Introduction
This user manual provides essential information for the proper use, setup, operation, and maintenance of your Crosscall Core-T4 Mobile/Tablet. Please read this manual thoroughly before using the device to ensure optimal performance and longevity.

Figure 1: Front view of the Crosscall Core-T4 Mobile/Tablet.
Device Overview
The Crosscall Core-T4 is a robust 8-inch mobile tablet designed for durability and extended use. It features a 5 MP front camera and a 13 MP rear camera, running on Android 9.0 Pie.
- Display: 8-inch screen
- Operating System: Android 9.0 Pie
- Cameras: 5 MP Front, 13 MP Rear
- Connectivity: 4G+, Wi-Fi, NFC, Bluetooth
- Storage: 3GB RAM, 32GB Internal (expandable up to 512GB via Micro SD)
- Battery: 7000 mAh for extended usage
- Durability: IP68 standard, waterproof and durable

Figure 2: Front and back view of the Crosscall Core-T4 Mobile/Tablet.
Setup
1. Inserting SIM and Micro SD Cards
The Core-T4 supports Dual SIM and a Micro SD card for expanded storage.
- Locate the SIM/Micro SD card tray on the side of the device.
- Use the provided tool to open the tray.
- Carefully place your Nano SIM cards and Micro SD card into their respective slots.
- Gently push the tray back into the device until it clicks into place.
2. Initial Charging
Before first use, fully charge the device.
- Connect the charging cable to the device's charging port.
- Connect the other end of the cable to a compatible power adapter and plug it into a wall outlet.
- The battery indicator on the screen will show charging progress.
3. Powering On and Initial Configuration
Press and hold the power button until the Crosscall logo appears. Follow the on-screen prompts to complete the initial setup, including language selection, Wi-Fi connection, and Google account setup.
Operating Instructions
Basic Navigation
- Touch Screen: Tap to select, swipe to scroll, pinch to zoom.
- Home Screen: Access apps, widgets, and notifications.
- Notifications: Swipe down from the top of the screen to view notifications and quick settings.
Camera Usage
The Core-T4 is equipped with a 13 MP rear camera and a 5 MP front camera.
- Open the Camera application.
- Select between photo or video mode.
- Tap the screen to focus, then press the shutter button to capture.
- Switch between front and rear cameras using the camera toggle icon.

Figure 3: Rear view of the Crosscall Core-T4 Mobile/Tablet, showing the camera.
Connectivity
- Wi-Fi: Go to Settings > Network & Internet > Wi-Fi to connect to available networks.
- Bluetooth: Go to Settings > Connected devices > Bluetooth to pair with other Bluetooth devices.
- NFC: Enable NFC in settings for contactless payments and data transfer.
- 4G+: Ensure your SIM card is active and mobile data is enabled in settings for cellular connectivity.
Maintenance
Cleaning the Device
Use a soft, lint-free cloth to clean the screen and body of the tablet. For stubborn marks, slightly dampen the cloth with water. Avoid using harsh chemicals or abrasive materials.
Battery Care
To maximize battery life, avoid extreme temperatures and do not let the battery fully discharge frequently. Use only approved chargers.
Software Updates
Regularly check for and install software updates to ensure your device has the latest features and security patches. Go to Settings > System > System update.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery; software crash. | Charge the device for at least 30 minutes. Perform a forced restart by holding the power button for 10-15 seconds. |
| Cannot connect to Wi-Fi. | Incorrect password; router issue; Wi-Fi disabled. | Verify Wi-Fi password. Restart your router. Ensure Wi-Fi is enabled in settings. |
| Apps are slow or crashing. | Too many apps running; low storage; outdated app. | Close background apps. Clear app cache. Update apps from the Play Store. Consider freeing up storage. |
| Battery drains quickly. | High screen brightness; background apps; poor signal. | Reduce screen brightness. Close unused apps. Check battery usage in settings to identify culprits. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | Core-T4 |
| Model Number | COT4.TAB.OPM |
| Brand | Crosscall |
| Display Size | 8 inches |
| Operating System | Android 9.0 Pie |
| Rear Camera | 13 MP |
| Front Camera | 5 MP |
| RAM | 3 GB |
| Internal Storage | 32 GB |
| Expandable Storage | Up to 512 GB (Micro SD) |
| Battery Capacity | 7000 mAh |
| Connectivity | 4G+, Wi-Fi, Bluetooth, NFC |
| SIM Support | Dual SIM (Nano SIM) |
| Dimensions (L x W x H) | 22.5 x 13.5 x 1.4 cm |
| Weight | 610 grams |
| Durability | IP68 Standard (Waterproof and Durable) |
Warranty and Support
The Crosscall Core-T4 Mobile/Tablet typically comes with a manufacturer's warranty. Please refer to the warranty card included with your product for specific terms and conditions, including warranty duration and coverage details.
For technical support, service, or further inquiries, please visit the official Crosscall website or contact their customer service department. Keep your proof of purchase for warranty claims.
Online Resources: For additional information, FAQs, and software downloads, please visit the official Crosscall support page.





