Samsung Galaxy S21 FE 5G Dual SIM vs Samsung Galaxy S21 Dual SIM
| Type | Touch | Touch | 
| Waterproofness & dust-resistance | IP68 | IP68 | 
| Dimensions | 155.70 x 74.50 x 7.90 mm | 151.70 x 71.20 x 7.90 mm | 
| Weight | 177.00 g | 169.00 g | 
| Display size | 6.40" | 6.20" | 
| Display | Color / Dynamic AMOLED 16M colors 120 Hz 1080 x 2400 px (6.40") 411 ppi | Color / Dynamic AMOLED 16M colors 120 Hz 1080 x 2400 px (6.20") 424 ppi | 
| Display protection | Corning Gorilla GlassBuy screen protector | Corning Gorilla GlassBuy screen protector | 
| Additional display | ||
| Protection of the secondary display | ||
| Standard battery | Li-Ion 4500 mAhBuy powerbank | Li-Ion 4000 mAhBuy powerbank | 
| Quick battery charging | USB Power Delivery 3.0 | Fast Charging | 
| Wireless battery charging | WPC | Qi | 
| Internal memory | 128 GB, 256 GB | 128 GB, 256 GB | 
| RAM memory | 6 GB, 8 GB | 8 GB | 
| Memory cards | ||
| Operating system | Android 12 | Android 11 | 
| Interface | One UI 4 | One UI 3.1 | 
| Processor | Qualcomm Snapdragon 888 SM8350 | Samsung Exynos 2100 | 
| Processor clock | 2840 MHz | 2900 MHz | 
| GPU | Adreno 660 | - | 
| Touchscreen | ||
| DualSIM | ||
| SIM cards standard | DualSIM(nanoSIM, nanoSIM) | DualSIM(nanoSIM, nanoSIM) | 
| DualSIM mode | dual standby | dual standby | 
| Hybrid DualSIM | ||
| Announced | 1Q 2022 | 1Q 2021 | 
| Other names | SM-G990B/DS; SM-G990E/DS; SM-G990U1/DS | SM-G991B | 
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 | 
| UMTS | 850 900 1700 1900 2100 | 850 900 1900 2100 | 
| LTE standard | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300, 1900 | |
| Standard 5G | FDD 5G: 1900, 1700, 850, 600 TDD 5G: 2500 | |
| CDMA | ||
| Standard TD-SCDMA | ||
| UMA | 
 
            

 
                