The way to make reading appealing to children and teenagers at refugee camps is to make sure they can read words easily. Those who struggle to read words do not like reading. Those who can read words easily like reading.
There is no need for mobile technology. What is needed is a teacher who understands the English alphabetic code and how to teach children or teenagers to decode letters to say sounds and to blend sounds to read simple and complex words. Success is more motivating than anything else.
On the same days but at different times, they can be told stories or someone can read stories to them that are culturally relevant and develop their critical sense. Until they find reading easy, it is better to listen and talk about stories and world events than to suggest reading about them.
I was a class teacher and now I specialise in the teaching of reading as a consultant and trainer. My website is http://www.teachtoread.com.