How can the tribes, who lives in jungle can get a massage of islam

There aren't any tribes left in any jungles anywhere that haven't been reached by religions from the rest of the world. You would have to join a missionary group to know where to find the ones that have stayed with their own religion. It helps if the group is involved with medicine or agriculture or clean water, or you may not be appreciated. They may never adopt any new religion.

There are few "tribes" that don't have some radio and news from the outside world. I guess a question is what is Islam doing to inform them of the message