Hello. After installing Opera Mini, the default search system is Google. But, a few hours later, Opera Mini recognizes that the mobile network belongs to Russian provider and changes the search system to Yandex. I don't like Yandex, I don't need Yandex, I need Google. Please explain how to remove this foisted Yandex from my Opera Mini. Thank you in advance.

P.S. Of course I am aware how to add Google, how to create shortcut to Google on the speed dial, and so on, but it's not about that ))