Moto Z2 Play has protection against water. It comes with water repellent nano-coating.
Yes, Moto Z2 Play 64GB comes with latest 7.1 Android OS so you may not require to update it immediately but going forward, company will produce OTA updates.
Yes, the phone supports dual 4G sim cards.
Yes, it does have.
Yes, Moto Z2 Play is a dual sim mobile phone.