device verizon ellipsis 7

me and my brother both have the same tables we both get the 0.15 beta we both login with our xbox live accounts and we see some people live streaming mcpe 0.15 we ask if they can invite us they say yes so they invite my brother babyderpbaby then me THEREALWWEFAN24 my brother gets on just fine i try to join there is only 3 people online i try to join and it trys to locate the sever for like 2 min then says can not connect to sever. i have grate internet connection so i restart my device it still dont work can u guys fix it