I jailbroke my iphone 5 and quickly had problems with apps crashing, both Cydia and native apps. I installed an app to monitor my memory being used and noticed that even after I force quit apps, most of my memory was still being used. I eventually had to make the habit of hard resetting my phone, which became very annoying. The memory app told me that many cydia processes were still running and using a lot of memory. I decided to get rid of the jailbreak and restored to a backup, but unfortunately that backup was after the jailbreak...so, many of the jailbreak remnants (processes) were transferred over. Which I found out is one way Apple can tell if you have ever jailbroke your device. Now I have the same memory issue and apps crash (usually after letting me know that memory is low and that the app may crash). I know I can restore to factory settings and set the phone up as a new device - and not restore to a previous backup...BUT I want to keep contacts and calendar entries. Is this possible?