The reasons and solutions are as follows:
1, confirm whether the watch has loaded the card, the watch must be loaded with the card, the size is not inserted;
2. Check whether the watch card is installed correctly. The installation direction of the watch card is metal toward the top, the missing corner toward the inside, and the flow card cannot be installed;
3, check whether there is a signal after the watch is loaded, the signal cell in the upper left corner should be at least 2 cells above;
4, check whether the watch has been turned on, the watch must be turned on to operate the APP;
5, whether the watch card opens mobile phone traffic, whether there is a call fee. Call the operator to consult whether the mobile phone traffic can be used normally;
6. Whether the ID of the watch sticker is the same as the ID of the device list. You can log in to the APP, click \"My\