Unicom's Hunan card didn't send a text message to remind you when Zhejiang's traffic ran out, but sent a text message to remind you one and a half hours later.

At present, due to the pricing problem of billing system, Unicom can only send traffic reminder messages after generating traffic bills. In the process of continuous use of GPRS, it may be impossible to generate a call list in time, resulting in the delay in sending reminder messages.

The traffic bill in roaming state will also be delayed.

In addition, the congestion of SMS center will also lead to the delay of reminder SMS.

You can make a complaint and re-check the price according to the traffic package, but it needs to be clear that it is not advisable to rely solely on the reminder message of the operator for your own traffic usage.