I got a text message asking me to call back. After I called back, my mobile phone was detained. What happened?

You answered a pay phone, some charged according to the number of times, and some charged according to the connection time. Usually, these allegations are very serious. Do not reply to text messages or phone calls with unknown or special numbers, and finally call the operator to inquire whether to handle other teaching fees. If yes, cancel immediately. Now there are more and more swindlers and the means are more and more advanced!