Brazilian SIM card for 4 month stay

Any opinions on what is the best pay-as-you-go SIM card? I don't want to get stuck in a contract that I can't terminate when I will leave Brasilia in 4 months. Thanks,

@EricPau i used tim. Good service.

Stayed for 3 months using TIM had no issues

Vivo is great, wifi speed also seems to be faster than Claro. and you can use it in Uruguay as well.

I use Claro, pre-paid, R$60 a month gets me more data than I can use short of streaming movies

@rraypo I teach online so the unlimited Gb works better for me. It's really horses for courses.

@rraypo I teach online so the unlimited Gb works better for me. It's really horses for courses.
-@ltoby955

My wife and I have been teaching online for a decade, college

Thanks folks, appreciate your comments!

@rraypo me too, Skype and google use almost half a gig for a one-hour video lesson hence why I go for unlimited. I teach Dyslexics that's been my specialism for over thirty years and it's so important to teach through the visual. Have a great weekend.