iPhone 5s problems after upgrading to iOS 7.1

Hi

I had problems with my iphone on 7.0.6 ( the apps were crashing and mail didnt work) so i thought that if I upgrade it to 7.1 it will help but it didnt.

I restored my iphone and then it got stuck on the apple logo that loads the iphone after the restore.. its been a while and the iphone turned on but then when i tried to restore my backup the iphone crashed and i had a blue screen and it rebooted like every 10 seconds so i restored again in DFU but nothing seems to help it got stuck on the apple logo and like every hour or something it reebots and blue screen comes again.....

please help meeeeee 😐