Only devices with an IP68 rating (waterproofing and dirt resistance) and MIL-STD-810G rating (durability) are considered tough and rugged.
Phones with an IP68 rating can withstand dust, dirt and sand, and be submerged in deep water. Standard testing doesn't provide a universal depth, but manufacturers normally provide details for each device.
MIL-STD-810G is military-specification which guarantees a very high level of durability. Any device with this rating has been put through its paces to prove its robustness - including seeing how the phone performs when faced with shock, vibrations, heat, cold and humidity.
If you're looking for a rugged phone for company use like the Samsung Galaxy XCover 5, we may have more rugged phones available on our business site or you can chat to one of our business sales representatives by visiting our business plans page.