Mobile daily SMS prompts arrears.

There are two possibilities, one is the phenomenon of unreasonable charges and the other is excessive traffic, so you didn't open the superimposed package, so he directly deducted the balance. If you really want to know what happened, call customer service to find out. If he refers to the traffic problem, you ask him to tell you how the traffic is used and when a lot of traffic is used, which leads to downtime. Because the customer service is from the company, he has to speak for the company. If you don't ask anything, then you will suffer.