So this Redmi support one sim on 4g and the other sim should use
3g/2g if I'm not mistaken.

My configuration is this:
Primary Sim: Digi (Suspect its a non 4g card because never can lock to LTE)
Secondary SIM: OneXox

For some reason if I turn off 2nd SiM, and set my Digi to Prefer 2g for battery Saving, I can never turn OneXox second sim on.

Anyone knows why?

Under secret code 4636 I can actually turn second SIM ON, it can only receive SMS.

But on Setting menu, 2nd SIM can never ON again until a reboot is done.

This post has been edited by filage: Aug 30 2021, 09:39 AM