Typical reasons for communication loss with Cuban residents: 1
Typical reasons for communication loss with Cuban residents: 1. Power and internet outages (temporary, usually resolved within 48 hours). 2. Device malfunction or loss (most users will borrow another device to restore contact via WhatsApp/Facebook). 3. Prolonged silence (usually indicates intentional discontinuation of contact).
When traveling to Cuba (CU), be aware of potential mobile network issues, especially during power outages
When traveling to Cuba (CU), be aware of potential mobile network issues, especially during power outages. Cellular service may degrade, impacting even eSIM functionality. It's advisable to check network coverage in advance. In case of network instability, SMS messages might be more reliable for communication when a signal briefly returns.
In Cuba, during power outages, mobile phone calls are often unreliable or impossible
In Cuba, during power outages, mobile phone calls are often unreliable or impossible. A more effective and cheaper communication method is sending SMS messages. These messages will be delivered to the recipient once a mobile signal becomes available, making them a practical solution for communication during signal disruptions caused by lack of electricity.
Global eSIM providers have largely removed Cuba from their coverage lists
Global eSIM providers have largely removed Cuba from their coverage lists. While some legacy eSIM profiles activated in 2025 might still function, new activations are currently unavailable. Recommended alternatives for internet access in Cuba: 1. International roaming data packages provided by home mobile carriers. 2. Purchasing a local Cuban SIM card directly at official ETECSA offices (note: topping up local cards often requires physical presence in an office). Payment via Russian MIR cards is generally not accepted for international eSIM services.
If a travel booking website for Cuba fails during payment, it is likely due to IP filtering
If a travel booking website for Cuba fails during payment, it is likely due to IP filtering. Users accessing from US-based VPN nodes may face errors. Advise switching the VPN location to a non-US country.
Travelers purchasing local SIM cards from Etecsa in Cuba frequently report that one-time registration SMS messages…
Travelers purchasing local SIM cards from Etecsa in Cuba frequently report that one-time registration SMS messages (OTPs) for local applications like La Nave (taxi) or Truecaller do not arrive. Etecsa support cannot resolve this issue. It is highly recommended to register and configure all necessary travel and local services using a foreign phone number before arriving in Cuba.
Internet connectivity in Cuba is highly unstable and unsuitable for remote work
Internet connectivity in Cuba is highly unstable and unsuitable for remote work. Mobile data (3G/4G) is prone to massive packet loss and outages. Telegram is reported as significantly less reliable than WhatsApp, though both suffer during power grid failures. Local residents often rely on specific, non-public workarounds or niche residential ISPs to bypass the limitations of state-run infrastructure. Starlink usage is technically prohibited and carries legal risks, though users may encounter it.