Internet problems coincide with Cuba keeping daylight saving time

On Sunday, November 1, users in Cuba reported that some phones lost internet access or had mobile-data problems. The reports coincided with the decision to keep daylight saving time without setting clocks back. Some devices displayed a time different from the official time after automatic adjustments, while other people described difficulty connecting and browsing.

ETECSA explained that certain phones showed a different time from the official one and recommended manual correction. The guidance addressed users who found a difference between their device clock and the current time. Connection complaints included mobile-data interruptions and trouble reaching the internet, although user reports alone do not establish that one issue caused the other.

Problems described included difficulty joining the 4G network and phones relying on a shared connection for browsing. Mag Jorge said she received reports of mobile phones losing connection after the time change and asked others whether they had the same experience. Those reports reflect experiences communicated by customers, not a nationwide service assessment.

On October 24, the ministries of Energy and Mines and Labor and Social Security announced that Cuba would retain daylight saving time, UTC−4. The measure came amid the island's severe energy crisis. When that time remained in effect on November 1, devices configured to change automatically could become misaligned with official time.

The day therefore brought together two separate issues: differences between the time shown on some phones and the official time, and complaints about connection difficulties. ETECSA recommended manually correcting clocks, while users reported problems with mobile data, browsing and 4G access. Their temporal coincidence does not establish that automatic time adjustment caused the internet interruptions.