Sonim XP1 mobile phone - one hard nut to crack

February 20, 2008 It's quite a claim, but in the quest to prove that the XP1 is the world's toughest phone US based mobile telecom Sonim Technologies has seen its rugged handset run over by a car, burnt, shot at, encased in concrete, used as a soccerball and even attached to fireworks.

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