1. Introduction
This manual provides essential information for the safe and efficient use of your OEJBK I25 Ultra smartphone. Please read this manual thoroughly before operating your device to ensure optimal performance and longevity.
2. What's in the Box
Verify that all items are present in your product packaging:
- OEJBK I25 Ultra Smartphone
- Stylus
- Phone Case
- Charging Cable (USB-C)
- Quick Start Guide

Image: The OEJBK I25 Ultra smartphone in purple, shown with its accompanying stylus and a protective phone case.
3. Initial Setup
3.1. Inserting SIM Card and MicroSD Card
- Locate the SIM tray on the side of your device.
- Insert the SIM ejector tool (not included, typically found with your network provider's SIM card) into the small hole on the SIM tray.
- 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.
- Carefully reinsert the tray into the device.
3.2. Powering On/Off
- To power on: Press and hold the Power button (located on the side) until the OEJBK logo appears.
- To power off: Press and hold the Power button, then select 'Power off' from the options on the screen.
- To restart: Press and hold the Power button, then select 'Restart' from the options on the screen.
3.3. Initial Configuration
Follow the on-screen prompts to complete the initial setup, including:
- Language selection
- Wi-Fi network connection
- Google account sign-in
- Setting up screen lock (PIN, pattern, password)
- Configuring Face Unlock and Fingerprint Scanner (refer to Section 4.5)
4. Operating Your Smartphone
4.1. Display Features
The OEJBK I25 Ultra features a 6.99-inch AMOLED display with a 2400x1080 resolution and a 120Hz refresh rate, providing vibrant colors and smooth visuals.

Image: A close-up view of the smartphone's 6.99-inch perforated AMOLED screen, highlighting its edge-to-edge design.

Image: A hand holding the OEJBK I25 Ultra, showcasing a vibrant landscape on its 6.99-inch HD display, emphasizing visual quality.
4.2. Camera System
Capture high-quality photos and 8K videos with the dual-camera system:
- Rear Cameras: 68MP wide lens (f/1.8) and 108MP telephoto lens (5x optical zoom). Features include 8K video recording, AI portrait mode with bokeh control, and Sony IMX890 sensor technology.
- Front Camera: Details not specified in provided data, but supports AI portrait mode.

Image: A detailed view of the OEJBK I25 Ultra's dual rear camera system, emphasizing the 68MP wide lens and 108MP telephoto lens.
4.3. Performance
The smartphone is powered by a Snapdragon 8 Gen3 12-core processor with 8GB RAM and 256GB of internal storage, ensuring smooth multitasking and efficient app performance. Some variants may offer 512GB storage.

Image: An illustration depicting the Snapdragon 8 Gen3 12-core processor, representing the smartphone's powerful internal components.
4.4. Battery Life
Equipped with a 7000mAh battery, the OEJBK I25 Ultra provides over 48 hours of normal use. AI power management optimizes consumption based on usage patterns.

Image: The OEJBK I25 Ultra smartphone, with a visual emphasis on its substantial 7000mAh battery capacity.
4.5. Security Features
The device offers dual biometric security options:
- Face Unlock: Unlock your phone in 0.2 seconds using advanced facial recognition technology.
- Fingerprint Scanner: An under-display optical fingerprint scanner provides quick and secure access.

Image: A person is shown using the face recognition feature to unlock the OEJBK I25 Ultra smartphone.
4.6. Stylus Functionality
The included stylus enhances interaction with your device, allowing for precise input, note-taking, drawing, and navigation.
Video: A demonstration of the I25 Ultra phone, showcasing its design and features, including stylus interaction.
5. Maintenance
5.1. Care and Handling
- Keep your device dry. Moisture can damage electronic components.
- Avoid extreme temperatures. High or low temperatures can shorten the life of electronic devices.
- Do not drop, knock, or shake the device. Rough handling can break internal circuit boards and fine mechanics.
- Clean the screen with a soft, lint-free cloth. Avoid harsh chemicals.
- The device features IP68 waterproofing, offering protection against dust and water immersion up to 1.5 meters for 30 minutes. However, prolonged exposure or use in extreme conditions is not recommended.
5.2. Software Updates
Your OEJBK I25 Ultra runs on Android 14 OS and receives regular security updates to ensure long-term reliability and enhanced features. Check for updates periodically in your device settings.
6. Troubleshooting
If you encounter issues with your device, try the following common solutions:
- Device unresponsive: Press and hold the Power button for 10-15 seconds to force restart.
- Battery draining quickly: Check background app usage, reduce screen brightness, or enable power-saving mode.
- Network connectivity issues: Toggle Airplane Mode on/off, restart the device, or check your SIM card.
- Apps crashing: Clear the app's cache and data in Settings, or uninstall and reinstall the app.
- Slow performance: Close unused apps, clear storage space, or restart the device.
If problems persist, contact customer support for further assistance.
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | I25 |
| Brand | OEJBK |
| Operating System | Android 14 |
| CPU Model | Snapdragon 8 Gen3 (12-core) |
| CPU Speed | 3.4 GHz |
| RAM | 8 GB |
| Internal Storage | 256 GB (some variants 512 GB) |
| Screen Size | 6.99 Inches |
| Display Resolution | 2400 x 1080 (AMOLED, 120Hz) |
| Rear Camera | 68MP Wide + 108MP Telephoto |
| Battery Capacity | 7000 mAh |
| Connectivity | 5G/4G, GPS, Wireless |
| Audio Jack | 3.5 mm |
| Waterproofing | IP68 |
| Item Weight | 4 pounds |
8. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or visit the official OEJBK website. Keep your proof of purchase for warranty claims.