I'm working on an enterprise application, which is similar to contacts, calendar. I would like to sync my calendar and contact even when my application is in background. I'm good to use private API's also, as I'm not going to submit to the app store. Note here is, i wanted to make this work without jailbreaking the device.
Aalready a similar question posted here I'm creating this new thread since the already posted one has a solution suggested for Jailbreaked device.