Metal mobile phone case

Buyers should prioritize Aluminum Alloy (6061 or 7075 grade) for its excellent strength-to-weight ratio or Stainless Steel for premium durability and corrosion resistance. Ensure the metal undergoes Anodic Oxidation (Anodizing) to provide a long-lasting color finish that resists scratches and fading. For high-end markets, look for Aviation-grade Titanium, which offers superior protection without significant weight increase.

A critical technical requirement is the inclusion of Signal Cut-outs or TPU/Plastic Inserts at antenna bands. Pure metal enclosures can block RF signals; therefore, professional suppliers must provide Signal Strength Test Reports to ensure the case does not interfere with 5G, Wi-Fi, or Bluetooth connectivity. Internal rubber padding is also essential to prevent the metal frame from scratching the phone's chassis and to provide shock absorption.

Modern sourcing should focus on MagSafe Compatibility, requiring integrated N52 neodymium magnets. Additionally, look for Heat Dissipation designs (such as hollow-out backplates or graphene thermal pads) which are highly valued by the gaming community. Raised Bezel Protection (at least 1.5mm for cameras and 1.2mm for screens) is a non-negotiable standard for drop protection compliance.

Products must comply with RoHS (Restriction of Hazardous Substances) to ensure no heavy metals like lead or cadmium are present in the alloys or coatings. For the EU market, REACH compliance is necessary. If the case includes magnetic components, it must meet UN38.3 or relevant magnetic safety standards for air freight.

Request CNC Precision Tolerance Reports from the supplier. High-quality metal cases should have a tolerance within ±0.05mm. Before bulk production, always order a Physical Prototype to test on the actual phone model, as 3D renders often fail to account for the tactile feedback of buttons and port accessibility.

Focus on Tiered Pricing based on MOQ and inquire about Tooling Costs. If you are requesting a custom design, clarify who owns the Intellectual Property (IP) of the molds. Professional suppliers on Made-in-China.com often offer 'Diamond Member' status or 'Audited Supplier' reports; prioritize these to ensure the factory has passed on-site inspections.

Metal cases are heavy and prone to surface friction damage during transit. Ensure the supplier uses Individual Anti-scratch PE Bags and Reinforced Corrugated Outer Cartons. For large volumes, Sea Freight (LCL/FCL) is more economical due to the weight, but ensure the use of Desiccants (Silica Gel) in the packaging to prevent oxidation or rust during long-term sea exposure.

Utilize Secured Payment services provided by Made-in-China.com to ensure funds are only released after the goods have been shipped and the Bill of Lading is provided. Always conduct a Pre-shipment Inspection (PSI) through a third-party agency to verify the quantity and quality match the Proforma Invoice before the final 70% balance payment.