United Kingdom → Oman
United Kingdom plugs
Type GOman plugs
Type GShared plug type: G
Compatibility: Compatible
Voltage — United Kingdom 230V — Oman 230V
Voltage is the same. Your devices should work normally.
Device compatibility (phones)
Phones almost always support 100–240V, so yours should work safely. Check your charger label to confirm.
You likely only need a plug adapter (if socket shapes differ). Voltage is close between these countries.