What code do you dial to make a phone to Ghana from nigeria?

Mobile numbers in Ghana begin with the following prefixes:

Vodafone: 020 or 050

Glo Mobile: 023

MTN: 024 or 054

Zain Airtel: 026

Tigo Millicom: 027 or 057

Kasapa: 028

Within Ghana, dial the mobile code and the 7-digit subscriber number. From outside Ghana, replace the leading zero of the mobile code with Ghana's country code +233. The plus sign means "insert your international access prefix here." Different countries use different prefixes, including 00, 011, 009, 0011, and 010.

(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)