PROBLEM FIXED (I think...)
Like all of you, I have been fighting this issue for about 4 days now. My phone has been draining the battery sometimes as much as 50% in one hour, networks unavailable, apps unresponsive and freezing (especially Music and Podcasts, as well as the settings for them), phone hot to the touch.
What I tried: Full restore to factory settings (at least 7 times), reset of network settings several times, turning off Apple Music, turning off iCloud music.
What I found: I determined that iCloud syncing of my music was pegging my processor (even AFTER I turned off iCloud sync), making it hard to get network connections, causing unresponsive and freezing apps, as well as killing my battery. I am subscribed to Apple Music and iCloud, and sync all of my music over the air to iCloud. When I first experienced the issues over the weekend, I restored my phone to factory settings, which also wiped my music. I realized my device has been attempting to load 40GB of music in the background and it was killing all other processes.
What I did:
- Plug my phone into my Mac & launch iTunes
- Backup device.
- Turn off iCloud music (this will remove all of your music from your device).
- Turn off Apple Music.
- Sync device
- Backup phone again
- I then selected only one album from my iTunes to sync to my phone (so that it doesn't try to push 40GB of music in the sync)
- Sync and backup again
- Press and hold the home button and power button until you see the plug on your phone (not the apple logo, it appear about 10 seconds after the apple logo appears); This will put your phone into restore mode.
- Follow prompts to restore your phone to factory settings
- Follow prompts to restore from latest backup
For now at least, my phone isn't hot, the battery is not draining, and all network and app functions have returned. I attempted parts of this before (turning off iCloud and syncing to my computer), but my phone kept trying to download music from iCloud even after syncing to my iTunes music. Clearly a bug. By going through all of the steps above, it finally killed that loop. I've since turned back on Apple Music (but not iCloud music) and it is still working fine. I will likely just sync my music to my computer instead of iCloud until an OS patch comes out just to be safe.