Compared to my parent's iPhone 5, my iPhone 5 felt very sluggish switching between apps and even text messages. I upgraded to the iPhone 6 and it also felt sluggish. My parents phones are very snappy. I downloaded the "Battery Doctor" and it said that my memory is 83% full. I ran the "boost" and it went down to 30% and suddenly my phone felt very fast... although temporarily. After I ran it again a few minutes later, it was back at 83%. I restored my phone from iCloud backup initially but would be willing to set up the phone new if that would fix this problem... but I don't know how to make sure I save all of my contacts and get them back on the phone? Any other ideas as to why I am using so much memory? I have done the following: 1. Deleted all text messages 2. deleted camera roll 3. cleared cache 4. closed apps running in the background Thanks for the help!