Demystifying Mobile Phone Backdoors and Frames: A Yezone Guide

In the intricate world of mobile phone repair and customization, understanding the anatomy of device casings is crucial. At Guangzhou Yezone, we specialize in mobile parts, and today we’re breaking down the different forms of backdoors and frames—key components that vary across phone models. Whether you’re a repair professional, a tech enthusiast, or simply curious, this guide will help you navigate these essential parts.

 Why Backdoors & Frames Matter

Mobile phone casings aren’t just about aesthetics—they impact:

• Device Protection: Shield internal components (batteries, cameras, circuitry) from damage.

• Repair Complexity: Different composition methods mean varied repair techniques.

• Customization Potential: Upgrading or replacing these parts can refresh a device’s look and functionality.

  
  

Common Casing Combinations

Phone manufacturers design casings differently based on model, cost, and functionality. Here are three typical structures we see at Yezone:

Structure 1: Simplified Layers

• Components:

• A: Front Frame (Holds the screen and provides front - side structural support).

• B: Back Door + Camera Lens Frame (Combined rear cover integrates the camera protection).

• Use Case: Common in budget or mid - range models (e.g., select Redmi devices). This design balances cost and ease of repair—swapping the back cover also safeguards the camera lens.

Structure 2: Modular Mid - Frame

• Components:

• A: Front Frame (Secures the display).

• B: Middle Frame + Camera Lens Frame (Central structure that houses internal parts + camera protection).

• C: Back Door (Simple rear cover for basic protection).

• Use Case: Found in devices prioritizing modular repairs (e.g., some Samsung A Series models). The middle frame streamlines internal component access, while the separate back door simplifies replacements.

Structure 3: Multi - Part Precision

• Components:

• A: Front Frame (Display anchor).

• B: Middle Frame (Core structural support).

• C: Back Door + Camera Lens Frame (Rear cover with integrated camera shielding).

• D: Back Door (Additional rear panel for dual - layer protection).

• Use Case: Typical in high - end or rugged devices (e.g., premium Xiaomi or Samsung models). This design offers robust protection but requires careful disassembly—ideal for users prioritizing durability.

Yezone’s Expertise in Casing Parts

At Guangzhou Yezone, we stock a wide range of backdoors, frames, and full casings for major brands (Samsung, Xiaomi, Infinix, etc.). Here’s why repair shops and DIYers trust us:

• Precision Compatibility: Parts are engineered to match original device specs—no ill - fitting components.

• Quality Assurance: Rigorous QC checks ensure durability, whether you’re replacing a back door or a full frame.

• Scarcity Solutions: We source hard - to - find casings, so you can repair even older or niche models.

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