Samsung appoints Taemoon Roh to head its smartphone division, taking over from Koh Dong-Jin to run the world's largest mobile devices business
- Taemoon Roh will now steer the world's biggest mobile name — Samsung seeks to take the lead in 5G and foldables this year
Context & Ripple Effects
Taemoon Roh inherits a division that has been through repeated leadership resets: Koh Dong-Jin took over day-to-day mobile operations in December 2015 amid dwindling sales, then survived a broader reshuffle when Samsung named three CEOs across chips, consumer electronics, and IT & mobile in October 2017.
The handoff matters because the mandate shifts with the man: where Koh steadied the business after a sales slump, Roh is explicitly charged with taking the lead in 5G and foldables. The arc runs long — five years later Samsung merged mobile with consumer electronics under JH Han (the December 2021 division merger), and by late 2025 Roh had risen to co-CEO and head of the combined DX division.
First-order effects
- Roh takes direct control of the world's largest mobile devices business, with 2020 success measured against two named fronts — 5G handset leadership and the foldable lineup.
- Koh Dong-Jin hands off day-to-day operations after roughly four years running the division, ending a tenure that began with a turnaround mandate in 2015.
Second-order effects
- Rivals racing Samsung on 5G devices face a competitor whose mobile leadership is freshly aligned around that exact priority, raising the stakes on launch cadence and carrier partnerships.
- Samsung's foldable push under new leadership pressures other Android makers to field credible foldable alternatives rather than cede the premium form factor.
Third-order effects
- The succession continues a pattern of frequent division-level resets at Samsung — 2015, 2017, 2020 — that culminated in structural consolidation: the 2021 merger of mobile and consumer electronics into one unit, and Roh's eventual elevation to co-CEO overseeing the combined DX division.
- If the pattern holds, Samsung treats device leadership as a proving ground for group-wide command, with mobile chiefs promoted upward rather than divisions run as static fiefdoms.
The trend: Samsung is cycling mobile division chiefs faster while steadily consolidating device businesses under fewer leaders, with each handoff tied to the next technology bet — here 5G and foldables.