Asus ZenFone Max M2 vs Samsung Galaxy S21 Ultra Dual SIM
| Type | Touch | Touch |
| Waterproofness & dust-resistance | IP68 | |
| Dimensions | 158.41 x 76.28 x 7.70 mm | 165.10 x 75.60 x 8.90 mm |
| Weight | 160.00 g | 227.00 g |
| Display size | 6.30" | 6.80" |
| Display | Color / IPS TFT 16M colors 720 x 1520 px (6.30") 267 ppi | Color / Dynamic AMOLED 16M colors 120 Hz 1440 x 3200 px (6.80") 516 ppi |
| Display protection | Corning Gorilla Glass Buy screen protector
| |
| Additional display | ||
| Protection of the secondary display | ||
| Standard battery | Li-Ion 4000 mAhBuy powerbank
| Li-Ion 5000 mAhBuy powerbank
|
| Quick battery charging | Fast Charging | |
| Wireless battery charging | Qi | |
| Internal memory | 64 GB, 32 GB | 128 GB, 256 GB, 512 GB |
| RAM memory | 4 GB, 3 GB | 12 GB, 16 GB |
| Memory cards | microSD, microSDHC, microSDXC | |
| Operating system | Android 8.1 Oreo | Android 11 |
| Interface | - | One UI 3.1 |
| Processor | Qualcomm Snapdragon 632 | Samsung Exynos 2100 |
| Processor clock | 1800 MHz | 2900 MHz |
| GPU | Adreno 506 | - |
| Touchscreen | ||
| DualSIM | ||
| SIM cards standard | DualSIM(nanoSIM, nanoSIM) | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | dual standby | dual standby |
| Hybrid DualSIM | ||
| Announced | 4Q 2018 | 1Q 2021 |
| Other names | ZB633KL | SM-G998B |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 850 900 1900 2100 | 850 900 1900 2100 |
| LTE standard | FDD LTE: 2600, 2100, 1900, 1800, 900, 850, 800 TDD LTE: 2300 | 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 |

