SEOUL— Samsung Electronics Co. wants to move on from the Galaxy Note 7. Doing so might not be easy.

Two weeks after scrapping its fire-prone smartphone, the company on Thursday revealed a significant hit to its bottom line, pledged a “thorough” and “open” investigation into the phone’s problems and elevated third-generation heir apparent Lee Jae-yong to his first board seat.

But problems remain for Samsung: It won’t have a new flagship smartphone to sell until its Galaxy S8 launches in four months’ time; executives appear to be no closer to identifying the source of the overheating problem plaguing its ill-fated Note 7; and the company doesn’t know how much the recall has undermined faith in its products.

Samsung, which on Thursday reported a 96% year-to-year plunge in quarterly operating profit in its mobile division after discontinuing the Note 7, finds itself without a buzzworthy product at the same time profit margins and mobile sales are under pressure.

With its Note 7 out of commission after a two-month-long debacle that has cost it more than $5 billion in recall expenses and lost sales, Samsung will have to get through the holiday shopping season with the Galaxy S7, a device that has been on shelves since March this year.