Samsung is replacing the head of its mobile design team.

A Samsung spokesperson told Reuters Chang Dong-hoon offered to resign last week and will be replaced by Lee Min-hyouk, vice president for mobile design.

The move will allow Chang to focus more on his role as the head of the design strategy team.

Chang’s reassignment comes on the heels of a presumably chilly response to Samsung’s new flagship phone, the Galaxy S5. Reviews for the device have pegged it as too iterative of its predecessor, the Galaxy S4.

In spite of its reception, Samsung still seems confident in the device’s ability to perform in the high-end smartphone market. Yoon Han-kil, senior vice president of Samsung’s product strategy team, in April told Reuters that the S5 was outselling the S4.

Last year, Samsung revealed it had moved 40 million units of the S4 in the first six months after its launch.

In its 2013 fourth-quarter smartphone sales report, Gartner figured Samsung sold more than 83 million smartphones, good enough for 29.5 percent of the market and a substantial lead over Apple’s second-place 50 million units sold.