ITAu ATM did not work with my English Mastercard. Also showed a fee of R$12. Didnt proceed with transaction.

Use Decline Conversion when prompted at Banco Union ATMs - itll save you from unnecessary fees.

Used my UnionPay card at ING. ATM didnt show any fees on screen, but charged me anyway. Take the receipt to double-check!

Used my Revolut card at JTRUST/ANZ - got charged a $5 commission. ATM showed what small bills were available. Helpful!

KCB can get quite crowded at times. Go during off-peak hours.