Samsung has announced two new large high-end Android handsets: the Galaxy S6 Edge+ and the Galaxy Note 5.
Both phones have 5.7in (14.5cm) screens and are going on sale earlier in the year than their previous generations.
The launches follow five successive falls in Samsung Electronics’ quarterly profits.
Analysts say the popularity of mid-range phones from Chinese rivals, and Apple’s shift to bigger iPhones, have dented demand for Samsung’s devices.
However, the firm remains the world leader in terms of overall smartphone shipments.
The announcements were made at a press conference in New York.
The company also revealed that its smart wallet service, Samsung Pay – which allows the phones to trigger payment card transactions – would go live in South Korea on 20 August.
That service will be extended to the US on 28 September and then to the UK and Spain at an unspecified date.
The new phones go on sale on 21 August.