@Kevin_Z After restart or band selection b3 + b40 is working for 30 to 50 seconds. After that it is permanently switching b40. That means in my area b3+b40 is working. One of youtuber also mention...

I am using MR600 V2 with jio sim in India. B3 + B5 is working. B40 + B40 is also working, which is good. B3/B5 + B40 is not working. For that case only giving priority to B40 and it is working as B40...

@SR1646 No, if your bands mode is automatic or you select only B40 or you select two bands including B40 then it will work automatically. How you know that B40 + B40 is working or not? First open...

I am using MR600 V2 with jio sim in India. B3 + B5 is working. B40 + B40 is also working, which is good. B3/B5 + B40 is not working. For that case only giving priority to B40 and it is working as B40...