1. Allow dividing messages by group. Thus, users can divide groups for family, work, bank... very convenient.

2. The button to choose to send messages with sim 1 or 2 should be larger and allow to choose different colors (or include different styles such as squares, circles, etc.) to make it easier for users to recognize.

3. The settings section has an option to send messages with the default sim to different groups of contacts. For example, the default sim to send messages to my family is 1, the default sim to send messages to the work group is 2, always asking if it is texting to an unknown number.

During the conversation, I can still switch the sim that will send the message.

In case a contact is located in two different groups, each group is set to receive messages from different default sims (by mistake), the sim selector button in the conversation will show a question mark but be red.

1. When I go to the comment or feedback section, the app should open up the mail app, so I can know what I have commented on, we can also exchange ideas more easily.