At the moment only a select group of Minecraft PE players are using realms, this is according to Mojang - http://help.mojang.com/customer/portal/articles/1018151
Minecraft Realms for Minecraft: Pocket Edition, will be available through an in-app purchase, though further details have not yet been announced, this means that, for the moment we will just need to wait. According to mojang the cost of servers will be $10 to $15/month. At the moment minecraft realms are still being developed.
I have found a really good video telling you about realms…
If the video embed did not work, you can watch the video on this link: http://www.youtube.com/watch?v=4rBK4slpTis
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