Kyivstar PJSC, Ukraine’s largest mobile operator, signed a deal with Elon Musk’s Starlink to introduce satellite-powered cellular service in the war-torn country in a bid to place telecom infrastructure beyond the reach of Russian attacks.The deal will allow Kyivstar customers to use space-based connectivity when the terrestrial network is unable to service an area, the Ukrainian company said in a statement on Monday. Kyivstar expects to offer text messaging using the technology in the fourth qu...