1. Product Overview
The OUKITEL C37 is a modern smartphone designed for daily use, offering a balance of aesthetics and functionality. It features a slim profile, a large FHD+ display, robust performance, and advanced camera capabilities. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your device.

Figure 1.1: OUKITEL C37 Smartphone (Purple variant)
Key features include a 6.6-inch FHD+ 60Hz display, an Octa-core processor, 24GB RAM (6GB+Up to 18GB Extended), 256GB ROM (expandable up to 1TB), a 48MP main camera, a 32MP front camera, and a 5150mAh battery. It supports Dual SIM 4G connectivity, fingerprint unlock, Face ID, and precise navigation with GPS, Glonass, and Galileo.
2. Initial Setup
2.1. What's in the Box
- 1x OUKITEL C37 Smartphone
- 1x 18W Charger
- 1x Type-C Charger Cable
- 1x Transparent Protective Case
- 1x PE Protective Film
- 1x Card Needle
- 1x Guide/Manual
- 1x Support Card
2.2. SIM Card and MicroSD Card Installation
The OUKITEL C37 supports Dual SIM 4G and MicroSD card expansion up to 1TB. Use the provided card needle to open the SIM tray.
- Locate the SIM tray slot on the side of the device.
- Insert the card needle into the small hole next to the SIM tray and gently push until the tray ejects.
- Place your Nano SIM card(s) and/or MicroSD card into the designated slots on the tray. Ensure the gold contacts face downwards and the cards are correctly oriented.
- Carefully reinsert the SIM tray back into the device until it clicks into place.

Figure 2.1: Inserting SIM and MicroSD cards into the tray
2.3. Powering On/Off and Charging
- Power On: Press and hold the Power button (located on the right side) until the OUKITEL logo appears.
- Power Off: Press and hold the Power button, then select 'Power off' from the options that appear on the screen.
- Charging: Connect the provided Type-C charger cable to the phone's Type-C port and the other end to the 18W charger. Plug the charger into a power outlet. The battery indicator on the screen will show charging status.
3. Operating the Device
3.1. Display and Visual Experience
The OUKITEL C37 features a 6.6-inch FHD+ display with a 60Hz refresh rate, offering a resolution of 1080x2408. This provides a clear and vibrant visual experience for various applications, from browsing to multimedia consumption.

Figure 3.1: The OUKITEL C37's immersive 6.6-inch FHD+ display
3.2. Performance and Storage
Powered by an Octa-core 12nm processor, the C37 ensures smooth multitasking and efficient operation. With 24GB RAM (6GB physical + up to 18GB extended virtual RAM) and 256GB internal storage, you have ample space for applications, photos, and files. Storage can be further expanded up to 1TB using a MicroSD card.

Figure 3.2: Internal components highlighting the Octa-core processor and memory
3.3. Camera Features
The OUKITEL C37 is equipped with a versatile camera system:
- 48MP Main Camera: Captures detailed photos with an 80° field of view, supporting HDR, beauty, and panorama modes.
- 32MP Front Camera: Ideal for clear and vivid selfies with an 83° field of view.
- 2MP Macro Camera: Allows for detailed close-up shots with a 76° field of view.

Figure 3.3: Rear camera module with 48MP main sensor
3.4. Battery Life
The 5150mAh battery provides extended usage times for streaming, gaming, and communication. Typical usage scenarios include:
- Up to 792 hours of standby time.
- Up to 26 hours of music playback.
- Up to 9 hours of video playback.
- Up to 20 hours of calling.
- Up to 7 hours of gaming.

Figure 3.4: Internal view showing the 5150mAh battery
3.5. Security Features
The OUKITEL C37 offers secure and convenient access options:
- Fingerprint Unlock: A side-mounted fingerprint sensor allows for quick and secure access to your device.
- Face ID: Utilize facial recognition for an alternative secure unlock method.

Figure 3.5: Illustration of Fingerprint and Face Unlock features
3.6. Connectivity and Navigation
The device supports Dual SIM 4G for flexible network options. It includes a Type-C port for charging and audio. For navigation, the C37 integrates GPS, Glonass, and Galileo systems, ensuring accurate positioning and location tracking.

Figure 3.6: Navigation interface showing GPS, Glonass, and Galileo support
3.7. Operating System
The OUKITEL C37 runs on Android 13.0, providing a user-friendly interface, access to a wide range of applications via the Google Play Store, and various customization options.
Video 3.1: Overview of the OUKITEL C37 Smartphone's features and Android 13 interface.
4. Maintenance
4.1. Cleaning the Device
To keep your OUKITEL C37 in optimal condition, regularly clean its surfaces. Use a soft, lint-free cloth to wipe the screen and body. For stubborn smudges, slightly dampen the cloth with water or a screen-cleaning solution. Avoid using harsh chemicals or abrasive materials.
4.2. Software Updates
Regularly check for and install software updates to ensure your device has the latest features, security patches, and performance improvements. You can typically find update options in the 'Settings' menu under 'System' or 'About phone'.
4.3. Battery Care
To prolong the life of your 5150mAh battery:
- Avoid extreme temperatures (very hot or very cold).
- Do not let the battery completely drain frequently.
- Use the original OUKITEL charger and cable for optimal charging.
4.4. Screen Protection
The OUKITEL C37 features Corning Gorilla Glass 5 for enhanced durability and resistance to scratches and minor impacts. While robust, it is recommended to use the provided protective film and case for additional protection against drops and scratches.

Figure 4.1: Illustration of Corning Gorilla Glass 5 protection
5. Troubleshooting
This section addresses common issues you might encounter with your OUKITEL C37 Smartphone.
| Problem | Possible Cause | Solution |
|---|---|---|
| Device won't power on | Low battery; System crash | Charge the device for at least 30 minutes; Press and hold the Power button for 10-15 seconds to force restart. |
| Cannot connect to network | SIM card not inserted correctly; Network settings issue; Incompatible carrier | Reinsert SIM card; Check APN settings; Ensure compatibility with T-Mobile (US) or other GSM carriers (not CDMA). |
| Apps crashing or freezing | Insufficient RAM; App bug; Software issue | Close background apps; Clear app cache/data; Update app; Update system software. |
| Fingerprint/Face ID not working | Sensor dirty; Incorrect registration; Software glitch | Clean sensor; Re-register fingerprint/face; Restart device. |
5.1. Factory Reset
If persistent issues occur, a factory reset may be necessary. Warning: This will erase all data on your device. Back up important data before proceeding. Navigate to 'Settings' > 'System' > 'Reset options' > 'Erase all data (factory reset)'.
6. Technical Specifications
Below are the detailed specifications for the OUKITEL C37 Smartphone:
| Feature | Specification |
|---|---|
| Model Name | C37-Purple |
| Operating System | Android 13.0 |
| Display Size | 6.6 Inches |
| Resolution | 1080 x 2400 |
| Refresh Rate | 60 Hz |
| RAM | 24 GB (6GB + up to 18GB Extended) |
| Memory Storage Capacity | 256 GB (Expandable up to 1TB with MicroSD) |
| Processor | Octa-core 12nm (MediaTek MT8788) |
| Main Camera | 48 MP |
| Front Camera | 32 MP |
| Macro Camera | 2 MP |
| Battery Capacity | 5150 mAh |
| Charging Port | Type-C |
| Connectivity | 4G Dual SIM, Wi-Fi, Bluetooth, USB |
| Navigation | GPS, Glonass, Galileo |
| Security | Fingerprint, Face ID |
| Dimensions | 6.47 x 0.35 x 2.98 inches (164.3 x 75.5 x 8.8mm) |
| Weight | 7.1 ounces (200g) |
| Screen Protection | Corning Gorilla Glass 5 |
| Compatible Carriers (US) | T-Mobile (GSM carriers); Not compatible with CDMA carriers (e.g., AT&T, Cricket Wireless, Verizon, Straight Talk, U.S. Cellular) |
7. Warranty and Support
Your OUKITEL C37 Smartphone is covered by a manufacturer's warranty. Please refer to the 'Support Card' included in your product box for specific warranty terms and conditions. For technical support, product inquiries, or warranty claims, please contact OUKITEL customer service through the official channels or visit the OUKITEL store on Amazon.
OUKITEL Store: Visit the OUKITEL Store on Amazon


