Hello,
I've been trying to update my iPhone 6 from iOS 9 beta 3 to beta 4 since yesterday but I always see the "your device is up to date" label. I've tried to restart multiple times and I also have tried to erase and reset my settings. Is there any workaround?
Thanks a lot.
Delete any profiles in Settings > General > Profiles. Restart your iPhone, and try again.
If you have an Apple Watch then you can reinstall the profile as you did before.
There's also a chance it was updated automatically.
You can check your version (13A4305g is Beta 4) in settings > general > about.
You can also see if your updates are set to occur automatically by looking here:
Settings > iTunes & App Store > Automatic Downloads > Updates.