Re: hard reset from 14295
I also had build 14295, but it had too many bugs that I couldn't use it - Store didn't work, my contacts did not sync and most essential apps would never open, including photos, mail and phone.
Soft reset didn't work, neither did the Hard Reset. I used the Windows Devices Recovery Tool and rolled back to Win8.1. and upgraded to 10586 (production ring).
Note: If you wish to upgrade back, do install all apps when you downgrade, because your data will not be saved when you re-upgrade to Windows 10. Windows 8.1 Phone overwrites your current Windows 10 Mobile backup on OneDrive, kinda weird thing... Be sure to back up your data at each build to be on safest side.