Why was the electricity bill deducted without receiving the electricity bill SMS notification?

Electricity bill text messages are sent in batches, and sometimes the SMS channel may be blocked, causing the electricity bill text messages to not be sent to your mobile phone in time; the deduction text message is automatically triggered by the system after the electricity bill is successfully deducted, and the batch deduction time is different, so Text messages are sent at different times, and generally there will be no congestion in sending text messages, so it may happen that the text message with successful electricity bill deduction is received before the text message for electricity bill.