S9 single sim 140 pounds more expensive than dual sim?

https://www.amazon.co.uk/s/ref=nb_sb_noss_2/262-3026007-1842054?url=search-alias%3Daps&field-keywords=s9

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I am looking to buy a S9 , anyone knows why the dual sim is so much cheaper? You can have a single sim and a SD card on the dual sim as well, so I dont understand, thanks

Submitted September 24, 2018 at 11:27PM by Azrael699 https://ift.tt/2zqpvDv via TikTokTikk