1. Product Overview
The Second Skin Heartful Blue (Clear) case, model MKY301-PCCL-201-Y158, is designed specifically for the S301/MVNO smartphone (SIM Free Device). This case provides protection for your smartphone from scratches and minor impacts, covering the back and sides of the device. It features a unique design with colorful hearts, applied using UV hardening ink and a top coat finish.

Figure 1: Second Skin Heartful Blue smartphone case. This image displays the rear view of the case, highlighting its distinctive heart pattern in various shades of blue and light blue. The case is designed to fit the S301/MVNO smartphone, with precise cutouts for the camera and speaker.
Key Features:
- Material: Durable polycarbonate body.
- Finish: UV curing ink with a protective top coat.
- Design: Flat printed design covering the back, with no printing on the sides.
- Compatibility: Exclusively designed for the S301/MVNO smartphone (SIM free device).
2. Setup and Installation
Installing your Second Skin smartphone case is a straightforward process. Ensure your smartphone is clean and free of dust or debris before installation to prevent scratches.
- Prepare Your Device: Gently wipe your S301/MVNO smartphone with a soft, lint-free cloth to remove any fingerprints or dust.
- Align the Case: Hold the case with the design facing outwards. Carefully align the camera cutout and speaker cutout on the case with those on your smartphone.
- Insert the Phone: Starting from one end (e.g., the top or bottom), gently push your smartphone into the case. Apply even pressure around the edges until the phone is fully seated and all corners are securely covered by the case.
- Verify Fit: Once installed, ensure the case fits snugly around your phone and that all ports, buttons, and the camera are accessible and unobstructed.
The case is designed for easy removal when needed.
3. Operating and Usage
The Second Skin case is designed to integrate seamlessly with your S301/MVNO smartphone, providing protection without hindering functionality.
- Protection: The case protects the back and sides of your smartphone from daily wear and tear, including scratches and minor bumps.
- Accessibility: All essential ports, buttons, and the camera lens remain accessible and fully functional with the case installed.
- Charging: Your phone can be charged with the case attached using a charging cable. Note: This case is not compatible with desktop-type chargers or charging docks that require the phone to sit directly on a base.
4. Maintenance
To ensure the longevity and appearance of your Second Skin smartphone case, follow these simple maintenance guidelines:
- Cleaning: To clean the case, gently wipe it with a soft, damp cloth. For stubborn marks, a small amount of mild soap can be used, followed by wiping with a clean, damp cloth.
- Avoid Harsh Chemicals: Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the polycarbonate material or the printed design.
- Storage: When not in use, store the case in a cool, dry place away from direct sunlight to prevent discoloration or material degradation.
- Handling: While durable, avoid excessive bending or twisting of the case, which could lead to damage.
5. Troubleshooting
Most issues with a smartphone case are minor. Here are some common concerns and their solutions:
- Case Does Not Fit:
Issue: The case does not seem to fit your smartphone correctly.
Solution: Verify that your smartphone is the S301/MVNO model (SIM Free Device). This case is designed exclusively for this specific model. Check the model number of your phone against the compatibility information provided in this manual.
- Charging Issues:
Issue: Phone is not charging when in the case.
Solution: Ensure you are using a charging cable. The case is not compatible with desktop-type chargers or docks. Check that the charging cable is fully inserted into the phone's port and that the port on the case is not obstructed by debris.
- Scratches on Phone After Case Use:
Issue: Small scratches appear on the phone's surface after using the case.
Solution: This can occur if dust or small particles get trapped between the phone and the case. Regularly remove the case and clean both your phone and the inside of the case with a soft, lint-free cloth to prevent particle buildup.
6. Specifications
| Attribute | Detail |
|---|---|
| Product Name | Second Skin Heartful Blue (Clear) Case |
| Model Number | MKY301-PCCL-201-Y158 |
| Compatible Device | S301/MVNO Smartphone (SIM Free Device) |
| Material | Polycarbonate |
| Processing | UV curing ink, top coat finish |
| Printing Range | Flat printed (no printing on the sides) |
| Product Dimensions (L x W x H) | 8.27 x 4.33 x 0.87 inches (21.0 x 11.0 x 2.2 cm) |
| Item Weight | 1.44 ounces (40.8 grams) |
| Manufacturer | SECOND SKIN |
| ASIN | B014KJB1W2 |
| Date First Available | October 17, 2015 |
7. Warranty and Support
This product is manufactured by SECOND SKIN. As a small business brand, Second Skin is committed to providing quality products. While specific warranty details are not provided in this manual, general support for product inquiries or issues can typically be directed to the retailer where the product was purchased or by visiting the official Second Skin brand store on Amazon.
For further assistance, please refer to the contact information provided by your point of purchase or search for "Second Skin" on Amazon to find their official store page for potential support options.
Note: All product processing is handmade and carried out in Japan by skilled artisans, ensuring attention to detail and quality craftsmanship.





