Cat S61
#2994
HMD T21
#2089Category Breakdown
Cat S61
HMD T21
Performance
69.872.7
Camera
38.119.1
Display
58.947.7
Battery
30.638.8
Build
75.176.6
Connectivity
67.360.7
Audio
8.987.6
Overall
44.651.9
Summary
- The Cat S61 features a rugged build with Gorilla Glass 5 and an aluminum frame, weighing 250g, while the HMD T21 has a lighter design at 467g with an aluminum back and glass front.
- The S61's 5.2-inch display offers a higher pixel density at 424 ppi compared to the T21's 10.36-inch display at 225 ppi.
- In terms of performance, the S61 is powered by a Snapdragon 630 chipset, while the T21 uses a Unisoc Tiger T612, both with 64GB storage and 4GB RAM.
- The S61's rear camera is 16 MP with 4K video capability, whereas the T21 has an 8 MP rear camera limited to 1080p video.
- Battery capacity favors the T21 at 8200mAh versus the S61's 4500mAh, both supporting 18W charging.
- Lastly, the S61 runs on Android 8.0, upgradable to 9.0, while the T21 operates on the more recent Android 13, featuring stereo speakers.
Side-by-side Specification Comparison
Cat S61
HMD T21
General
Release Date
2018
2024, May 15
Announced
2018
2024, May 15
Description
N/A
N/A
Display
Size
5.2"
10.36"
Type
IPS LCD
IPS LCD, 360 nits (typ)
Resolution
1080 x 1920 pixels, 16:9 ratio (~424 ppi density)
1200 x 2000 pixels, 5:3 ratio (~225 ppi density)
PPI
1080
1200
Refresh Rate
60Hz
60Hz
HDR Support
✗
✗
Protection
Corning Gorilla Glass 5
Scratch-resistant glass
Performance
Chipset
Qualcomm SDM630 Snapdragon 630 (14 nm)
Unisoc Tiger T612 (12 nm)
CPU
Octa-core 2.2 GHz Cortex-A53
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
GPU
Adreno 508
Mali-G57
Memory
64GB 4GB RAM
64GB 4GB RAM, 128GB 4GB RAM
Expandable Storage
✗
✗
Card Slot
microSDXC (uses shared SIM slot)
microSDXC (dedicated slot)
Camera
Main Camera
16 MP, PDAF, FLIR thermal camera (Lepton module)
8 MP, AF
Main Camera Features
Thermal imaging, heat palettes, temp. spot meter, dual-LED dual-tone flash, panorama
LED flash
Front Camera
8 MP
8 MP
Front Camera Features
N/A
N/A
Video Recording
4K@30fps, 1080p@30fps
1080p@30fps
Selfie Video
1080p@30fps
Yes
Optical Stabilization
✗
✗
Night Mode
✗
✗
Raw Photo Support
✗
✗
Battery
Capacity
4500 mAh
8200 mAh
Battery Details
Li-Ion 4500 mAh, non-removable
Li-Po 8200 mAh
Charging Details
18W wired, QC4
18W wired, PD3.0
Fast Charging
✗
✗
Wireless Charging
✗
✗
Build & Safety
Dimensions
163 x 78 x 13 mm (6.42 x 3.07 x 0.51 in)
247.5 x 157.3 x 7.5 mm (9.74 x 6.19 x 0.30 in)
Weight
250 g
467 g
Materials
Glass front (Gorilla Glass 5), plastic back, aluminum frame
Glass front, aluminum back
Colors
Black
Black Steel
Foldable
✗
✗
SAR
N/A
N/A
Connectivity
SIM
Nano-SIM (South Africa only)Nano-SIM + Nano-SIM
Nano-SIM
Network
GSM / HSPA / LTE
GSM / HSPA / LTE
Network Speed
HSPA 42.2/5.76 Mbps, LTE (3CA) Cat12 600/150 Mbps
HSPA, LTE
5G
✗
✗
4G
✓
✓
WiFi
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
5.0, A2DP, LE
5.0, A2DP, LE
NFC
✓
✓
USB
USB Type-C 2.0, OTG
USB Type-C 2.0, OTG
IR Blaster
✗
✗
Headphone Jack
✓
✓
Radio
✗
✗
Positioning
GPS, GLONASS, GALILEO, QZSS, SBAS
GPS, GLONASS, GALILEO
Audio
Stereo Speakers
✗
✓
Loudspeaker
Yes
Yes, with stereo speakers
Audio Jack
Yes
Yes
Software & Security
Operating System
Android 8.0 (Oreo), upgradable to Android 9.0 (Pie)
Android 13
Fingerprint
✗
✗
Face Unlock
✗
✗
Sensors
Accelerometer, gyro, proximity, compass, barometer, indoor air quality sensor
Accelerometer, proximity (accessories only)