https://r2.community.samsung.com/t5/Galaxy-M/SPEED-OF-JIO-5G-IN-M13-5G/td-p/12719264As per this thread, the device does support 5G. Check once more that:1. you are sure that you have received SMS from Jio that 5G is enabled on your sim.2. MyJio app s...
You don't have to swap or upgrade the sim. But Jio has to addon Welcome plan to your existing plan for you to access 5G. Currently Jio is doing this for several users daily based on their device model. So there are a lot of users in 5G coverage for w...