Dual Sim and Messaging
I have a similar issue. I just installed Dual Sim yesterday and I can switch back and forth when making calls. In Messaging, however, I don't have that option in the Message Application. The only way I can control is to go into settings, then pick which no. I want to initiate the text message from. That's a huge and unnecessary hassle. When I open the Message App there is no window or icon I can access to switch which no. I want to text from.
iPhone 11 Pro, iOS 14