contact
There are no landlines, but cell phones work well, due to a few very imposing cell phone towers dotted around the island. Grameenphone, Robi, Banglalink, Citycell and Airtel are the service providers and well establish here.
There is no internet on the island, the nearest is in Cox's Bazaar. Otherwise there is internet modems which use the same signal of mobile companies with decent speed.
respect
The island has seen a massive increase in tourism mostly Bangladeshis over the last few years, and the fragile ecosystem on the island is not well equipped to handle it. Do what you can to encourage eco-friendly practices, and definitely don't litter the island. It's also a good idea to avoid eating fish at every meal on an island where overfishing is a major problem and sea life is rapidly vanishing.
If you come across sea turtles or their eggs, keep a reasonable distance and don't disturb these fascinating but fragile creatures.
Westerners should be alert to the modest lifestyle of the islanders, especially women. It is not a good idea to swim in public places in western bathing suits, and modest dress is appropriate for both women and men.