I think it's optional but turned on by default; you can add a Google account to the phone but turn off syncing in the accounts and settings section of the phone so I'd assume that'd prevent GMail from using them too.
i ticked no but technically my contacts are synced to Google, I just don't use them for anything other than the phone. (there was a reason why but I forget what it was now, could've been something to do with getting contact's birthdays onto the calendar?)
no subject
Date: 2012-08-03 06:45 pm (UTC)If you do, it simply backs up your contacts automatically into your gmail contacts. It's not a phone app of any sort as such.
There are Android phones that do a separate phone sync as well, of course, that would do it via an app.
I like it because I can log into my gmail anywhere I have internet and all my contacts are there, it's awesome!
My "system"
Date: 2012-08-03 10:17 pm (UTC)Home addresses I have in a spreadsheet in google docs that I can open on my phone.
Email addresses are in gmail which I think autosynched with the phone but I only use the gmail client to send emails so I'm not 100% sure on that.
So basically google has all my data in some form or another that I can access via any device
no subject
Date: 2012-08-05 12:05 am (UTC)i ticked no but technically my contacts are synced to Google, I just don't use them for anything other than the phone. (there was a reason why but I forget what it was now, could've been something to do with getting contact's birthdays onto the calendar?)