Philippines is a fun place, it also isn't as modern as it is here in the states, being unable to contact someone there isn't unusual, my family when I was there couldn't get ahold of me for awhile either. they had my phone number, and i was able to call and text them after awhile, but they weren't able to text or even call me for over a week after i had stayed at the same place. There are places in the Philippines where there just isn't any available tower to text or call exwhyzee, so don't know what to tell you. In Cebu, bohol and surrounding area there are many places where he can be diving and fishing. Just keep your hopes up, he may even have lost his cell phone.
Isn't it typical of jdubs to just care about themselves, sounds to me that if they were trapped by mud, that family trapped may have even been living on high ground, remember some of the mountain sides gave way and much mud etc came down and if this the case it may well have trapped them. the ones washed out to sea obviously lived very very close to the ocean. they may not have even been contacted by the elders or whomever was supposed to contact them. Their phone (cell probably) may have had thr battery needing charging and of course they weren't able to get the word if in fact it was ever passed.
Dubs live on tragedy, it is their preferred event for passing the word, and of course the rush to help would only be for witnesses. They should be ashamed of themselves. However others will notice this not helping any but their own and the dubs are giving a bad witness to them by their actions. It is just so damn typical.