The only ones who can answer this question with high accuracy is SE themselves, why not give the SE service in your country a call and ask them what to do. It's not like you're burning any bridges if you do that, on the contrary. I think they give you an address to a local service centre where you can drop it.
I suppose you don't have the original receipt so ask about that when you call SE. I read in the English pdf manual SE has 2 years warranty on the phone and every phone sold lays in that time frame. I know warranty time can vary but my guess is its 2 years worldwide since that pdf file is accessible for everyone at their web page.