Samsung Galaxy S25 Plus vs Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB)
Quick Comparison
Both Samsung Galaxy S25 Plus and Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) comes with same RAM. In terms of display resolution, Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) has better resolution of 3200 x 1440 than Samsung Galaxy S25 Plus which has resolution of 3120 x 1440. Samsung Galaxy S25 Plus has more internal memory than Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB)
| Name | Samsung Galaxy S25 Plus | Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) |
| RAM | 12 GB | 12 GB |
|---|---|---|
| Display | 6.7 in | 6.8 in |
| Internal Memory | 256 GB | 128 GB |
| Battery | 4900 mAh | 5000 mAh |
| Camera | 50 MP + 12 MP + 10 MP Triple | 108 MP Quad |
| Price | Rs. 99999 | Rs. 101999 |
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Detailed Comparison
Price And Launch
The launch Date of the first phone is January 22, 2025. The cost of Samsung Galaxy S25 Plus is Rs. 99999. The launch Date of the second phone is January 14, 2021. The Expected cost of Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) is Rs. 101999.
Display comparison
Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) has larger screen size of 6.8 inches in comparison to Samsung Galaxy S25 Plus's 6.7 inch screen. Samsung Galaxy S25 Plus has LTPO AMOLED Screen type where as Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) has Screen type. Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) has display density of 515 PPI & Samsung Galaxy S25 Plus has only 513 PPI display density. In terms of screen to body ratio, Samsung Galaxy S25 Plus has better screen to body ratio of ~ 91.8% than Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB)'s ~ 89.8%. Samsung Galaxy S25 Plus has 20.5:9 aspect ratio where as Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) has 20:9 aspect ratio.
Memory comparison
Both mobiles come with 12 GB RAM Samsung Galaxy S25 Plus has more Internal Memory (256 GB) than Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) (128 GB).
Camera comparison
Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB)'s 108 MP Quad Rear Camera outclasses Samsung Galaxy S25 Plus's 50 MP + 12 MP + 10 MP Triple Rear Camera in terms of resolution. Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) will be better choice if you're looking to click lot of selfies as it has better 40 MP Front Camera in comparison to Samsung Galaxy S25 Plus's 12 MP Front Camera.
Technical comparison
Both the phones has Android Operating System but the first one runs on version 15 and the second one on 10 version.
Related Comparisons
Full Comparison
| Name | Samsung Galaxy S25 Plus | Samsung Galaxy S21 Ultra 5G (12GB RAM + 128GB) |
| General | ||
| Model | SM-S936B, SM-S936B/DS, SM-S936U, SM-S936U1, SM-S936W, SM-S936N, SM-S9360, SM-S936E, SM-S936E/DS,SM-S936BZSCINS | Galaxy S21 Ultra 5G |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | eSIM+eSIM SIM | Nano+Nano SIM |
| Device Type | Smartphone | Smartphone |
| Release Date | January 22, 2025 | January 14, 2021 |
| In The Box | Handset, Data Cable (Type C to C), Sim Ejection Pin | |
| Design | ||
| Dimensions | 75.8 x 158.4 x 7.3 mm | 75.6 x 165.1 x 8.9 mm |
| Weight | 190 g | 227 g |
| Bezel less | Yes | |
| Colors | Icy Blue, Mint, Navy, Silver Shadow | |
| Display | ||
| Type | Color LTPO AMOLED Screen (1B Colors) | Color Dynamic AMOLED 2X (16M Colors) |
| Touch | Yes | Yes |
| Size | 6.7 inches, 1440 x 3120 pixels, 120 Hz | 6.8 inches, 1440 x 3200 pixels, 120 Hz |
| Aspect Ratio | 20.5:9 | 20:9 |
| PPI | ~ 513 PPI | ~ 515 PPI |
| Screen to Body Ratio | ~ 91.8% | ~ 89.8% |
| Glass Type | Corning Gorilla Glass Victus 2 | Corning Gorilla Glass Victus |
| Features | HDR10+, 2600 nits (peak) | Always-on Display, HDR10+ |
| Notch | Yes, Punch Hole | Yes, Punch Hole |
| Memory | ||
| RAM | 12 GB | 12 GB |
| Storage | 256 GB | 128 GB |
| Storage Type | UFS 4.0 | UFS 3.1 |
| Card Slot | No | No |
| Connectivity | ||
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | Yes |
| VoLTE | Yes, Dual Stand-By | Yes, Dual Stand-By |
| Vo5G | Yes | |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Bluetooth | Yes, v5.4, A2DP, LE | Yes, v5.2, A2DP, LE |
| USB | Yes, USB-C v3.2 | Yes, USB-C v3.2 |
| USB Features | USB on-the-go, USB Charging | USB on-the-go, USB Charging |
| Extra | ||
| GPS | Yes, with A-GPS, Glonass, Beidou, Galileo, QZSS | Yes, with A-GPS, GLONASS, BDS, GALILEO |
| Fingerprint Sensor | Yes, In Display | Yes, In Display |
| Face Unlock | Yes | Yes |
| Sensors | Accelerometer, Gyro, Proximity, Compass, Barometer | Accelerometer, Gyro, Proximity, Compass, Barometer |
| 3.5mm Headphone Jack | No | No |
| NFC | Yes | Yes |
| Water Resistance | Yes, 1.5 m upto 30 min | Yes, 1.5 m upto 30 min |
| IP Rating | IP68 | IP68 |
| Dust Resistant | Yes | Yes |
| Extra Features | Photo Assist, Notes Assist, Drawing Assist, Circle to Search, Google Gemini (AI Mobile), 7 Years of Major OS Updates and 7 Years of Security Updates, Titanium Frame, Samsung Care+, Samsung Health, Samsung Wallet | |
| Camera | ||
| Rear Camera | 50 MP ƒ/1.8 (Wide Angle) 24mm (wide), 1/1.56", 1.0µm, dual pixel PDAF, OIS 10 MP ƒ/2.4 (Telephoto) 67mm (telephoto), 1/3.94", 1.0µm, PDAF, OIS, 3x optical zoom 12 MP ƒ/2.2 (Ultra Wide) 13mm, 120˚ (ultrawide), 1/2.55" 1.4µm, Super Steady video | 108 MP ƒ/1.8 10 MP ƒ/4.9 (Telephoto) 10 MP ƒ/2.4 (Telephoto) 12 MP ƒ/2.2 (Ultra Wide) |
| Auto Focus | Yes | Yes |
| Features | Bixby Vision, Dual Recording, Food, Hyperlapse, Night, Panorama, Photo, Portrait, Portrait Video, Pro, Pro Video, Single Take, Slow Motion, Video | Auto-HDR, Panorama |
| Video Recording | 8K @ 30 fps UHD, 4K @ 60 fps UHD, 1080p @ 30 fps FHD | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 240/30/60 fps FHD, 720p @ 960 fps HD |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 12 MP ƒ/2.2 (Wide Angle) Punch Hole | 40 MP ƒ/2.2 (Wide Angle) Punch Hole, Autofocus |
| Front Video Recording | 4K @ 60 fps UHD, 1080p @ 60 fps FHD | 4K @ 30/60 fps UHD, 1080p @ 30 fps FHD |
| Technical | ||
| OS | Android v15 | Android v10 |
| Custom UI | One UI 7 | |
| Chipset | Qualcomm Snapdragon 8Elite | Samsung Exynos 2100 |
| CPU | 4.47 GHz, Octa Core Processor | 2.9 GHz, Octa Core Processor |
| Core Details | 2x4.47 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M | 1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55 |
| GPU | Adreno 830 | Mali-G78 MP14 |
| Java | No | No |
| Browser | Yes | Yes |
| Multimedia | ||
| Yes | Yes | |
| Music | MP3, M4A, 3GA, AAC, OGG, OGA, WAV, AMR, AWB, FLAC, MID, MIDI, XMF, MXMF, IMY, RTTTL, RTX, OTA, DFF, DSF, APE | Yes |
| Video | MP4, M4V, 3GP, 3G2, AVI, FLV, MKV, WEBM | Yes |
| FM Radio | No | No |
| Document Reader | Yes | Yes |
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 4900 mAh, Li-ion Battery | 5000 mAh, Li-Po Battery |
| Fast Charging | Yes, 45W | Yes, 25W Fast Charging |
| Wireless Charging | Yes, 15W | Yes, 15W |
| Reverse Charging | Yes | Yes, 4.5W |
| Reverse Wireless Charging | Yes, 4.5W | |