EFM - Alta Case Armour with D3O Signal Plus - Slate Clear - Samsung S21 Ultra

EFM - Alta Case Armour with D3O Signal Plus - Slate Clear - Samsung S21 Ultra

General Description

Protect your Samsung Galaxy S21 Ultra 5G with the EFM Alta Case Armour with D3O Signal Plus in Slate Clear, combining advanced impact protection with technology designed specifically for 5G connectivity.

The Alta Case Armour incorporates D3O 5G Signal Plus throughout the inner case to help absorb and disperse impact energy while minimising interference with your smartphone’s 5G signal performance.

With up to 6 metres of drop protection, integrated antimicrobial technology and a slim clear-and-slate design, the EFM Alta provides serious everyday protection without unnecessarily covering the premium look of your Galaxy S21 Ultra.

Key Features

• Designed for Samsung Galaxy S21 Ultra 5G – Precision-fit for the compatible Samsung flagship smartphone.

• D3O Signal Plus Technology – Advanced impact-protection material optimised for 5G-enabled smartphones.

• Up to 6M Drop Protection – Drop tested from heights of up to approximately 6 metres.

• Military-Grade Impact Protection – Designed for demanding protection against accidental drops and knocks.

• 5G Signal Optimised – D3O Signal Plus is engineered to minimise interference with 5G connectivity.

• Reduced 5G Signal Loss – Designed to limit signal loss compared with conventional protective case materials.

• Antimicrobial Protection – Helps kill up to 99.99% of bacteria and inhibit further growth on the case surface.

• Slate Clear Design – Combines transparent styling with distinctive slate-coloured protective elements.

• Slim Protective Profile – Provides serious impact protection without excessive bulk.

• Protective Corner Coverage – Helps defend vulnerable corners against accidental impacts.

• Raised Screen Protection – Helps reduce direct contact between the display and flat surfaces.

• Camera Protection – Raised protective area helps shield the rear camera system from surface contact.

• Precision Cut-Outs – Maintains convenient access to cameras, speakers, charging connections and controls.

• Everyday Grip – Designed for comfortable and secure handling during regular use.

Technical Specifications

Specification	Details
Brand	EFM
Series	Alta Case Armour
Product Type	5G Protective Phone Case
Compatible Device	Samsung Galaxy S21 Ultra 5G
Protection Technology	D3O 5G Signal Plus
Case Style	Slim / Impact Resistant
Maximum Drop Protection	Up to 6 metres
Drop Protection	Military Grade
5G Optimisation	Yes
5G Signal Loss Reduction	Up to 37% vs Conventional Case Materials
Antimicrobial Protection	Up to 99.99% Bacteria Reduction
Protection Area	Back, Sides & Corners
Protection Against	Drops, Bumps, Scratches & Everyday Wear
Raised Screen Protection	Yes
Camera Protection	Raised Protective Edge
Camera Access	Precision Opening
Button & Port Access	Yes
Profile	Slim / Lightweight
Colour	Slate Clear / Clear & Slate Grey
Recommended Use	Everyday, 5G & High-Impact Smartphone Protection

Advanced D3O Protection for 5G

The EFM Alta Case Armour combines D3O impact protection with Signal Plus technology specifically engineered for modern 5G smartphones.

According to EFM product information, D3O Signal Plus can limit 5G signal loss by up to 37% compared with conventional case materials, helping maintain stronger connectivity while still providing high-level impact protection.

Up to 6M Drop Protection

The Alta Case Armour for the Galaxy S21 range is drop tested from heights of up to 6 metres, making it a strong option for users who want significantly more protection than a basic slim case.

Antimicrobial Protection

Integrated antimicrobial technology helps kill up to 99.99% of bacteria and inhibit further growth on the case surface during everyday use.

Compatibility Note

Designed specifically for the Samsung Galaxy S21 Ultra 5G. Please confirm your exact device model before purchasing, as the Galaxy S21 and Galaxy S21+ require different case sizes.