Creating a SIM card slot feature in my app (like phone app) that must change while dialing a number depending on the SIM -- 3

I am building an app that using for dialing Unstructured Supplementary Service Data for paid services in Somalia. What I want to do is: How Can I create a SIM card slot (like phone app) that must change while dialing a number depending on the SIM that I chose when I choose for example (Telesom) option or (Somtel) option in Preferred Sim card (like Phone app)

Here details of my project: https://adeega.xisaabso.online/dirsoapp.php