Just made a mobile to another mobile from Australia to UK and was amazed by how clear and non laggy it was. How does the signal get sent back and forth from one side of the world to the other? Satellite or cable? Radio or fibre optic?
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I’ll add, even though it has already been well answered! You might want to check out this link: [https://www.submarinecablemap.com/](https://www.submarinecablemap.com/) These cables were first introduced about 100 years ago for telegrams between North America and Europe, still the best way to get messages across oceans.
Shows all of the cables underneath the oceans, the math is broken down by u/Prestigious_Carpet29. SAT Communication is also possible, again some delay occurs depending on signal travel time at the speed of light to the satellite, to the user on the other end, back up to the satellite and down to you with the response but way too fast for us to notice.
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