Thuraya’s Sat Sleeve: Pricewise this offering sits about half way between Delorme’s InReach SE (http://www.theultralighthiker.com/the-poor-mans-satellite-phone/) and the Rolls Royce model, Iridium’s Extreme (https://www.iridium.com/products/details/iridiumextreme) It is also substantially lighter than both (178 grams inc battery) but has to be paired with your phone – which means of course both devices have to work though you can make an emergency call with it in stand-alone mode. However unlike the other two it does not have tracking or a SOS (PLB) function and there are areas of the globe where it does not work (New Zealand for example). Most places though, if you want a cheaper, lighter Sat Phone for most purposes it could be a good choice. http://www.thuraya.com/SatSleeve
See also: http://www.theultralighthiker.com/the-poor-mans-satellite-phone/