Cuba's government said it provided free internet to the Communist-run island's more than five million cellphone users on Tuesday, in an eight-hour test before it launches sales of the service.
State-run telecommunications monopoly ETECSA announced the trial.
Tuesday marks the first time internet services were available nationwide.
There are hundreds of WiFi hotspots in Cuba but virtually no home penetration.
On the streets of Havana, mobile users said they were happy about the day of free internet, even as some complained that connectivity was notably slower than usual.