Just to clarify, the phone was on and submerged in near boiling water for 3 hours? If so, that's amazing. Most "waterproof" phones say in small print that they shouldn't even be used in the shower.
I'm due for a new phone anyway, which is why I chanced it, but this thing is tank-like. All the ports have aluminum-backed rubber flaps that seal when not in use and the speaker and mic close with little "5 meter" switches.
I've had it since 2016 and put it through some serious drops and stresses and it's held up really well. The one complaint was that the "carbon fiber" finish on the back started peeling off after about 6 months.