What should I do if I receive a call reminder several months after my mobile phone was stolen?

Unused or lost mobile phone cards must go through the cancellation procedures in the self-run business hall, otherwise there will be arrears. You can take your original ID card and the reminder you received to the nearest self-run business hall to find out how much principal you owed at that time and how much the late payment fee was. The general business hall has the right to reduce part of the late payment fee, depending on how you negotiate with the business hall, but the principal must be borne by yourself. In addition, see if there is a cancellation number now. If there is no cancellation, let's see if there is any cancellation.