Do you know how I can get a SIM card from which company to get data? Any with e-Sim? I've been using rouming data but I've seen that the chip is cheaper!
Rouming currently costs about the same as buying a new SIM card. The only good thing about the SIM card is that for calls in Argentina they don't charge you for international calls!
If it is for a short time I recommend you not to buy if it is a stay of 1 month or more I would recommend you to buy the SIM card!
I would go for anything but Movistar. I don't know anything about the other companies but my experience with Movistar has been so bad I can't imagine anything could be worse even in Argentina