How to use dual-card mobile phones, all of which are telecom, how to set them up?

Hello, two telecom mobile phone cards need to activate the volte function at the same time, and then activate the volte function on the mobile phone, so you can install two telecom mobile phone cards at the same time. When telecom users activate volte, they can edit the ktvolte send 100 1 or activate volte service through telecom customer service. Anhui Telecom WeChat official account is at your service.