gistfile1.txt

    $fax_fc = entity_create('field_collection_item', array('field_name' => 'field_fax'));
    $fax_fc->setHostEntity('commerce_customer_profile', $profile);
    $fax_fc_wrapper = entity_metadata_wrapper('field_collection_item', $fax_fc);
    $fax_fc_wrapper->field_telephone_country_code->set($account_details['faxCountryCode']);
    $fax_fc_wrapper->field_phone_fax_number->set($account_details['faxNumber']);
    $fax_fc_wrapper->field_extension_code->set($account_details['faxExtension']);
    $fax_fc_wrapper->save(true);


    $phone_fc = entity_create('field_collection_item', array('field_name' => 'field_phone'));
    $phone_fc->setHostEntity('commerce_customer_profile', $profile);
    $phone_fc_wrapper = entity_metadata_wrapper('field_collection_item', $phone_fc);
    $phone_fc_wrapper->field_telephone_country_code->set($account_details['phoneCountryCode']);
    $phone_fc_wrapper->field_phone_fax_number->set($account_details['phoneNumber']);
    $phone_fc_wrapper->field_extension_code->set($account_details['phoneExtension']);
    $phone_fc_wrapper->save(true);