Because Samsung Developers are dumb, they remove the easiest part in sending messages and calling with 2 SIM. They replace it by going into the option to select the SIM you wanted. Please take note to select it first else all the messages you type in will be wipe out. Before its just like having a front door so you can get in instantly, now you need to use the backdoor with invisible doorknob. What a useless idea.
Same here. It's quite complicated since we need to switch sim cards easily to send messages. Hoping that samsung will do something about this, probably return the option again, if not on the next software update or at least, update the messaging app.
