Vamos SIMs use the reliant T-Mobile network. Nevertheless, there are still some areas without sufficient Mobile Coverage, even national. In case of connectivity issues, such as the mobile device cannot connect to the network or poor connection, you can use the Network maps to check the signal on your location.
The Mobile Network - National Coverage Map shows the National mobile signal. Using the Postal code you can check the coverage on your location.
The Mobile Network - Outage / Maintenance Map shows the areas of Outage or ongoing scheduled maintenance. Using the Postal code you can check for any actual service interruptions on your location.