I have the iphone 5s and the iPad Mini with Retina Display both were updated with ios version prior to ios 8.
I did the v8 update on iphone and it wiped out my KB shortcuts, the list of 50 or so is bare. AND the carrier msg came up and asked me about updating it so I stupidly said yes, and it threw my ipad for a loop and it now has a no SIM msg, restating does nothing to help either condition. the ipad still has my kb shortcuts, so i did screen prints to save them, but afraid to update ipad until i know what other bad stuff happens, i did do backup of both devices, so i can undo the update if it comes to that.
I did the v8 update on iphone and it wiped out my KB shortcuts, the list of 50 or so is bare. AND the carrier msg came up and asked me about updating it so I stupidly said yes, and it threw my ipad for a loop and it now has a no SIM msg, restating does nothing to help either condition. the ipad still has my kb shortcuts, so i did screen prints to save them, but afraid to update ipad until i know what other bad stuff happens, i did do backup of both devices, so i can undo the update if it comes to that.