Turns out that when Russians use Ukrainian phones, they get a regular stream of texts inviting them to surrender.
This guy did so, bringing an undamaged battle tank with him, and he receives a financial reward as part of the surrender package.
War is so different today.
http://www.dailymail.co.uk/news/article-10656603/Russian-soldier-surrenders-TANK-return-7-500-Ukrainian-citizenship.html