How do you get vital information to someone who is poor and is being oppressed in a far away country? How do you ensure that such information is not interruptions or jammed by governments?

Shortwave is your answer.  A shortwave radio can receive transmission on frequencies between 3 and 30 MHz. They offer the possibility to transmit over for long distances.

Shortwave broadcasting sites use Antenna Arrays supported by miles of wires suspended in the air or buried in the ground. These arrays are used to direct signals toward the ionosphere. Using calculations based on electronic directionalizing, power, and atmospheric conditions, these antennas project their signals so they will come down on specific target areas around the world.

A receiver can then tune in to listen to information being broadcast. A simple receiver able to receive some desirable frequencies is all that is need.

The shortwave radios are widely available. Repressive governments find it difficult to censor them.  In places where there is no electricity, hand-cranked shortwave radio can last indefinitely. Shortwave radio travels much farther than broadcast FM (88-108 MHz). Shortwave broadcasts can be easily transmitted over a distance of several thousands of kilometers, i.e. from one continent to another, especially at night.

Major broadcasting corporations such as Voice of America and BBC World services continue to use shortwave in their international broadcasting.