How to backup contacts and calendar from Apple iPhone 6s Plus

Whether you are switching phones or just want a safe copy of your data, PhoneCopy.com is a great solution. This guide covers how to back up contacts from your Apple iPhone 6s Plus quickly and easily.
Register
Run the app and create new account.
PERMISSIONS
Then you need to allow PhoneCopy access to your contact list and select contacts which will be synchronized
You can synchronize photos and videos too. Please note that the authorization of photos or videos is not required. If you will not grant it, PhoneCopy will only synchronize your contacts.
Let's synchronize!

With your contacts safely backed up, you can rest easy knowing your data is secure. Log into your PhoneCopy account at any time to view, edit, or restore your contacts.
Some additional tips:
It is a good idea to run a sync before any major change, such as a factory reset or an OS update. That way, your contacts are always protected before anything unexpected happens.