Knowing that bitcoin can be earned for free, with just a internet conection its possible to help some people wich live at poor countries, as long their internet provider has stable acess and low cost as well.
People living in second world countries could earn themselves some coins through signature campaigns, or just by offering their services to the public. But that's different for people living in third world countries. These people mostly don't have enough money for food and stuff. And for that reason, it will be a costly thing to pay for an internet connection while they need that money to feed their family. So no, I don't think Bitcoin will be of much value for them in that aspect.
I think isn't hard to find a celphone with internet connection even in poor countries but I doubt this signature campaigns, faucets or whatever can improve their lifes. If was easy, poverty would not exist. We have to thank for have where to sleep.