In the phone call, he was back to his energetic self and likened the procedure to a burden that had been taken off his back.
"I am full of energy. I think dialysis had taken a toll on me. Now I am slowly going back to how I used to be. God is so good."
He also reserved special praise for his friends Hiram Mungai, popularly known as Ondiek Nyuka Kwota, Mathias Keya - Alfonse Makacha Makokha and Lucy Wangui - Judge, who were with him in hospital and kept supporting him in any way they could.
Savings and investments
His advice to TikTok stars and other internet sensations, save and invest!
In his last conversation with this writer, Gathu urged the current crop of entertainers to plan well, save and invest to ensure a decent living for their offspring.
He advised them not to mix work and pleasure as the fame is often short-lived and the same people who gas them up on social media are the ones who will troll them when things go south.
"The entertainment industry is very dynamic and unlike our time, there is more money nowadays. You might be tempted to move to an upmarket estate after landing your first gig.
"Eat some but save some. We were taught that if you cannot manage Sh5 then even Sh5million will be a problem," he said.
Adding: "Most of us have a fallback plan because we invested."
May his soul rest in peace.