Why didn't Unicom recharge the phone bill or send a text message, and there was no arrears and no charge?

Because the system is busy, there will be a delay in receiving SMS. It is suggested that you can log in to the homepage of Unicom's online business hall after recharging successfully, and click "phone bill inquiry" > "payment record" to inquire about the payment in the past six months. You can also consult the local manual customer service or business hall, which is subject to local policies.