1. If I had a DMB phone, I would watch the drama here.
2. As I don't have a DMB phone, I can't watch the drama here.
3. As I don't have a DMB phone, I don't watch the drama here.
------------------------------
Is #1 close to #2 or #3 in meaning?
yes, #2 and #3 would usually be interpreted to mean the same as #1.
Since the point is being made that you don't/can't watch the drama without a phone, the implication is that you would watch it if you could.