Q: iphone 5 and iOS 8.1.2 crashing.

I recently Upgrade my iPhone 5 from iOS 8.1.1 to iOS 8.1.2.

Since that time my iPhone has been crashing randomly at times. (The screen suddenly gets black fuzzy lines over it then resets, or it just resets and takes me back to the lock screen or it just turns off) Also the battery indicator does not change unless the phone is turned off and back on so I never know what charge I am on.  The iOS 8.1.1 had been working fine with my phone and I did not have any issues which other people (Probably on later phones such as 5S,5C, 6 or 6 Plus.) had been experiencing with earlier version of iOS.8

Fortuantly I have kept my iPad mini on 8.1.1 and Will not do an upgrade as this is still stable and I can at least FaceTime and mail. with out risk of crashing.

Now. I know I was stupid and I had not done a recent back up before updating. This is not too much of an issue as had not done that many changes. However even when I did a restore it still said I was on 8.1.2.