There are many alternatives, including global and semi-global SIM cards that work almost everywhere or in the slate of countries you are likely to visit.
These 10 competitors were selected through an online contest that showcased 25 semi-finalists of the fellowship program run by Echoing Green, a global nonprofit that provides seed funding and technical assistance to emerging social entrepreneurs.
The programme, which provides a UNESCO Global Network on Water and Development Information for Arid Lands was established in 2004 to strengthen the global capacity for management of water resources in arid and semi-arid regions.