Cape Verde → Guinea-Bissau
Cape Verde plugs
Type C
Type FGuinea-Bissau plugs
Type CType FShared plug types: C, F
Compatibility: Compatible
Voltage — Cape Verde 230V — Guinea-Bissau 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.