1. Introduction
This manual provides essential information for the safe and efficient use of your ASHATA S28 Ultra smartphone. Please read it carefully before using the device and keep it for future reference.
The S28 Ultra is a 5.72-inch unlocked smartphone running on Android 11.0, featuring an MT6580 octa-core CPU, 2GB RAM, 16GB ROM, and a 4800mAh battery. It supports dual SIM cards and offers a high-resolution display for an enhanced visual experience.
2. Safety Information
- Battery Safety: Do not disassemble, puncture, or modify the battery. Avoid exposure to extreme temperatures or direct sunlight.
- Charging: Use only manufacturer-approved chargers and cables. Unplug the charger when not in use.
- Water Resistance: This device is not water-resistant. Avoid exposure to liquids.
- Driving Safety: Do not use your phone while driving. Always prioritize road safety.
- Medical Devices: Maintain a safe distance between the phone and medical devices like pacemakers. Consult your physician and device manufacturer for specific guidelines.
- Disposal: Dispose of the device and battery responsibly according to local regulations.
3. Package Contents
Verify that all items are present in your product package:
- ASHATA S28 Ultra Smartphone
- Charging Adapter
- USB Cable
- Earphones
- Screen Protector (pre-applied or separate)
- Protective Case
- User Manual (this document)

Image: The ASHATA S28 Ultra smartphone displayed with its included accessories, which typically consist of a charging adapter, USB cable, earphones, a screen protector, and a protective case.
4. Product Overview
Familiarize yourself with the physical components of your S28 Ultra smartphone.

Image: Front and back view of the ASHATA S28 Ultra smartphone. The front shows the display with a lock screen, while the back features the camera module and "HD screen" branding.
- Front Camera: For selfies and video calls.
- Display: 5.72-inch TN screen with 1080 x 1920 pixel resolution.
- Volume Buttons: Adjust media and call volume.
- Power Button: Turn the device on/off, lock/unlock the screen.
- Rear Cameras: Main camera for high-quality photos and videos.
- Micro USB Port: For charging and data transfer.
- 3.5mm Headphone Jack: For connecting wired earphones.
- Speaker: For audio output.
- Microphone: For calls and voice recording.

Image: A close-up view of the bottom edge of the ASHATA S28 Ultra smartphone, showing the Micro USB charging port and the 3.5mm headphone jack.
5. Setup
5.1. Inserting SIM and Memory Cards
The S28 Ultra supports dual SIM cards and a memory card (up to 32GB expansion). Ensure the phone is powered off before inserting or removing cards.
- Locate the SIM card tray on the side of the device.
- Use the provided SIM ejector tool to open the tray.
- Place your Nano-SIM cards and/or MicroSD card into the designated slots on the tray, ensuring correct orientation.
- Carefully push the tray back into the phone until it is flush with the device body.
Note: This phone supports 2G GSM networks (850, 900, 1800, 1900 MHz) and 3G WCDMA networks (850, 2100 MHz). Please check compatibility with your network provider.
5.2. Initial Power On and Setup
- Press and hold the Power button until the screen lights up.
- Follow the on-screen prompts to select your language, connect to a Wi-Fi network, and set up your Google account.
- You can also set up screen lock methods such as PIN, pattern, password, or face unlock during this process.
6. Operating Your Smartphone
6.1. Basic Navigation
- Touch Screen: Tap to select, swipe to scroll, pinch to zoom.
- Home Screen: Your central hub for apps and widgets.
- Notification Panel: Swipe down from the top of the screen to access notifications and quick settings.
- App Drawer: Swipe up from the bottom of the screen to view all installed applications.
6.2. Making Calls and Sending Messages
- Calls: Open the "Phone" app, dial a number, and tap the call icon.
- Messages: Open the "Messages" app, tap the new message icon, enter the recipient and your message.
6.3. Camera Functions
The S28 Ultra features dual front and rear cameras for capturing photos and videos.

Image: The camera interface of the ASHATA S28 Ultra, displaying options for different photography modes such as SLO-MO, VIDEO, PHOTO, and PORTRAIT, indicating versatile camera capabilities.
- Open the "Camera" app.
- Select your desired mode (Photo, Video, Portrait, etc.).
- Tap the shutter button to take a photo or start/stop recording a video.
- Use the toggle to switch between front and rear cameras.
6.4. Internet and Connectivity
- Wi-Fi: Go to Settings > Network & internet > Wi-Fi to connect to available networks.
- Mobile Data: Ensure mobile data is enabled in Quick Settings or Settings > Network & internet > Mobile network.
- Bluetooth: Go to Settings > Connected devices > Bluetooth to pair with other devices.
- NFC: The device supports NFC for contactless payments and data exchange. Enable it in Settings > Connected devices > Connection preferences > NFC.
7. Maintenance
- Cleaning: Use a soft, lint-free cloth to clean the screen and body. Avoid harsh chemicals.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly and avoid leaving it connected to the charger for extended periods after it's fully charged.
- Software Updates: Regularly check for system updates in Settings > System > System update to ensure optimal performance and security.
- Storage Management: Periodically clear unnecessary files and apps to free up storage space. Go to Settings > Storage.
8. Troubleshooting
| Problem | Possible Solution |
|---|---|
| Phone does not turn on. | Ensure the battery is charged. Connect the charger and wait a few minutes before attempting to power on again. |
| Cannot connect to Wi-Fi. | Check if Wi-Fi is enabled. Restart your router and the phone. Ensure you have the correct Wi-Fi password. |
| SIM card not detected. | Power off the phone, re-insert the SIM card correctly, and power on again. Verify SIM card is active with your carrier. |
| Apps are slow or crashing. | Close background apps. Clear app cache (Settings > Apps > [App Name] > Storage > Clear cache). Restart the phone. |
| Battery drains quickly. | Reduce screen brightness. Disable unused features like GPS, Bluetooth, Wi-Fi. Close background apps. Check battery usage in Settings > Battery. |
9. Specifications
| Feature | Detail |
|---|---|
| Model Name | S28 Ultra (RichuYKfoROvLZ-11) |
| Brand | ASHATA |
| Operating System | Android 11.0 |
| Processor | MT6580 Octa Core CPU (up to 2.0 GHz, 12nm) |
| Display Size | 5.72 inches TN |
| Resolution | 1080 x 1920 pixels |
| RAM | 2GB |
| ROM (Internal Storage) | 16GB |
| Expandable Storage | MicroSD up to 32GB (not included) |
| Battery Capacity | 4800mAh |
| Cameras | Dual Front and Rear (5MP + 8MP) |
| SIM Support | Dual SIM, Dual Standby |
| Network Bands | 2G GSM: 850, 900, 1800, 1900 MHz; 3G WCDMA: 850, 2100 MHz |
| Connectivity | Wi-Fi, Bluetooth, FM, NFC |
| Interfaces | Micro USB, 3.5mm Headphone Jack |
| Security Features | Face Recognition |
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact the retailer/manufacturer directly. Keep your proof of purchase for warranty claims.
Manufacturer: ASHATA