Myo Yan Naung Thein started his political career at 21 while studying at the Rangoon Institute of Technology (RIT). In 1996, he led student demonstrations with six other students, demanding justice for police brutalities against students and unfair dismissal of students from the University.
He was sentenced to prison for seven years in 1997. He actively participated in the 2007 Saffron Revolution before being arrested again and imprisoned.
On 3 October 2016, he was arrested under Section 66(d) of the Telecommunications Law after posting a status on his Facebook page which criticized Senior General Min Aung Hlaing, then the police force and Myanmar armed forces' Commander in Chief, Minister of Border Affairs, and Minister of Home Affairs, following an attack by ethnic insurgents on several police stations in Rakhine State.[4][5][6]
On 7 April 2017, Kamayut Township court sentenced him to six months in jail.[4][7] He was released from prison early, on 12 April 2017.[8]
On 26 July 2019, he was suspended from his duties as he was accused of violating the rules of the NLD.[9]
On 13 February 2021, in the aftermath of the 2021 Myanmar coup d'état, Myo Yan Naung Thein and six other high profile individuals (Min Ko Naing, Kyaw Min Yu, Mg Mg Aye, Pencilo, Insein Aung Soe, and Lynn Lynn) were charged and issued arrest warrants under section 505 (b) of the penal code by the State Administration Council for inciting unrest against the state and threatening "public tranquility" through their social media posts.[10][11][12][13][14]
On 4 March 2022, the military council announced that his citizenship had been terminated.[15]