I tried it in iPhone 6s itself. It does support carrier aggregation. In same area where single band handsets get 20-22 Mbps. At same location , I am getting 33-35 Mbps with iPhone 6s
Problem with xiaomi, is their is no clearcut documentation about carrier aggregation. I would drive clear away from xiaomi with carrier aggregation.[DOUBLEPOST=1497301751][/DOUBLEPOST]You won't find it officially on xiaomi site about carrier aggregation support.I might be mistaken but IIRC Jio's CA is on Band 3 and 5.... your screenshot is currently showing "1 carrier(s)" on Band 40. And appears that your phone does support bands 3 and 5.
So maybe you should plan a visit to this RCP area to check if this NSG app shows "2 carrier(s)" on B3+B5
Though this page does not list your phone: https://en.wikipedia.org/wiki/List_of_devices_with_LTE_Advanced#Xiaomi so maybe even though the CPU supports CA the phone is using a non-CA-capable modem.
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