I lived in Mexico City for 6 years, and the free wifi are available in a lot of cafes, mostly Starbucks, which you can find everywhere(I'm assuming you would be living in harsh places like Iztapalapa).
Also there are cities, like Puebla, where there are free wifi in almost every public place, like the main square, and a lot of cafes(no Starbucks in Puebla, but I do recommend Profetica, it's an awesome cafe with a beautiful library and free wifi).
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I lived in Mexico City for 6 years, and the free wifi are available in a lot of cafes, mostly Starbucks, which you can find everywhere(I'm assuming you would be living in harsh places like Iztapalapa). Also there are cities, like Puebla, where there are free wifi in almost every public place, like the main square, and a lot of cafes(no Starbucks in Puebla, but I do recommend Profetica, it's an awesome cafe with a beautiful library and free wifi).