méiyǒu yě bùyòng gāngà kěyǐ wèn méiyǒu zhōngguó shǒujī hào hái yǒu bié de yōuhuì ma

没有也不用尴尬，可以问：“没有中国手机号，还有别的优惠吗？

If you don't have one, don't be embarrassed, you can ask: 'If I don't have a Chinese phone number, are there any other discounts?'