Quad Lock® QMC-GS21U MAG Case for Galaxy S21 Ultra, Twist Lock and MAG Mounting

The problem it fixes

If you mount your Galaxy S21 Ultra for work or riding, the weak point is usually the holder, not the phone. Locking the phone to the mount through the case takes that guesswork out.

Why buy it

• Shaped for the Galaxy S21 Ultra
• Tough polycarbonate core with an impact absorbing TPU shell, edge to edge
• Built in MAG ring for Quad Lock MAG mounts and heads
• Twist lock interface for every standard Quad Lock mount
• Slim, soft touch finish with a protective lining
• Wireless charging friendly on phones that support it

Will it fit my setup?

• Galaxy S21 Ultra only
• Quad Lock twist lock mounts and heads
• Quad Lock MAG mounts and heads

Fitting it

Fit the case from one top corner and work round to the bottom. To mount, line it up with a Quad Lock head and twist a quarter turn, or hold it near a MAG head and the magnets do the rest.

What's in the box

• 1 x Quad Lock MAG Case for Galaxy S21 Ultra

What else you need

A Quad Lock mount. The Quad Lock Cup Holder Mount suits the car, and the full range of bike, motorcycle and desk mounts is in our Quad Lock collection.

Specifications

Delivery

Order today.

Warranty

1 year Quad Lock warranty against defects in materials and workmanship when bought from an authorised reseller like Frankies, on top of your Australian Consumer Law rights.

Questions we get asked

Will the QMC-GS21U fit the Galaxy S21?

No. This MAG case is shaped for the Galaxy S21 Ultra only. The Galaxy S21 has a different body and camera layout, so it needs QMC-GS21 instead.

How do I check my phone is a Galaxy S21 Ultra?

Go to Settings, About phone, and read the model name at the top. It has a 6.8 inch screen. It came out in 2021. If it shows Galaxy S21 Ultra, this is the right MAG case.

My Galaxy S21 Ultra has no MagSafe style magnets. Will MAG mounts still hold it?

Yes. The QMC-GS21U has its own magnets in the MAG ring on the back, so a MAG mount holds your Galaxy S21 Ultra through the case, not through the phone. It still twist locks onto every standard Quad Lock mount too.

Is there a matching screen protector for the Galaxy S21 Ultra?

Quad Lock does not list a screen protector for the Galaxy S21 Ultra at the moment.

How heavy is the QMC-GS21U?

Quad Lock lists the QMC-GS21U at about 67g, so it adds very little to your Galaxy S21 Ultra.

Will my Galaxy S21 Ultra still charge wirelessly in the QMC-GS21U?

Yes. The QMC-GS21U is made to work with wireless chargers, so your Galaxy S21 Ultra still charges through it, including on the Quad Lock wireless charging heads.