It was, and still is, a staple import of the united kingdom, which at one time had possession of the 13 colonies of America, India and Hong Kong. As such, these three countries maintain to this day a strong trade network with the UK and her former colonies.
Definitely cell phone reception! However books could be argued for since they also are a good more than a necessity. However the last 2 i believe would be classified more as necessities than goods.
~Hope this helps!~
