While working towards his PhD in international relations at Corvinus, he was ordained as a Reverend Minister by Dr. T. L. Osborn and Archbishop Benson Idahosa in the United Kingdom.

[citation needed] Tetteh was ordained a Reverend Minister by Dr. T. L. Osborn and Archbishop Benson Idahosa, establishing the Worldwide Miracle Outreach.

[10] He engages in ecumenical relationships, working with various mainstream and Pentecostal churches like Anglican, Methodist, Presbyterian, Catholic, Apostolic, and Assemblies of God to spread the gospel in Ghana and around the world.

[20][21] Tetteh has also commented on religious leaders practicing what they preach and voiced his opinion on herbal medicine, stating that it is not inherently fetish.

[22] In 2018, he called on the Prince of Wales, who was the head of the Commonwealth at the time, to use his office to grant amnesty to law-abiding Ghanaian citizens without regular stay in the United Kingdom.