NotebookCheck | Michael Moser

The CAT S40 is a rather rugged device with rough corners. High-end specifications and compact dimensions are non-existent. It cannot get rough enough for the smartphone, which is underlined by the IP68 and MIL-STD 810G certifications and the robust exterior.

pocketnow | Adam Doud

This phone is an absolute tank that can stand up to any torture you care to put it through. The rubberized/metal outer shell laughs in the face of danger. That is all great. But the performance hit from the insides make this phone hard to recommend. Even the price isn't that great compared to a similarly spec'ed phone and an Otterbox case.

Phone Scoop | Eric M. Zeman

The CAT S40 fulfills its mission: it's a rugged smartphone that handles bumps, bruises, and a bath, all while delivering a core Android smartphone experience.

Tom's Guide | Cherlynn Low

The sturdy Cat S40 is a waterproof and drop-proof Android phone, but its poor cameras and slow performance disappoint... The waterproof, durable Cat S40 is strong enough for harsh environments, but its poor cameras and slow performance hold this Android phone back.