iphone6 resolution for iphone5

gistfile1.txt

Download Cycript onto your Device.

If you have your computer handy, SSH into it by running "ssh root@192.168.2.3" or whatever your IP is and enter your password.
By default it is "alpine" without the quotations but you may have changed it. Once you've SSH'd in, run this

(Make sure to open the preferences app first)

cycript -p Preferences 

Then 

[PSMagnifyController commitMagnifyMode:[PSMagnifyMode magnifyModeWithSize:{width:750,height:1334} name:@"" localizedName:@"" isZoomed:1]]

You an change the dimensions in the above line to meet your needs, iPhone 6+ or 6

NOTE: NEITHER RESPRINGING NOR REBOOTING CHANGES YOUR RESOLUTION BACK. YOU'LL HAVE TO USE THE ABOVE METHOD TO SET IT BACK TO YOUR
      NATIVE RESOLUTION MANUALLY.