Not sure about 3G, but here's an example of 2G: https://www.youtube.com/watch?v=CMWvA4Ty1Wk https://www.youtube.com/watch?v=CMWvA4Ty1Wk Edit: same as already p

Not sure about 3G, but here's an example of 2G: https://www.youtube.com/watch?v=CMWvA4Ty1Wk https://www.youtube.com/watch?v=CMWvA4Ty1Wk Edit: same as already posted hackaday, oop!