I recently added a second sim to my phone as I travel between two countries so use the local sim for the country i'm in at the time.
In SIM car manager, under 'More SIM card setting', the 'Dual SIM always on' is currently 'off' as i accidentally switched it off. What does it mean when toggled 'off', when i try to switch it back on, after 20 seconds of loading, a notice says 'Failed'.
See attached for details.
Any help much obliged as to whether i need to turn this back on and how to do so!