Installation Guide for iPhone Duo DuoGuand Hinge Cover Case

 

THE HOOD / INSTALLATION GUIDE

iPhone Duo DuoGuard Hinge Cover Case / Screen Protector
Installation Guide

VIDEO TUTORIAL 01

Tempered Glass
Screen Protector Installation

BEFORE INSTALLATION

STEP 01

Choose the Right Screen Protector

THE HOOD DuoGuard features a front frame and hinge protection structure. The front frame must align correctly with the edges of your phone. Full-coverage, oversized, or thick screen protectors may interfere with the front frame, preventing the case from locking securely.

For the best installation, we recommend using a case-friendly screen protector with adequate edge clearance.

Recommended iPhone Duo case-friendly screen protector dimensions: 77.14 mm wide and 112.34 mm high

Recommended Size: 77.14 × 112.34 mm

Case-Friendly vs. Full Coverage

Correct compact-sized tempered glass compared with an incompatible oversized full-coverage screen protector

✓ Compatible with Compact-Sized
Screen Protectors

× Not compatible with full-screen
or 3D heat-bent screen protectors

STEP 02

Centre Your Screen Protector

IncorrectShifted Left

IncorrectShifted Right

CorrectProperly Centred

Three screen protector alignment examples: shifted left, shifted right, and correctly centred

*An incorrectly positioned screen protector may interfere with the case frame.

VIDEO TUTORIAL 02

Phone Case Installation Guide

CASE INSTALLATION

STEP 03

Align Before Installation

Before installing the case, make sure all components are correctly aligned with your phone.

THE HOOD DuoGuard features a front frame and hinge protection structure. During installation, ensure all components are in their correct positions.

Keep your phone and the case firmly pressed together on the right side.

How to align and secure the iPhone Duo DuoGuard phone case on the right side

*Do not force the case into place if the components are not properly aligned.

STEP 04

Check the Front Frame

Incorrectly secured DuoGuard front frame and the importance of a flush fit

*Pay particular attention to the bottom-left corner of the front frame.

If the front frame is not fully secured,
you may notice the following:

  • Visible gap between the front frame and your phone.
  • Part of the front frame not sitting flush against the phone.
  • Abnormal friction when opening or closing the phone.
  • Clicking or popping sounds during opening and closing.
  • Resistance or stiffness when folding or unfolding the phone.

OPENING & CLOSING TEST

STEP 05

Test the Hinge Movement

After installation, slowly open and close your phone to confirm that the case and hinge protection structure are working properly.

Checklist:

  • Slowly open your phone.
  • Confirm the hinge protection structure moves freely.
  • Slowly close your phone.
  • Watch for noticeable friction, stiffness, or unusual sounds.
  • If you notice any issues, recheck whether the front frame is fully secured.

When opening or closing your phone,
do not press hard on the case's hinge.

Do not press hard on the hinge protection when opening or closing the iPhone Duo case

Why Does the Case Make a Clicking Sound?

If the front frame of the case is not fully installed, it may interfere with the hinge protection structure, causing noticeable clicking or popping sounds when opening or closing the phone.

Based on THE HOOD's actual installation tests, these sounds are significantly reduced once the front frame is properly secured.

Smooth Opening. Secure Fit.

Step-by-step illustration showing the properly secured front frame and hinge movement

*If you experience unusual resistance when opening or closing your device, stop and check the installation before continuing.

TROUBLESHOOTING

ISSUE 01

Case Does Not Fit Properly

Possible causes:

  • Using a full-coverage screen protector.
  • Screen protector is oversized.
  • Screen protector is too thick.
  • Screen protector is not properly centred.
  • Front frame is not correctly aligned.

Suggested solution:

Check the screen protector's size and position, then reinstall the case following the installation guide.

ISSUE 02

Visible Gap Around the Front Frame

Possible causes:

The front frame is not fully secured, or the screen protector is interfering with the front frame.

Suggested solution:

Recheck all around the front frame — especially the bottom-left corner — and make sure every edge is fully secured.

ISSUE 03

Clicking or Popping Sound

Possible causes:

The front frame is not fully secured, causing part of it to interfere with the hinge protection structure.

Suggested solution:

Check for any visible gaps along the front frame, re-secure it following the installation video, then test the opening and closing again.

ISSUE 04

Difficulty Opening or Closing

Possible causes:

The case is not aligned correctly, or part of the structure is obstructed.

Suggested solution:

Stop forcing the phone open or closed. Recheck the installation position. If the issue persists, please contact THE HOOD customer service team.

NEED MORE HELP?

If the case still does not fit properly after reinstalling following the steps above, or if noticeable sounds persist when opening and closing, please contact THE HOOD customer service team.

To help us understand the issue faster, we recommend providing:

  • A front-facing photo of the case after installation.
  • Close-up photos of the bottom-left corner of the front frame and any other areas that don't fit flush.
  • A short video showing the phone being opened and closed.

THE HOOD Customer Support

enquiry@thehoodproduction.com