| Hardware and OS | Samsung Galaxy S21 Plus 5G | |
| Operating system | Android 11, One UI 3.1 | |
| Processor | Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International / Octa-core (1x2.84 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680 - USA/China | |
| GPU | Mali-G78 MP14 - International / Adreno 660 - USA/China | |
| RAM | 8 GB | |
| Internal Storage | 128 GB, 256 GB | |
| Memory Card Slot | No | |
| User Interface | Yes | |
| Display | Samsung Galaxy S21 Plus 5G | other phones |
| Type | Dynamic AMOLED 2X | |
| Size | 6.7 inches | |
| Resolution | 1080 x 2400 pixels | |
| Colors | 16M | |
| Pixel Density | 394 PPI | |
| Touchscreen | Yes | |
| Protection | Corning Gorilla Glass Victus | |
| Features | Always-on display, | |
| Connectivity | Samsung Galaxy S21 Plus 5G | other phones |
| 4G Network | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G996U1 | |
| 5G Network | SA/NSA/Sub6/mmWave | |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot | |
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | |
| NFC | Yes | |
| USB | USB Type-C 3.2, USB On-The-Go | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (CA), 5G | |
| SIM | Nano SIM | |
| Dual SIM | Single SIM (Nano-SIM and/or eSIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by) | |
| Wireless Charging | Yes | |
| Camera | Samsung Galaxy S21 Plus 5G | other phones |
| Main camera | 12 MP (wide), 64 MP (periscope telephoto) 1.1x optical zoom, 3x hybrid zoom, 12 MP (ultrawide) Super Steady video. | |
| Features | LED flash, auto-HDR, panorama | |
| Image | 4320p | |
| Selfie camera | 10 MP (wide) | |
| Multimedia | Samsung Galaxy S21 Plus 5G | other phones |
| Loudspeaker | Yes | |
| Handsfree | Yes | |
| Radio | FM radio (Snapdragon model only; market/operator dependent) | |
| Video Playback | Yes | |
| Video Out | Yes | |
| Ring Tones | Yes | |
| 3.5 mm Jack | No | |
| Design | Samsung Galaxy S21 Plus 5G | other phones |
| Dimensions | 161.5 x 75.6 x 7.8 mm | |
| Waterproof | IP68 dust/water resistant (up to 1.5m for 30 mins) | |
| Weight | 200 g | |
| Battery | Samsung Galaxy S21 Plus 5G | other phones |
| Capacity | Li-Po 4800 mAh, Fast charging 25W, USB Power Delivery 3.0, Fast Qi/PMA wireless charging 15W, Reverse wireless charging 4.5W. | |
| Placement | Non-removable | |
