How to programmatically start a call on a mobile device?

Question

SIP

hello everyone , the
question is:
how to programmatically (preferably through a rest request) dial a phone number on a mobile device, even with manual confirmation of the call
experience:

1. I tried to use the zadarma.com service (I couldn’t insert a link according to the rules), but when I try to attach authorization to the request as described in the instructions + the call is made from a virtual PBX, which is not necessary to solve my problem
   
   
2. if you use the html page, then the chrome browser offers to send a call to devices tied to a google account, but this does not work with iphone<a href="tel:+7XXXXXXXXXX">