4G access in Brazil, best plans?

Hi, I am staying in Brazil (Fortaleza region) in september/october 2019. I will have Wifi access normaly… But to be sure i’d like to take a SIM card in Fortaleza for 4G data access for one and a half month.

Do you have advices on the best plans and where in Fortaleza to buy one (preferably near airport/bus terminal)


Note: I can use my wife’s CPF