MaxCom MM821 vs MaxCom Smart MS459 Harmony
| Type | Clamshell | Touch |
| Dimensions | 98.50 x 48.00 x 18.00 mm | 138.00 x 69.00 x 11.00 mm |
| Weight | 180.00 g | |
| Display size | 2.00" | 4.50" |
| Display | Color / TFT (2.00") | Color / TFT 16M colors 480 x 854 px (4.50") 218 ppi |
| Display protection | ||
| Additional display | Color / OLED (1.00") | |
| Protection of the secondary display | ||
| Talk time (max.) | 2G: 180 min. (3.0 h) | |
| Stand-by (max.) | 2G: 120 h. (5.0 days) | |
| Standard battery | Li-Ion 2200 mAhBuy powerbank
| |
| Quick battery charging | ||
| Wireless battery charging | ||
| Phonebook memory | 200 places | |
| Internal memory | 16 GB | |
| RAM memory | 2 GB | |
| Memory cards | microSD, microSDHC | microSD, microSDHC up to 32 GBBuy memory card |
| Processor | - | MediaTek MT6737 |
| Processor clock | - | 1300 MHz |
| GPU | - | ARM Mali-T720 MP2 @650 MHz |
| Touchscreen | ||
| DualSIM | ||
| SIM cards standard | SingleSIM(microSIM) | |
| Announced | 1Q 2019 | |
| Other names | - | - |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 850 900 2100 | |
| LTE standard | FDD LTE: 2600, 2100, 1800, 800 | |
| CDMA | ||
| Standard TD-SCDMA | ||
| UMA |

