CAT S31 Dual SIM vs CAT S30
| Type | Touch | Touch | Touch | Flip |
| Waterproofness & dust-resistance | IP68 | IP68 | IP68 | IP68 |
| Dimensions | 146.00 x 74.42 x 12.60 mm | 141.90 x 72.74 x 13.25 mm | - | 120.00 x 61.00 x 24.80 mm |
| Weight | 200.00 g | 181.00 g | 180.00 g | |
| Display size | 4.70" | 4.50" | 5.50" | 2.80" |
| Display | Color / IPS TFT 16M colors 720 x 1280 px (4.70") 312 ppi | Color / IPS TFT 16M colors 480 x 854 px (4.50") 218 ppi | Color / IPS TFT 16M colors 720 x 1440 px (5.50") 293 ppi | Color / TFT 16M colors 480 x 640 px (2.80") 286 ppi |
| Display protection | Corning Gorilla Glass Buy screen protector
| Corning Gorilla Glass Buy screen protector
| Asahi Dragontrail Buy screen protector
| Corning Gorilla Glass Buy screen protector
|
| Additional display | Mono / LCD 128 x 128 px (1.44") | |||
| Protection of the secondary display | ||||
| Talk time (max.) | 2G: 1080 min. (18.0 h) | 2G: 1080 min. (18.0 h) | ||
| Stand-by (max.) | 2G: 936 h. (39.0 days) | 2G: 936 h. (39.0 days) | ||
| Standard battery | Li-Ion 4000 mAhBuy powerbank
| Li-Ion 3000 mAhBuy powerbank
| Li-Ion 4200 mAhBuy powerbank
| Li-Ion 2000 mAhBuy powerbank
|
| Quick battery charging | Fast Charging | |||
| Wireless battery charging | ||||
| Internal memory | 16 GB | 8 GB | 32 GB | 16 GB |
| RAM memory | 2 GB | 1 GB | 3 GB | 2 GB |
| Memory cards | microSD, microSDHC, microSDXC up to 128 GBBuy memory card | microSD, microSDHC, microSDXC up to 64 GBBuy memory card | microSD, microSDHC, microSDXC up to 128 GBBuy memory card | microSD, microSDHC, microSDXC up to 128 GBBuy memory card |
| Operating system | Android 7.0 Nougat | Android 5.1 Lollipop | Android 10 | Android 11 Go |
| Processor | Qualcomm Snapdragon 210 MSM8909 | Qualcomm Snapdragon 210 MSM8909 | MediaTek | Qualcomm 215 |
| Processor clock | 1300 MHz | 1100 MHz | 1800 MHz | 1300 MHz |
| GPU | Adreno 304 | Adreno 304 | - | Adreno 308 |
| Touchscreen | ||||
| SAR (10g) | 1,152 W/kg | |||
| DualSIM | ||||
| SIM cards standard | DualSIM(nanoSIM, nanoSIM) | SingleSIM(nanoSIM) | SingleSIM(nanoSIM) | SingleSIM(nanoSIM) |
| DualSIM mode | dual standby | nd | nd | nd |
| Announced | 3Q 2017 | 3Q 2015 | 1Q 2020 | 3Q 2021 |
| Other names | - | - | - | - |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 850 900 1700 1900 2100 | 850 900 1700 1900 2100 | 850 900 1700 1900 2100 | 850 900 1700 1900 2100 |
| LTE standard | FDD LTE: 2600, 2100, 1900, 1800, 900, 850, 800 | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 | FDD LTE: 2600, 2100, 1900, 1800, 1700, 850, 800, 700, 600 TDD LTE: 2600, 2500, 2300, 1900 |
| Standard 5G | ||||
| CDMA | ||||
| Standard TD-SCDMA | ||||
| UMA |



