If you have 4k Android or smart tv, then Airtel 4k stb is not useful. Also in a side by side comparison TS 4k stb had better pq. If you do not need internet tv features, go for TS.
Congo bro and please some snap also screen shot of channel sideby with 1080 and upscaler to 4k so it vi be easy to compare and people can choose if they want to buy in future.
I think sun direct will bring 4K channel soon since all their HD stb are 4K capable using HEVC decode. Also they tested Dolby atmos sound recently. So next year, we can expect