im koreano the one who interested internet trick. he he
but very hard to know excatly how to do this method prperly,
bcoz of there is no simple step by step method.
The first thing you should do is to download the "http injector" app in the playstore. Then search the corresponding .ehi file configuration based on your promo subscriction. Once you download the said .ehi file configuration proceed to import it in the "http injector" and wait for it to connect.