Samsung’s head of mobile design has stepped down, following lackluster sales of the flagship Galaxy S5 smartphone.

Chang Dong-hoon will now take over Samsung’s (SSNLF) design strategy team, a Samsung spokeswoman confirmed. Though Chang’s responsibilities will still include working on mobile products, Vice President Lee Min-hyouk will take over as head of mobile design. Lee has played a large role in the development of the Galaxy smartphones.

Samsung didn’t offer much about the reasoning behind the move, except that Chang now has more time to focus on long-term strategy.

Reuters was the first to report on Chang’s new role.

It’s not clear how much the sales performance of Samsung’s latest flagship phone factored into Samsung’s decision. Customers have also complained about a faulty camera sensor on some Galaxy S5 phones.

But what is evident is that both the hardware and software components of Samsung’s devices have grown increasingly stale in recent years.

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