I am currently in one year tamil economy plan. If i upgrade the sd to hd stb will the pack remains active. Can I continue using that 1 year plan and can i activate hd channels only when i needed like ala carte or is it compulsory i should buy a hd pack when using hd stb. Pls clarify. I want hd channels only for live cricket, football matches. So is it possible to activate hd pack only when needed.