/**
 * Change default country on Caldera forms
 */
add_filter( 'caldera_forms_phone_js_options', function( $options){
    //Use ISO_3166-1_alpha-2 formatted country code
    $options[ 'initialCountry' ] = 'ZA';
    $options[ 'preferredCountries' ] = array( 'ZA', 'SWZ', 'LSO' );
    return $options;
});