The United States dollar is the most used currency under the multi-currency system that was adopted in early 2009. There is now a severe lack of dollars at ATMs, making USD withdraws very difficult.
It is best to take physical money notes into Zimbabwe in your hand luggage and declare them on arrival at the border/airport. Bring numerous small bill notes, e.g. $1, $5 and $10 into the country as notes of small value are not very common and cannot be easily exchanged for large note sizes, e.g. $50 and $100. Do not bring in USD and Euro coins as these are not used. Use the international money exchanger Mukuru to import money at a low cost. Euros and Pounds are not used in most parts of the country.