How to handle a telephone watch with an adult supplementary card?

Using an adult secondary card for a telephone watch requires the following steps:

1. First of all, to buy a phone watch, you need to purchase or open a SIM card package that supports the use of the watch, and install the SIM card on the watch.

2. Then, you need to download the APP corresponding to the mobile phone watch, register and log in your account on the APP, and bind the watch to the account.

3. Finally, set the phone number of the parents in the APP so as to contact the parents when necessary. If you need to add an emergency contact, you can also set an emergency contact in the APP.

It should be noted that the specific operation steps may be different for different brands and models of telephone watches, so it is recommended to refer to the specific user manual or instruction manual for operation.