through a whole day even with heavy usage. Of course, your mileage may vary depending on what you're doing with it.

Our research suggests that for everyday stuff like surfing the web, checking social media, or streaming, you should be good to go on a single charge. Even when you're doing more battery-draining things like gaming or shooting high-res videos, it tends to hold up pretty well, usually making it into the evening or even longer.

One thing to bear in mind is that the phone's high refresh rate screen and 5G can drain the battery quicker. The good part is that the phone adjusts the refresh rate based on what you're doing, which helps save some juice.

If you're somewhere with spotty 5G and you're worried about battery, switching to 4G LTE can help you conserve power.

Also, just a heads-up, the Galaxy S21 Ultra supports fast charging with a 25W charger, so it's quick to power up when you're in a pinch. You've also got wireless and reverse wireless charging, so you can even charge other gadgets like your earbuds if you need to.

In general, the S21 Ultra's battery life is pretty great for a top-tier phone. It can handle a lot, and with some smart use of its features, keeping charged throughout the day shouldn't be too tricky.