Last Updated & Fact Checked: March 21, 2026
Are you trying to decide between the Samsung Galaxy S10 Plus and the Samsung Galaxy S21 Ultra?
Product Versus will provide you with all the product details so you can quickly compare the facts to find which product is right for you – the Samsung Galaxy S10 Plus or the Samsung Galaxy S21 Ultra – and find out exactly what the differences are.
Both the Samsung Galaxy S10 Plus and the Samsung Galaxy S21 Ultra are quality products, so read on to find out which one is best for your needs!
Samsung Galaxy S10 Plus quick facts
Samsung Galaxy S21 Ultra quick facts
Samsung Galaxy S10 Plus product details
Bestseller No. 2
Samsung Galaxy S10 128GB 6.1" 4G LTE Unlocked, Prism Black (Renewed)
- 6.1" Dynamic AMOLED, 3040 x 1440 (Quad HD+), 16M, Ultrasonic Fingerprint ID, Single SIM, 15W Charger
- 128GB Storage, 8GB RAM, MicroSD (Up to 512GB), Snapdragon 855, Octa-core, Adreno 640, 3400 mAh battery
- Rear Camera: 12MP Wide-angle + 16MP Ultra Wide + 12MP Telephoto, Front Camera: 10MP, NFC, Bluetooth 5.0
- 2G bands GSM 850 / 900 / 1800 / 1900, 3G HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100, 4G LTE band 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 66, 71
- Fully Unlocked Version. Compatible with Most GSM + CDMA Carriers like T-Mobile, AT&T, MetroPCS, etc. Will Also work with CDMA Carriers Such as Verizon, Sprint.
Samsung Galaxy S21 Ultra product details
Bestseller No. 1
Samsung Galaxy S21 Ultra 5G, US Version, 128GB, Phantom Black - Unlocked (Renewed)
- The Samsung Galaxy S21 Ultra (Renewed) is a premium smartphone with a 6.8-inch AMOLED display, 120Hz refresh rate, and powerful camera system featuring a 108MP main lens and up to 100x zoom. It supports the S Pen, offers strong performance with 5G connectivity, and is ideal for users seeking flagship features at a better value.
Bestseller No. 2
Samsung Galaxy S21 Ultra 5G, US Version, 256GB, Phantom Black - Unlocked (Renewed)
- The Galaxy S21 Ultra features a massive 6.8-inch Dynamic AMOLED 2X display with Quad HD+ resolution, HDR10+ support, and an adaptive 120Hz refresh rate that scales dynamically to deliver ultra-smooth visuals while conserving battery life.
- Its rear camera system is a powerhouse, combining a 108MP wide sensor, 12MP ultra-wide lens, and two telephoto lenses (10MP each) with 3x and 10x optical zoom. With up to 100x Space Zoom, advanced AI scene optimization, and laser autofocus, the S21 Ultra captures extraordinary detail, whether shooting landscapes, zoomed-in subjects, or 8K video content.
- The phone is powered by Snapdragon 888 (U.S.) or Exynos 2100 (global) paired with up to 16GB of RAM, making it exceptionally fast for gaming, multitasking, and demanding productivity apps. Coupled with Samsung DeX support, the Ultra can be used like a full desktop workstation for editing, presentations, and professional workflows.
- The Galaxy S21 Ultra offers a 5,000 mAh intelligent adaptive battery with fast wired charging, fast wireless charging, and reverse wireless charging. Its AI-driven battery management optimizes power use based on your habits, allowing longer usage without frequent recharging—even with heavy multitasking or 5G connectivity.
- Security and connectivity are top-tier, featuring Samsung Knox Vault for advanced protection of sensitive data, ultrasonic in-display fingerprint scanning, facial recognition, and ultra-fast 5G and Wi-Fi 6E support. Enhanced stereo speakers with Dolby Atmos create immersive audio, making the device ideal for gaming, streaming, and professional multimedia experiences.
Bestseller No. 3
Samsung Electronics Samsung Galaxy S21 Ultra 5G | Factory Unlocked Android Cell Phone | US Version 5G Smartphone | Pro-Grade Camera, 108MP High Res | 128GB, Black (SM-G998UZKAXAA) (Renewed)
- Item Package Dimension- 6.9299999929314L X 5.6299999942574W X 1.3399999986332H Inches
- Item Package Weight - 0.78925489796 Pounds
- Item Package Quantity - 1
- Product Type - Cellular Phone
New products & alternatives to the Samsung Galaxy S10 Plus and the Samsung Galaxy S21 Ultra
New
Samsung Galaxy S10 Plus SM-G975U 128GB 8GB Unlocked Smartphone White
- Dynamic AMOLED screen delivers immersive visuals and crisp detail with HDR10+ support.
- Ultra-wide, wide, and telephoto lenses for high-quality photos and 4K UHD video recording.
- Equipped with 8GB RAM and Snapdragon 855 for smooth multitasking and gaming.
- Ample space for apps, photos, and media; expandable via microSD up to 512GB.
- Triple rear lenses (wide, ultra-wide, and telephoto) and dual front cameras capture detailed photos and videos.
New
Samsung Galaxy S10+ Unlocked Android Cell Phone | US Version | 512GB of Storage | Fingerprint ID and Facial Recognition | Long-Lasting Battery | Ceramic White (Renewed)
- Updated Camera Features: Get the more powerful S10 with a software update that gives you all new features including Single Take AI, Pro Video and more
- High-quality camera lenses: With a full set of pro lenses, including ultrawide for stunning landscapes and micro-zoom for epic details, Galaxy S10+ is a studio in your pocket, featuring live video bokeh, precision audio focus and super-stabilization
- Photos and video with one tap: capture multiple images and video all at once, in one tap. Lenses, effects and filters capture the best of every moment, every time
- Capture with pro-grade tool set made for masters: Control your camera settings with Pro-Video Mode to adjust the exposure, focus and more to bring your creative vision to life
- Share more, quicker: The Galaxy S10+ can now connect to and share with up to 5 other compatible devices at the same time using Bluetooth and WiFi, with no limits on content type or file size
New
Samsung Galaxy S10 SM-G973U 128GB 6GB Unlocked Black
- 6.1-inch Quad HD+ Dynamic AMOLED Infinity-O screen with edge-to-edge clarity and HDR10+ support.
- Qualcomm Snapdragon 855 processor with 6GB RAM for fast, responsive multitasking.
- Triple rear camera system (12MP wide, 12MP telephoto, 16MP ultra-wide) plus a 10MP front camera for stunning photos and videos.
- Intelligent 3,400mAh battery adapts to usage, plus Wireless PowerShare to charge other devices.
- 128GB internal storage, expandable via microSD card up to 512GB.
New
Samsung Galaxy S10 Plus SM-G975U 128GB 6GB Unlocked Black
- Stunning edge-to-edge screen with vibrant colors and ultra-sharp resolution.
- Equipped with Qualcomm Snapdragon processor and 6GB RAM for smooth multitasking and fast app performance.
- Capture pro-quality photos with wide, ultra-wide, and telephoto lenses, plus a 10MP front camera.
- 128GB internal storage with microSD expansion support (up to 512GB).
- Ultrasonic fingerprint sensor, fast wireless charging, reverse wireless charging, and IP68 water/dust resistance.
New
Samsung Galaxy S25+ Cell Phone, 512GB Smartphone, Unlocked Android, AI Night Mode Camera, Snapdragon 8 Elite Fast Processor, ProScaler Display, 4900mAh Battery, 2025, US 1 Yr Warranty, Mint
- MULTIPLE TASKS WITH ONE ASK: Streamline your day with an assistant that gets you. Ask it to Google search for a pet-friendly vegan restaurant nearby and text it to your friend— your Galaxy S25+ handles multiple tasks with a single ask.¹
- START THE DAY SMARTER: Stay one step ahead with a phone that gives you the info you need before you even know you need it with Now Brief.²
- REDUCE THE NOISE. REVEAL THE MAGIC: AI Camera with Audio Eraser lets you capture vibrant videos in low light and minimize unwanted noises so you can relive your favorite moments with fewer distractions.³
- BRING OUT THE BEST IN EVERY FACE: Capture every portrait with clarity and confidence on the Galaxy S25+ Series. The advanced portrait features adjust skin tones and preserve natural textures, giving every shot a polished, professional look.
- MORE POWER TO YOU: Reimagine what’s possible with the Galaxy S25+, featuring our most powerful processor yet. Effortlessly translate your calls, slow down a video, or edit your photos without skipping a beat.
Our conclusion on the Samsung Galaxy S10 Plus vs Samsung Galaxy S21 Ultra
Both the Samsung Galaxy S10 Plus and the Samsung Galaxy S21 Ultra are high quality products and we are sure you will be happy with either one. In the end it comes down to your budget and the value for money you are looking for.
Either way, the Samsung Galaxy S10 Plus and the Samsung Galaxy S21 Ultra are both excellent products that will more than do their job!