Activation error without backup

[Museo12]

Downloaded develops beta 9.0 ( beta3 ) earlier this summer. Today I received several notifications that there was a new beta for developers to download, which I knew before but have been lazy and have not updated or backed up. When I would check my email at lunch I did not come into the phone. It was activation error. I tried via ITunes, bit no luck. Couldnt back up either...
Is there a chance to solve this without restore the phone?

 

[K4LK]

Why would you not backup? Anyway, you are going to have to put it in DFU mode and restore using the latest downloaded beta (5) with iTunes. Once they expire, the phone is pretty useless. Sorry.

 

[batting1000]

Beta 3 expired yesterday. You'll have to go into DFU mode and click restore to return to 8.4.1 (or to beta 5 if you have the .ipsw for it).

Not sure why people are not updating their beta and then getting confused when it expires and doesn't work anymore. No point in running a beta if you're not gonna stay up to date.