Lanhiem CXFM-I18S Waterproof Magnetic Case for iPhone 18 Pro Max

The Lanhiem CXFM-I18S is listed as a waterproof magnetic case for iPhone 18 Pro Max, with a built-in screen protector and camera cover. Its full-body design targets buyers who want covered screens and lenses as well as claimed water and dust protection, but the listing gives no independent test evidence.

At a glance

Listing describes a built-in screen protector and rear camera cover as part of its full-body design.
Manufacturer claims an integrated magnetic ring compatible with MagSafe accessories and wireless charging.
Waterproof and dustproof protection is claimed, with submersion stated up to 6.6 feet for 60 minutes, subject to following the instructions and testing before use.
Textured, angled stripes are described as a grip feature.
A two-year warranty is listed.

Price

£21.84Save 16%

Reference price: ~~£25.99~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Built-in screen and camera protection means buyers need not rely on separate case openings for those surfaces.
Magnetic compatibility is claimed for MagSafe accessories and wireless charging.
The case is promoted for full-body coverage, including water and dust protection.

Cons

A full-body shell with an integrated screen protector may not suit buyers who prefer an uncovered screen or a slimmer case.

Technical specifications

10 specifications

Identity
Brand	Lanhiem
Model	CXFM-I18S

Display and fit
Screen size	6.9 Inches
Dimensions listed	18 x 9 x 1 centimetres

Materials and protection
Water resistance listed	Waterproof
Material listed	Plastic

Design and compatibility
Compatible device	iPhone 18 Pro Max
Colour	Black
Pattern	Striped
Finish	Matte

What to know before buying

The manufacturer says to conduct a waterproof test according to the instructions before use. The stated submersion limit is a manufacturer claim, not an independently verified result.
The listing claims compatibility with iPhone 18 Pro Max, but customer feedback supplied for this listing refers to a Samsung S9+ and reports mixed fit and touchscreen experiences. Confirm the exact phone fit and treat that feedback as not clearly attributable to this model.

What’s in the box

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Who is it for?

A good fit for

iPhone 18 Pro Max owners seeking a case with screen and camera covers built in.
Buyers who want magnetic accessory compatibility and a grippy, full-body case.
People considering a water- and dust-protection case who are willing to follow its pre-use test instructions.

Less suited to

Buyers seeking a slim case or an uncovered screen.
Anyone needing independently confirmed waterproof performance or verified fit information before purchase.

Lanhiem CXFM-I18S Waterproof Magnetic Case for iPhone 18 Pro Max · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 3,636 ratings

5 stars64%64%
4 stars14%14%
3 stars8%8%
2 stars4%4%
1 star10%10%

Customer feedback supplied with this listing describes positive impressions of quality, durability and protection, including a report of surviving repeated water immersion. Fit, touchscreen sensitivity and ease of use are mixed. However, the supplied comments refer to a Samsung S9+, not the listed iPhone 18 Pro Max case, so they cannot establish how this model fits or performs. The aggregate ratings are favourable overall but include a notable low-star share, and do not explain the reasons behind ratings.

Positive themes

Feedback describes quality and durability positively.
Some supplied feedback praises protection and functionality.

Mixed feedback

Fit, touchscreen sensitivity and ease of use receive mixed feedback in the supplied comments, but those comments concern a Samsung S9+ rather than the listed iPhone case.

Frequently asked questions

Which phone is this case listed for?

The listing identifies the compatible device as iPhone 18 Pro Max. It also contains a broad “for iPhone” entry, so confirm your exact model before ordering.

What water protection does the listing claim?

The manufacturer claims IP68 protection and submersion up to 6.6 feet for 60 minutes. It instructs buyers to perform a waterproof test according to the instructions before use. These are listing claims, not independently verified results.

Does the case include screen and camera protection?

The feature description claims a built-in front screen protector and rear camera cover.

Is it compatible with MagSafe?

The listing claims an integrated magnetic ring compatible with MagSafe accessories and wireless charging.