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Super easy build and it can save you a ton of loot on getting a smart phone holder for your vehicle. It costs pennies and you only need sissors, and or a knife, rubber band and a sharpie...
Bonus Points for using a Tim Hortons cup! :)
Cool. I made something similar for my mobile hotspot out of a cardboard roll for kitchen towels. If we have bad weather, the mobile hotspot needs a specific orientation to pick up the 3G signal, so the basic principle works great for different gadgets.

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