Dual standby


Feb 7, 2021
After updating to 12.1.5 on china ROM, i don't have dual SIM standby anymore. I flashed to EU, and the problem continues.

If I choose SIM1 for data, then SIM2 is automatically off. If I choose SIM2, then SIM1 is off.

The weird thing is that I travelled to another city and on some parts of the road both SIM were on.
I'm having same issue with a mi10 and a mi10pro, if you find out how to fix it please let me know