4s ios9 beta5, crashes, sometimes helps to climb in the demo for 5 seconds or more, click on any items there, then comes in as usual and does not crash. Sometimes not the first time the truth is. something with their connection.
Try someone such a method, maybe it's just me so lucky.
Moreover, 3g and wifi behave the same way. Sometimes the latter comes without a demo.
I sin on ios9, who has 8 as well?