IMDF-HUA3
Instruction Manual for Cubot J20 Phone Case with Tempered Glass Protector
Model: IMDF-HUA3
Introduction
This manual provides comprehensive instructions for the installation, use, and maintenance of your Cubot J20 Phone Case and Tempered Glass Screen Protector. This product is designed to offer robust protection and enhanced functionality for your Cubot J20 smartphone.
What's Included
Please verify that all items listed below are present in your package:
- 1 x Cubot J20 Phone Case (IMDF-HUA3)
- 1 x Tempered Glass Screen Protector

Image: Contents of the package including the phone case, detachable ring stand, and tempered glass screen protector.
Product Features
- Dual-Layer Protection: Constructed with a hard PC back panel and a soft silicone frame for comprehensive protection.
- Shock Airbags: Four-corner shock airbags are integrated into the design to absorb impacts and protect against drops.

Image: Close-up of the case highlighting the shockproof design and corner airbags.
- Integrated Ring Stand: Features an adhesive metal finger ring support that can be attached to the case or used separately. It offers 360-degree rotation for versatile viewing angles and magnetic suction compatibility for car mounts.

Image: Diagram showing the 180-degree and 360-degree rotation of the ring stand, and its compatibility with magnetic car mounts.
- IMD Laser Style Finish: The back features a multi-layered design including a solid PC base, ultra-high definition pattern layer, special process layer, and a clear, scratch-resistant surface layer, providing a frosted surface with a delicate feel and colorful reflective light effects.

Image: Exploded view illustrating the different layers of the IMD laser style back panel, including the clear scratch-resistant surface, laser layer, ultra HD print pattern layer, and PC rugged protective backplate.
- Enhanced Camera and Screen Protection: The case design is elevated around the camera and screen areas to provide additional flat surface protection.
- Tempered Glass Screen Protector: Included for additional screen protection, featuring 9H hardness, shatterproof properties, perfect adhesion, case-friendly design, 99.9% super transparency, and anti-fingerprint coating.

Image: Visual representation of the tempered glass screen protector highlighting its key features: 9H High Hardness, Perfect Adhesion, Shatterproof, Case Friendly, 99.9% Super Transparency, and Anti-fingerprint.

Image: Demonstration of the screen protector's scratch-proof capability, showing a hammer striking the protector without damage.
Setup and Installation
1. Installing the Tempered Glass Screen Protector
- Clean the Screen: Use an alcohol wipe (not included) to thoroughly clean your phone's screen. Ensure no dust, smudges, or fingerprints remain.
- Dry the Screen: Use a microfiber cloth (not included) to dry the screen completely.
- Remove Protective Film: Carefully peel off the protective film from the adhesive side of the tempered glass. Avoid touching the adhesive surface.
- Align and Apply: Align the screen protector with your phone's screen, ensuring the cutouts for the camera and sensors match. Gently lower the protector onto the screen.
- Smooth Bubbles: If any bubbles appear, gently push them towards the edges using a soft cloth or a credit card.
2. Installing the Phone Case
- Insert Phone: Gently insert your Cubot J20 phone into the soft silicone frame of the case, starting with one side.
- Secure Fit: Ensure all corners of the phone are securely seated within the case's frame. The hard PC back panel will provide a snug fit.
- Attach Ring Stand (Optional): If desired, peel off the adhesive backing from the metal finger ring and firmly press it onto the desired location on the back of the phone case. Allow a few minutes for the adhesive to set before use.
Operating Instructions
Using the Ring Stand
- Finger Grip: Slide your finger through the ring for a secure grip, reducing the risk of accidental drops.
- Kickstand Function: Rotate the ring to your desired angle and prop your phone up on a flat surface for hands-free viewing of videos or video calls.

Image: Illustration demonstrating improved one-hand operation and reach across the screen when using the finger ring.
- Magnetic Car Mount: The metal ring is compatible with magnetic car mounts (not included). Simply attach the case to a magnetic car mount for secure navigation or hands-free calling while driving.
Note: This case does not support wireless charging when the ring stand is attached or when using a magnetic car mount. Please remove the case or use a wired charger for wireless charging.
Maintenance and Care
- Cleaning the Case: Wipe the phone case with a soft, damp cloth to remove dust and smudges. Avoid using harsh chemicals or abrasive cleaners.
- Cleaning the Screen Protector: Use a microfiber cloth to gently wipe the screen protector. For stubborn smudges, a screen cleaner spray designed for electronics can be used.
- Avoid Extreme Temperatures: Do not expose the case or screen protector to extreme heat or cold, as this may affect their material integrity.
- Handle with Care: While durable, avoid unnecessary bending or forceful impacts to prolong the life of the product.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Bubbles under screen protector | Dust particles or improper application. | Gently lift the nearest edge of the protector and re-apply after ensuring the screen is clean. For small bubbles, try pushing them to the edge with a soft cloth. |
| Ring stand feels loose | Adhesive not fully set or re-positioned multiple times. | Ensure the adhesive has cured for at least 24 hours after initial application. If it continues to be loose, consider using a stronger adhesive or replacing the ring stand. |
| Phone not fitting correctly in case | Incorrect phone model or improper installation. | Verify your phone is a Cubot J20. Ensure all corners are properly seated within the silicone frame. |
Specifications
| Product Name | Case for Cubot J20 Phone with Tempered Glass Screen Protector |
| Model | IMDF-HUA3 |
| Compatible Phone Models | Cubot J20 |
| Material | PC hard back panel + soft silicone frame + metal support finger ring |
| Color | IMDF-HUA3 (Colorful Reflect Light) |
| Special Features | 360 Rotating Ring, Finger ring + support + car bracket magnetic suction, Car Magnetic Fixing, Shock Airbags |
| Item Weight | 2.46 ounces |
| Product Dimensions | 0.39 x 0.39 x 0.39 inches (Approximate, as per product data) |
Warranty and Support
This product is manufactured by Generic. For any issues or inquiries regarding your product, please refer to the retailer's return and support policies where you purchased this item. Typically, a standard return policy applies for manufacturing defects.
Please retain your proof of purchase for any warranty claims or support requests.
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