Hey. Yep, you need to take all the document you applied with (printed, I beleive).
And yes, they usually ask to open the banking app on your phone.
Could you please share your experience in more details after the interview? I am planning to go through the same pats as you (also with myai thai also in Laos). Would really appreciate.
Could you please share how many days after you have paid 10k they scheduled the interview? Or simply, when did you pay (since you already told the interview date)?