Cuba’s government said it provided free internet to the Communist-run island’s more than 5 million cellphone users on Tuesday, in an eight-hour test before it launches sales of the service.

Cuba is one of the Western Hemisphere’s least connected countries. State-run telecommunications monopoly ETECSA announced the trial, with Tuesday marking the first time internet services were available nationwide.
https://in.reuters.com/article/cuba-internet/cubans-cheer-as-internet-goes-nationwide-for-a-day-idINKBN1KZ2CO

Also see:

For 9 Hours, Cubans Got Internet in an Unusual Place: Everywhere
If you walk through Havana, you’ll usually see groups of people huddled around certain plazas, parks and side streets with their cellphones held up to their faces. These people are online.

In order to post a picture to Facebook, send an email or read the news, Cubans must buy an internet access card for about a dollar from Etecsa, the state-run telecommunications company, and then find a public hot spot — but that all seems set to change.
https://www.nytimes.com/2018/08/15/world/americas/cuba-internet-mobile-phones.html