Onana was a surprise inclusion in the Indomitable Lions squad for their final Africa Cup of Nations qualifier against Burundi announced last week.
The recall came just eight months after he sensationally called it quits after falling out with manager Rigobert Song during the 2022 FIFA World Cup in Qatar.
The 27-year-old, who has 34 caps for the Indomitable Lions, started their 1-0 defeat to Switzerland in their opening World Cup game before clashing with Song over his playing style.
Onana has however taken to social media on Monday to reiterate his commitment to his country.
He wrote: “In the world of football, as in life, decisive moments arise that require crucial choices to be made.
“In recent months, I have been confronted with trials marked by injustice and manipulation. Yet my unshakeable love and attachment to my homeland, Cameroon, remain intact.
“My desire to represent my country has never wavered since my youth, and this aspiration remains an inseparable part of my identity. Nothing and no one can shake this conviction. I answer my nation’s call with unshakeable certainty, aware that my return is not only to honour my dream, but also to respond to the expectations and support of Cameroonians, who deserve a national team determined to shine.
“In the face of manipulation, lies and abuse of power, I choose to remain true to my ideals, proudly representing a country that deserves our sincere commitment. Now is the time to unite, to work in harmony for our common good: Cameroon.
“I would like to salute the government, which is working hard to build a better Cameroon for all. My thoughts are with the people of Cameroon, to whom I offer my infinite thanks for their support, and whom I look forward to seeing again.
“Time, the infallible judge of all things, will eventually enlighten us and reveal the rightness of our actions. My commitment to Cameroon remains unwavering, and I am determined to play my part in seeing it prosper.”
Cameroon need to avoid defeat to book their place at next year's tournament to be hosted in January and February by Ivory Coast.
