This story was originally published August 26, 2018

(CNN Business) When Terence Kwok went traveling to Europe as a student in 2011, he returned home to a $900 phone bill.

For the frequent traveler, who was then 20 years old and studying at the University of Chicago, that incident turned into a money-making opportunity.

"It made me realize that, even with smartphones, staying connected while traveling abroad was highly costly and inconvenient," Kwok said.

To solve travelers' internet woes, Kwok created Handy , a cell-phone designed for guests staying in hotels overseas.

Handy allows guests to use 3G internet and make unlimited calls. It features local travel guides and controls for things like lighting and curtains in the hotel room — but it can also be taken out and about like a regular phone.

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