I haven't tried to swap the slot, good idea if it's working for everyone. Thanks to share it. With 5.4 my sim was recognised but in settings menu was written that was "temporarily unavailable". It was in slot 1. Everything else seems to work fine for me. However I think the 5.4 update has a lot of problems, I prefer to wait for the next one.after updating SIM1 slot doesn't work, but SIM2 slot seems to work. is anyone else experiencing the bug?
I managed to go back to 5.2 with a couple of bricks, making a clean flash loosing all my datas.