On: Google: 'Your $1000 phone needs our permission to install apps now' [video]

[tokai]

You use vCard.

https://www.punkt.ch/repofiles/14440-MP02%20backing%20up%20c...

[dotancohen → tokai]

With over 900 contacts?

Even just my personal CardDAV account has close to 200 contacts.

[tokai → dotancohen]

CardDAV is an extension of vCard. vCard can handle an arbitrary amount of contacts. But who knows, you definitely have more experience in using address book protocols than me.

[dotancohen → tokai]

I don't claim to know much. But with multiple contact lists and many groups in each list, CardDAV is a must.