On Dual Sim phones, the button to change which sim the text is sent from is too close to the send button and it is not immediately obvious when the Sim is changed accidentally. I accidentally hit the button way too often and only find out after I have already sent the text. It would be great if the app had a way to organize messages by Sim card in completely different pages such as "Work" and "Personal". There is currently no SMS app that I know of that supports this feature.