Here's the way to sync contacts on your iPhone by using Ubuntu One.
STEP 1 : on your desktop
STEP 2: on your iPhone
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STEP 1 : on your desktop
- Sign-in to Ubuntu One.
- Click Contacs-->Edit phone syncing (beta)
- Used username and password for your Ubuntu One on iPhone.
STEP 2: on your iPhone
- Download Ubuntu One in App Store.
- Set your account using username and password that already you have.
- It's ready to sync.