I've already searched the Huawei website (which is not impressive) and the documentation (in Japanese), but I haven't been able to figure out which model corresponds to the GS02 from eMobile. The obvious place to look was the Settings -> About phone -> Model number, but all it says is "GS02". The Google Play also identifies it as an "EMobile Huawei GS02", but there doesn't appear to be any mention of such a device among the many models listed here...