Sorry if this is in the wrong forum

I just wondered if this is possible, input the 2 month trial code and than once Im all connected, add my 1 year code from my starter kit , giving me a total of 14 months??????Or could you do it the other way round ?? i spoken to many people who said they have done this, but I have also spoken to peeps who say its not posssible.

So I just wondered if anyone here could answer this.

Cheers