Redmi 9AT vs Realme C21Y
| Type | Touch | Touch | Touch | Touch |
| Dimensions | 164.90 x 77.07 x 9.00 mm | 164.50 x 76.00 x 9.10 mm | 155.40 x 73.50 x 9.50 mm | - |
| Weight | 196.00 g | 194.00 g | 156.00 g | |
| Display size | 6.53" | 6.50" | 6.09" | 6.60" |
| Display | Color / IPS TFT 16M colors 720 x 1600 px (6.53") 263 ppi | Color / IPS TFT 16M colors 60 Hz 720 x 1600 px (6.50") 270 ppi | Color / IPS TFT 16M colors 720 x 1560 px (6.09") 282 ppi | Color / IPS TFT 16M colors 60 Hz 720 x 1612 px (6.60") 267 ppi |
| Display protection | Corning Gorilla Glass Buy screen protector
| |||
| Additional display | ||||
| Protection of the secondary display | ||||
| Talk time (max.) | 2G: 2280 min. (38.0 h) | |||
| Stand-by (max.) | 4G: 816 h. (34.0 days) | |||
| Playback time (max.) | Audio: 168 h (7.0 days) Video: 19 h (0.8 days) | nd | nd | nd |
| Standard battery | Li-Ion 5000 mAhBuy powerbank
| Li-Po 5000 mAhBuy powerbank
| Li-Ion 3380 mAhBuy powerbank
| Li-Ion 5000 mAhBuy powerbank
|
| Quick battery charging | ||||
| Wireless battery charging | ||||
| Internal memory | 32 GB | 32 GB, 64 GB | 32 GB | 64 GB |
| End-user memory | 44 GB | |||
| RAM memory | 2 GB, 3 GB | 3 GB, 4 GB | 2 GB | 2 GB, 4 GB |
| Memory cards | microSD, microSDHC, microSDXC up to 512 GBBuy memory card | microSD, microSDHC, microSDXC up to 256 GBBuy memory card | microSD, microSDHC, microSDXC up to 128 GBBuy memory card | microSD, microSDHC, microSDXC up to 256 GBBuy memory card |
| Operating system | Android | Android 11 | Android 11 Go | Android 13 |
| Interface | - | realme UI | - | MyOS 13 |
| Processor | MediaTek Helio G25 MT6762V | Unisoc Tiger T610 UMS512 | Unisoc SC9863A | Unisoc SC9863A |
| Processor clock | 2000 MHz | 1800 MHz | 1600 MHz | 1600 MHz |
| GPU | PowerVR GE8320 @650 MHz | ARM Mali G52 MP2 @614 MHz | IMG8322 @550 MHz | IMG8322 @550 MHz |
| Touchscreen | ||||
| DualSIM | ||||
| SIM cards standard | DualSIM(nanoSIM, nanoSIM) | DualSIM(nanoSIM, nanoSIM) | DualSIM(nanoSIM, nanoSIM) | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | dual standby | dual standby | dual standby | dual standby |
| Hybrid DualSIM | ||||
| Announced | 3Q 2020 | 2Q 2021 | 4Q 2023 | |
| Other names | M2006C3LVG; Dandelion; Xiaomi Redmi 9AT | RMX3261; RMX3263 | - | - |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 850 900 1700 1900 | 850 900 2100 | 900 2100 | 850 900 2100 |
| LTE standard | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300 | FDD LTE: 2600, 2100, 1800, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300 | FDD LTE: 2600, 2100, 1800, 900, 800 TDD LTE: 2300 | FDD LTE: 2700, 2100, 1800, 900, 850, 700 TDD LTE: 2300 |
| Standard 5G | ||||
| CDMA | ||||
| Standard TD-SCDMA | ||||
| UMA |



