I checked the phone bill, why didn't I send a text message to Unicom card?

If you can't get a short message reply when you query the phone bill information by SMS, it doesn't rule out that too many people use it to cause system delay. It is suggested that you can wait patiently for the SMS reply, or check whether the SMS interception function is set, which prevents you from receiving SMS messages normally. It is suggested that you can log in to Unicom's online business hall and click "Call Charge Inquiry" > "Real-time Call Charge" or "Account Balance" to inquire about the usage of call charges or account balance. If you still can't solve the problem, it is recommended to contact the customer service of the place of origin for understanding, subject to the customer service inquiry of the place of origin.