Last night I used my free time data to download movies as usual, and I started downloading movies as soon as the time came (because the monthly rent was deducted today. I still have more than 1G of free time data, which is a pity). When I checked it this morning, I was dumbfounded! I used up all the 500 I brought with me, but I also used more than 120 in airtime! The free-time traffic is useless (because the monthly rent is deducted today, there is traffic. My card comes with 500 MB of daily traffic and 1.5G of free-time traffic). I'm surprised! Isn't it the end of free time yet? And why not use free time traffic? ! There are pictures and the truth→_→

(img )http://bbs.7723.com/Down/Photo/2014_03/27465_01032711_TO2T.jpg(/img)
Then I spent the whole morning on the phone with China Unicom customer service. I used various excuses, from the front desk to the back office, and called 10010 dozens of times... I finally got my phone bill and traffic back!

Is this a system vulnerability?