Convert smart phone to smart watch

[Android Central Question]

Hello guys, I have old android phone from Samsung. and, I want to use it as asmart watch to control in my main android phone "make call, send massage and so on",
so if you know any idea to link these mobiles together to make that, please tell me
Thanks for helping

 

[B. Diddy]

Welcome to Android Central! You want to use an old phone as a watch? As in strapping it to your wrist?

Instead of doing something clunky like that, why not just use Google Assistant?