My DW Contacts was working fine before I was using 4G sim but after 4G it automatically sawaps the sim, ie when u dial from SIM 1 it dials from SIM 2 and vice-versa.
I selected Swap SIM card option in Dual Sim card Configuration, but after restart it again goes same Dial from SIM1 it dials from SIM2
Please see and remove this error at the earliest
Problem with 4G SIM
Re: Problem with 4G SIM
Please try different devices in dual card settings.