Compare the plug shapes, voltage and frequency in Oman and South Korea, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Oman, you will need a travel adapter for South Korea. Oman uses Type G plugs, and South Korea uses Type C/Type F, so the pin shapes will not fit any wall socket. The mains frequency is also different (50 Hz vs 60 Hz). This rarely matters for electronics but can affect motor-driven devices like clocks and shavers.
Frequency differs (50 Hz vs 60 Hz). Rarely an issue for most electronics, but can affect motor-driven devices like clocks and shavers.
Oman (home)
South Korea (destination)
Electrical specifications in South Korea
Voltage
Frequency
More about plugs in South Korea
In South Korea, the standard power plug is Type C and Type F. The country runs on 230 volts at 60 Hz. That means wall sockets in South Korea can be one of 2 different shapes — Type C, Type F, and your plug needs to physically match the socket to fit.
Full South Korea plug guide