Mongolia → Germany
Mongolia plugs
Type C
Type FGermany plugs
Type CType FShared plug types: C, F
Compatibility: Compatible
Voltage — Mongolia 230V — Germany 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.