Mobile World Congress 2025 has brought the tech world to the busy streets of Barcelona to tout its latest, greatest innovations. And we've seen plenty in our time here, from quirky concepts to products you can actually buy. (Of course, we've also eaten our weight in tapas and maybe even tried a few local beers.)As the show draws to a close, we wanted to give you an overview of the top products we saw. Though not all of them are things you can buy, they're all innovative in their own way, offering something that makes them stand out from the crowd -- a design, an idea or even just a price.Here, then, are CNET's top picks from Mobile World Congress 2025.Nothing Phone 3A and 3A Pro Here is the Nothing Phone 3A on the left and Nothing Phone 3A Pro on the right. Andrew Lanxon/CNETLondon-based tech company Nothing is best known for its affordable Android phones that light up on the back, and the new Phone 3A and 3A Pro follow that format. The two models share most of their key specs, including a decent Snapdragon 7S Gen 3 processor, a vibrant 6.7-inch display and a 5,000-mAh battery.And while both have 50-megapixel main cameras, the 3A Pro has a more advanced autofocus system and a periscope camera for better-looking zoom shots. I put it to the test around Barcelona and got some pretty cool images. Watch this: Unboxing the Nothing Phone 3a Pro Shot With a 3a Pro's Camera 00:37 Crucially, both phones are also affordable, with the 3A starting at $379, and the 3A Pro starting at $459. Not bad for phones that include Google's Gemini AI tools and offer six years of software and security support.Read more: Samsung Display Wowed Us With Its Concept Devices at MWC 2025Samsung Galaxy A26, A36, A56 phones The Samsung Galaxy A26, A36 and A56. Andrew Lanxon/CNETWe can't talk about affordable phones without mentioning Samsung's new Galaxy A series. The company took the wraps off the latest additions to the range, including the $300 Galaxy A26, the $400 A36 and the $500 A56. (Why isn't there an A46, I wonder.)All three have the same 6.7-inch display and 5,000-mAh battery, but spending more on one of the higher-end models will get you a more-powerful processor, more RAM and a slightly more potent camera setup. AI features baked into Samsung's One UI -- as well as Google Gemini and Circle to Search -- are available on all three.Xiaomi's modular camera concept The Xiaomi modular camera concept. Andrew Lanxon/CNETXiaomi's 15 Ultra, with its awesome rear cameras, might really be the best phone of the show, but it's not that far removed from last year's 14 Ultra, and I had my eye on something else from the company.Its "modular optical system" as Xiaomi calls it, is essentially a camera lens and large sensor that attaches to the phone, giving you a pro-quality imaging setup that still uses your phone as the brain, to take advantage of instant editing and social sharing. It's not dissimilar to Sony's QX10 from 2013, which was arguably ahead of its time, but I really liked it as an idea. MWC 2025: Xiaomi's Photography-Focused 15 Ultra Is a Powerhouse See all photos Sadly, Xiaomi's lens is very much being shown off as a concept. I really hope this one makes it as far as the shop shelves. As a professional photographer, I love the idea of having something that lets me get higher-quality images than my phone, without the added bulk of carrying a full-size camera and lens setup.HMD Fusion X1 phone for teens The HMD Fusion X1 is a stepping stone between an offline childhood and an online adulthood. Katie Collins/CNETThough we normally talk about which smartphones have the most power or the best camera or the longest battery life, HMD's Fusion X1 serves a very different purpose than most phones. It's aimed squarely at young teens and allows parents to limit access -- or screen time -- from their own phone, to help their kids develop a healthier relationship with technology and social media."Whereas most phones with parental controls either rely on an app that can be deleted or bypassed, the Fusion X1 combines app-based controls baked deep into its version of Android OS." CNET's Katie Collins explains in her hands-on with the device. "This creates a locked-down safe space where kids can still have limited access to Snapchat, WhatsApp and TikTok -- if their parents agree."The HMD Fusion X1 will be available in May for 229 (about $290 converted).Read more: RedMagic 10 Pro's $1,499 Golden Saga Phone Comes to MWC 2025Aurzen Zip folding projector The Aurzen Zip projector. Tara Brown/CNETProjectors tend to be bulky items you'd usually mount to your ceiling and leave in place. The Aurzen Zip is a different beast altogether. Using a folding mechanism that makes it look a bit like a Samsung Galaxy Z Flip 6, the Zip can stand on a surface and project your movies up to 80 inches in size, and then fold down into something small enough to fit in your pocket.It works over Apple AirPlay, allowing you to stream Netflix videos from your iPhone, though an HDMI adapter will also be available, if you want to plug in your laptop to stream other content. Its battery provides up to 1.5 hours of use, so watching Dune 2 will require you to plug it in, but it features fast charging to get the juice back quickly. MWC 2025: The Coolest Phones We've Seen at the Show See all photos Though its 720-pixel resolution won't suit cinephiles, its small size makes it great for taking 'round to your friend's place for a movie night, traveling, or simply using in a space-challenged apartment.Following its successful Kickstarter launch, the Zip will go on general sale later this month, starting at $300.Read more: RealMe's Pro 14 Color-Changing Phone Takes a Bath at MWC 2025Tecno Spark Slim The Tecno Spark Slim is thinner than a pencil. It felt super light in my hand. Abrar Al-Heeti/CNETThough rumors suggest Samsung's teased Galaxy S25 Edge may be just under 6 millimeters thick, Tecno's Spark Slim concept takes that even further. At just 5.75mm, it purports to be the world's slimmest phone, and in person it really does look almost bizarrely skinny.Often, slim phones compromise on battery life, simply because there's less space to fit all those cells. But somehow Tecno has managed to squeeze in a whopping 5,200-mAh battery, along with 50-megapixel main and ultrawide cameras.It's very much still a concept, so some of these specs should be taken with a pinch of salt. Still, I'd love to see a phone like this that focuses on being easier to hold and sliding into the pocket of a pair of skinny jeans. The company says the device would be made of sturdy materials, but I am concerned about how easily it might bend, especially if I were to sit down with it in my back pocket. That would be a nasty way for any phone to go.Honorable mention: Lenovo solar powered laptop It's a laptop with solar cells built into its lid. Tharon Green/CNETLenovo has a host of concept devices at the show this year, including some neat-looking screens you can attach to your laptop's main one to extend your workspace. But our favorite is the solar-powered laptop, which features an array of solar cells on its lid.Lenovo says these cells are especially efficient and that after just 20 minutes of direct sunlight they can provide enough juice for an hour of video playback. Still, as CNET's Josh Goldman points out, it's less about powering the laptop entirely with solar, and more about extending the battery life when you can.Read more: Honor Teases Agentic AI Phone That Will 'Revolutionize' Our DevicesIt's certainly a neat idea, though I can't imagine it being especially practical for everyday use. For one, who wants to work on their laptop in bright sunlight? And crucially, when you're working on your laptop, the back of the screen will likely be angled down, away from the sunlight, so it can only really recharge when it's closed and not in use. Still, we're always super keen to hear about ways that tech firms are making use of renewable energy, even if it's sticking solar panels on a poncho.