I am facing a weird problem. Not receiving SMS on sim 1 when dual sim 4g is turned on. I am using Airtel in slot 1 and Jio in slot 2. The last option which says
Dual sim 4G
From your screenshot it looks like phone is using SIM 2 as the SMS card. Can you select that option and manually switch it to SIM 1?
Thanks for your reply. I changed it to sim 1 but still same problem. If I turn off dual sim 4g, everything is working fine. I also checked SMSC numbers for both Sims. They are working fine . Problem is only when I switch on dual sim 4G. Also if I switch data to sim 2 and turn on dual sim 4G everything is working fine again. I am thinking this might be an issue with Jio sim but not sure.
Some users with similar issues have reported that changing their physical SIM card has made a difference in connection. Although I believe you are the first with a dual SIM configuration.
Can you give me your firmware version as well please?
Have you tried switching place of the SIM1 and SIM2? We haven't heard that there is any issue with the "dual SIM 4G" option so hopefully it's just the combination of your two cards.
Go to a Jio or Airtel store and do some more testing with a borrowed sim. I'm hoping that it will work if you change one of the sims for a newer one. If this is the case, then they can help you in the store.