Call in contact list

I wanted to ask something, do you know how to call a contact in the contact list?

use the phone call component

if I know that but I do not know how to put it together

Check out the Thunkable YouTube channel, there are lots of great videos for getting started:

A very good way to learn App Inventor is to read the free Inventor’s Manual here in the AI2 free online eBook … the links are at the bottom of the Web page. The book ‘teaches’ users how to program with AI2 blocks.
There is a free programming course here and the aia files for the projects in the book are here:
How to do a lot of basic things with App Inventor are described here: .

Also do the tutorials to learn the basics of App Inventor, then try something and follow the Top 5 Tips: How to learn App Inventor

Help help me for find APK certificate where I found my certificate for some reason I don’t have my apps certificate my app is live on play store I try many time to update this app app name is HP board result and my account in [email protected]