Mine is a production unit. IMEI ending in 104253. As I´ve seen a few of them lately, and the last 6 digits of the IMEI I´ve seen seem to consistently rising, by each production week, I believe that means its pretty early in the production run. Also if he OP says he´s had it for just over a month we´ve got to assume it´s not a pre-production unit, as those were handed out around 2.5 months ago.