Samsung Galaxy S21 Ultra (12GB RAM + 128GB) vs Samsung Galaxy A15 5G (6GB RAM + 128GB)
Here you can compare Samsung Galaxy S21 Ultra (12GB RAM + 1… and Samsung Galaxy A15 5G (6GB RAM + 128GB). Comparing Samsung Galaxy S21 Ultra (12GB RAM + 1… vs Samsung Galaxy A15 5G (6GB RAM + 128GB) on Smartprix enables you to check their respective specs scores and unique features. It would potentially help you understand how Samsung Galaxy S21 Ultra (12GB RAM + 1… stands against Samsung Galaxy A15 5G (6GB RAM + 128GB) and which one should you buy The current lowest price found for Samsung Galaxy S21 Ultra (12GB RAM + 1… is $269 and for Samsung Galaxy A15 5G (6GB RAM + 128GB) is $149.99. The details of both of these products were last updated on Jul 11, 2026.
| Specification | Samsung Galaxy S21 Ultra (12GB RAM + 1… | Samsung Galaxy A15 5G (6GB RAM + 128GB) |
|---|---|---|
| Internal Memory | 128 GB | 128 GB |
| CPU | 2.9 GHz, Octa Core Processor | 2.2 GHz, Octa Core Processor |
| RAM | 12 GB | 6 GB |
| Display | 6.8 inches, 1440 x 3200 pixels, 120 Hz | 6.5 inches, 1080 x 2340 pixels, 90 Hz |
| Rear Camera | 108 MP ƒ/1.8 10 MP ƒ/4.9 (Telephoto) 10 MP ƒ/2.4 (Telephoto) 12 MP ƒ/2.2 (Ultra Wide) | 50 MP ƒ/1.8 (Wide Angle) 5 MP ƒ/2.2 (Ultra Wide) 2 MP ƒ/2.4 (Macro) |
| Price | $269 | $149.99 |
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Overview
| Specs Score | 53 / 100 | 82 / 100 Better Specs |
| Display Resolution | 1440 x 3200 pixels Better Resolution | 1080 x 2340 pixels |
| Screen To Body Ratio | ~ 89.8% Less Bezels | ~ 84.3% |
| RAM | 12 GB More RAM | 6 GB |
| CPU Clock Speed | 2.9 GHz Faster Clock Speed | 2.2 GHz |
| Rear Camera | 108 MP Quad Better Camera Resolution | 50 MP + 5 MP + 2 MP Triple |
| Front Camera | 40 MP Better Front Camera Resolution | 13 MP |
| Weight | 227 g | 200 g Lighter |
| Thickness | 8.9 mm | 8.4 mm Slimmer |
| Unique Features | No Water Resistant No Wireless Charging Reverse Charging | 3.5mm Audio Jack No Memory Card Support No No |
General
| Country of Origin | Vietnam | |
| Model | Galaxy S21 Ultra 5G | SM-A156 |
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM |
| Dual Sim | Yes | Yes |
| Sim Size | Nano+Nano SIM | Nano+Nano SIM |
| Device Type | Smartphone | Smartphone |
| Release Date | January 14, 2021 | December 11, 2023 |
| In The Box | Galaxy A15, USB-C Cable, SIM Tray Ejector, Quick Start Guide |
Design
| Dimensions | 75.6 x 165.1 x 8.9 mm | 76.8 x 160.1 x 8.4 mm |
| Weight | 227 g | 200 g |
| Colors | Brave Black, Personality Yellow, Magical Blue, Optimistic Blue |
Display
| Type | Color Dynamic AMOLED 2X (16M Colors) | Color Super AMOLED Infinity-U |
| Touch | Yes | Yes |
| Size | 6.8 inches, 1440 x 3200 pixels, 120 Hz | 6.5 inches, 1080 x 2340 pixels, 90 Hz |
| Aspect Ratio | 20:9 | 19.5:9 |
| PPI | ~ 515 PPI | ~ 396 PPI |
| Screen to Body Ratio | ~ 89.8% | ~ 84.3% |
| Glass Type | Corning Gorilla Glass Victus | |
| HDR Support | Yes, HDR10+ | |
| Features | Always-on Display, HDR10+, Curved Display | 800nits (peak) |
| Notch | Yes, Punch Hole | Yes, Water Drop Notch |
Memory
| RAM | 12 GB | 6 GB |
| Storage | 128 GB | 128 GB |
| Storage Type | UFS 3.1 | |
| Card Slot | Yes, upto 1 TB |
Connectivity
| GPRS | Yes | Yes |
| EDGE | Yes | Yes |
| 3G | Yes | Yes |
| 4G | Yes | Yes |
| 5G | Yes | Yes |
| VoLTE | Yes, Dual Stand-By | |
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot |
| Bluetooth | Yes, v5.2, A2DP, LE | Yes, v5.3 |
| USB | Yes, USB-C v3.2 | Yes, USB-C v2.0 |
| USB Features | USB on-the-go, USB Charging | USB Tethering, USB on-the-go, USB Charging, USB Storage |
Extra
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | Yes |
| Fingerprint Sensor | Yes, In Display | Yes, Side |
| Face Unlock | Yes | |
| Sensors | Accelerometer, Gyro, Proximity, Compass, Barometer | Accelerometer, Gyro, Compass |
| 3.5mm Headphone Jack | No | Yes |
| NFC | Yes | Yes |
| Water Resistance | Yes, 1.5 m upto 30 min | |
| IP Rating | IP68 | |
| Dust Resistant | Yes | |
| Extra Features | 4 Times OS Upgrades and 5 Years Security Updates, Knox Security |
Camera
| Rear Camera | 108 MP ƒ/1.8 10 MP ƒ/4.9 (Telephoto) 10 MP ƒ/2.4 (Telephoto) 12 MP ƒ/2.2 (Ultra Wide) | 50 MP ƒ/1.8 (Wide Angle) 5 MP ƒ/2.2 (Ultra Wide) 2 MP ƒ/2.4 (Macro) |
| OIS | Yes | |
| Auto Focus | Yes | Yes |
| Features | Auto-HDR, Panorama | Panorama, HDR, Digital Zoom up to 10x |
| Video Recording | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 240/30/60 fps FHD, 720p @ 960 fps HD | 1080p @ 30 fps FHD |
| Flash | Yes, LED | Yes, LED |
| Front Camera | 40 MP ƒ/2.2 (Wide Angle) Punch Hole, Autofocus | 13 MP ƒ/2 (Wide Angle) |
| Front Video Recording | 4K @ 30/60 fps UHD, 1080p @ 30 fps FHD | 1080p @ 30 fps FHD |
Technical
| OS | Android v10 | Android v14 |
| Chipset | Samsung Exynos 2100 | Mediatek Dimensity 6100 Plus |
| CPU | 2.9 GHz, Octa Core Processor | 2.2 GHz, Octa Core Processor |
| Core Details | 1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55 | 2xCortex-A76@2.2 GHz & 6xCortex-A55@2.0 GHz |
| GPU | Mali-G78 MP14 | Mali-G57 MC2 |
| Java | No | No |
| Browser | Yes | Yes |
Multimedia
| Yes | Yes | |
| Music | Yes | Yes |
| Video | Yes | Yes |
| FM Radio | No | No |
| Document Reader | Yes | Yes |
Battery
| Type | Non-Removable Battery | Non-Removable Battery |
| Size | 5000 mAh, Li-Po Battery | 5000 mAh |
| Fast Charging | Yes, 25W Fast Charging | Yes, 25W |
| Wireless Charging | Yes, 15W | |
| Reverse Charging | Yes, 4.5W |
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