Is it necessary to rent an underwater camera to play on the island?

If I go to Semporna, I suggest renting an underwater camera. A treasure sledgehammer rents beautiful underwater, and the underwater camera rent is not expensive. For example, TG4 rented by Olympus, eight days in 200 yuan, and good underwater and land shooting. If you don't want to rent it, you also used a waterproof bag with your mobile phone when you went to Kota Kinabalu last year, and the effect will be worse.