The current iOS 14 beta (developer and public) versions are relatively stable - although it should be noted some apps will not work until they've been updated by their developers.
We've had increasing reports of mobile banking apps from Lloyd's Bank and Halifax especially reporting the device is jailbroken and can not be used for mobile banking.
You may also find battery life is degraded and your phone might crash and restart randomly as it runs in to software errors. Fortunately you can roll back to the previous version to get it back up and running properly.
It's important to note - if you've also updated your Apple Watch to Watch OS 7 you will not be able to downgrade it or use the watch with the previous iOS 13. The only way to have the software rolled back on these is to send in to Apple for a repair.
How to downgrade from iOS 14 on Mac
- Launch Finder on your Mac
- Connect your iPhone or iPad to your Mac with a Lightning Cable
- Put your device into recovery mode (methods vary by device, check out Apple Support Document here)
- A popup will ask if you want to restore your device, click Restore to wipe your device back to the latest public version of iOS
- Wait while the device finishes installing iOS
Once you've completed the above steps, you can set up as new or restore from your backup on Mac or iCloud (iOS 13 backup only)
How to enter recovery mode on your iOS device
- iPad Models with Face ID - Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Press and hold the Top button until your device begins to restart. Continue holding the Top button until your device goes into recovery mode.
- iPhone 8 or later - Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Then, press and hold the Side button until you see the recovery mode screen.
- iPhone 7, iPhone 7 Plus & iPod Touch 7th Gen - Press and hold the Top (or Side) and Volume Down buttons at the same time. Keep holding them until you see the recovery mode screen.
- iPad with Home Button, iPhone 6s or earlier & iPod touch 6th Gen (and earlier) - Press and hold both the Home and the Top (or Side) buttons at the same time. Keep holding them until you see the recovery mode screen.