Used instead of sync to pull local contacts.

ContactsCollection.js

getContacts: function(filter, cb) {
	var fields = ['name', 'emails'],
		options = new ContactFindOptions(),
		callback = cb || $.noop,
		self = this;

	options.filter = filter || '';
	options.multiple = true;

	this.reset();

	var onSuccess = function(contacts) {
		var self = this;

		_.each(contacts, function(contact) {
			var name = contact.name,
				email;

			if (contact.emails) {
				email = _.findWhere(contact.emails, {'type': 'work'}) || contact.emails[0];
			}

			self.add({
				firstName: name.givenName || '',
				lastName: name.familyName || '',
				email: email ? email.value : ''
			})
		});

		callback();
	};

	var onError = function(error) {
		console.log(error);
		callback();
	};

	navigator.contacts.find(fields, _.bind(onSuccess, this), _.bind(onError, this), options);
}