I highly recommend you backup with iTunes first. I have run the beta for months and hadn't backed up in a while. iCloud was wiped last week and when I updated t

I highly recommend you backup with iTunes first. I have run the beta for months and hadn't backed up in a while. iCloud was wiped last week and when I updated to the GM I lost everything. My last backup was in July, so that's where I had to start from there.