| Physical features | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Model | S61 (Single-sim) | Asha 503 (Dual-Sim) |
| Other model names | Caterpillar S61, CAT S61 Single-sim | Nokia Asha 503 RM-922, Nokia Asha 503 RM-958 |
| Country or region available | 
South Africa | feature not registered |
| Brand | CAT | Nokia |
| Release date | February, 2018 | November, 2013 |
| Depth | 13 millimeters (0.51 inches) | 12.7 millimeters (0.5 inches) |
| Size (width x height) | 76 x 150 millimeters (2.99 x 5.91 in) | 60.6 x 102.6 millimeters (2.39 x 4.04 in) |
| Weight | 163 grams (5.71 ounces) | 111 grams (3.89 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | Aluminum body, glass front, plastic back | feature not registered |
| Protection against water and others | IP68 certified: dust/water proof over 1.5 meters and 30min.
MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | Not supported |
| System (OS) | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Operating system | Android 8.0 Oreo | Nokia Series OS Asha Platform 1.1 |
| Firmware update | feature not registered | feature not registered |
| Hardware | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Chipset | 64bit - Qualcomm Snapdragon 630 SDM630 (14nm) | 32bit |
| CPU processor | Octa-Core, 2 processors:
2.2Ghz Quad-Core ARM Cortex-A53
1.8Ghz Quad-Core ARM Cortex-A53 | Single-Core |
| GPU graphical controller | Qualcomm Adreno 508 650Mhz | feature not registered |
| RAM memory | 4GB LPDDR4 | 128MB |
| Internal storage | 64GB (54GB available)
eMMC 5.1 | 5MB |
| External storage | Until 256GB microSD, microSDXC
(dedicated slot) | Until 32GB microSD, microSDHC
(dedicated slot) |
| Display | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Display type | TFT IPS LCD | TFT LCD |
| Screen size | 5.2" inches | 3" inches |
| Screen-to-body ratio | ~65.4% (screen-to-body ratio) | ~44.8% (screen-to-body ratio) |
| Display resolution | 1080x1920 pixels (16:9) | 240x320 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch 2-points |
| Pixel density (dot pitch) | 424 PPI | 133 PPI |
| Colors | 16 million | 260 thousand |
| Scratch-resistant glass | Gorilla Glass 5 | Gorilla Glass |
| Display features | 60Hz | feature not registered |
| Mobile networks | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Dual-SIM | Not supported | Dual-SIM Standby - Call active on one sim card
(dedicated slot) |
| SIM card | 1 slot (Single-SIM)
nano-SIM (4FF) | 2 slots (Dual-SIM)
micro-SIM (3FF) |
| Maximum download/upload | 600/150 Mbps | 7.2/5.76 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G |
| Frequency, bands | Expand band detailsCollapse details |
| GSM Mhz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 900/2100 |
| Primary 4G network | LTE Cat12 (1, 2, 3, 5, 7, 8, 19, 20, 26, 28)
TD-LTE (38, 39, 40, 41) | Not supported |
| Primary 5G network | Not supported | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA |
| Secondary 2G network | Not supported | GSM 850/900/1800/1900 |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | Not supported | GPRS, EDGE |
| Calling | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail |
| Speakerphone | Supported | Supported |
| Video calling | Supported | Not supported |
| Call control | Voice dialing, Voice recorder | Voice recorder |
| Camera | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Back camera (main camera) | 16 megapixels | 5 megapixels |
| Main camera resolution | 4608x3456 pixels | 2592x1944 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 30 fps | QVGA (320x240) 15 fps |
| Flash | Dual-LED flash | LED flash |
| Focal aperture | feature not registered | f/2.4 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | 1/4" inches |
| Pixel size | feature not registered | feature not registered |
| Autofocus | PDAF on back camera and autofocus front camera | Not supported |
| Touch focus | Supported | Not supported |
| Image stabilization | EIS: Digital stabilization | feature not registered |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Not supported |
| BSI sensor | Not supported | Not supported |
| HDR | HDR photo only main camera | Not supported |
| 2ª camera | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Front camera (secondary) | 8 megapixels | Not supported |
| Front camera resolution | 3264x2448 pixels | Not supported |
| Video recording (secondary) | Full HD (1920x1080) | Not supported |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Multimedia | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Radio | FM | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.263 |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, AAC |
| Connectivity | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| USB | USB 2.0 Type-C reversible connector | MicroUSB 2.0 |
| TV output | Not supported | Not supported |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 5.0 + A2DP/LE | 3.0 + A2DP |
| WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 b/g/n (2.4Ghz) |
| DLNA | Not supported | Not supported |
| NFC | Supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS | Not supported |
| Infrared port | Not supported | feature not registered |
| Other functions | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Active noise cancellation | Not supported | Not supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML |
| Sensors | Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Barometer
| Accelerometer
Proximity sensor
Ambient Light sensor
|
| Other features | - Colors: Black
- FLIR Thermal Imaging back camera
- WiFi direct, hotspot
- Drop-to-concrete resistance up to 1.8 meters | - Colors: Black, Blue, Yellow, White, Red, Green
- 4GB microSD included
- Nokia Life
- Support WhatsApp and eBuddy IM
- Java framework |
| Power supply | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| Battery | Li-Ion: Lithium-Ion (Non removable) | Li-Ion: Lithium-Ion (Removable)
BL-4U |
| Battery capacity | 4500 mAh | 1200 mAh |
| Charger, watts | 18W Fast battery charging
Quick Charge 4 | Standard charging |
| Talk time autonomy | 2100 minutes | 35 hours | 1.5 days | 270 minutes | 4.5 hours | 0.2 day |
| Standby | 53280 minutes | 888 hours | 37 days | 28800 minutes | 480 hours | 20 days |
| Radiation rate | CAT S61 (Single-sim) | Nokia Asha 503 (Dual-Sim) |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 1.43W/kg (head) | 0.64W/kg (body) |