@sanjay Went to Mexico and it was a very seamless experience. As soon as I landed, turned my phone on, and after a few minutes it connected to a local carrier. Speeds depend on how good the 3g is in the country you're in.
compared the data price to the prepaid card you get for 2 countries i know well (france and israel). this is insanely expensive: any package below 500mb is just not usable for a normal "pro" users. you better off buying a card locally if you stay more than 2 days
Denarri