This is the best summary I could come up with:

The Institute for the Study of War (ISW), a Washington, DC-based think tank, said in an assessment published on Thursday that Russian forces were reportedly using SIM cards from Kyivstar, the largest telecommunications operator in Ukraine, "to control Shahed drones" in Moscow's grinding war against Kyiv.

ISW cited a Ukrainian source that reported on Wednesday that "a downed Russian Shahed drone included a Kyivstar SIM card, which reportedly allows Russian forces to exploit the Kyivstar mobile network to track the drone's location and change its flight path."

Внутри найдена симка "Киевстара", предполагается, что она использовалась для передачи дрону команд во время полета https://t.co/XmVOZHhzks #RussianUkrainianWar pic.twitter.com/53fDhIXBCP

Last month, Russia launched its largest drone attack against Kyiv since the Kremlin invaded the Eastern European country in February 2022.

Ukraine's Ministry of Foreign Affairs said in a post on X at the time that the country's Armed Forces and Air Defense system shot down 71 out of 75 Shahed drones launched by Russia into Ukrainian territory on the night of November 25.

Mykhailo Shamanov, a spokesperson for the Kyiv city military, told CNN that the drone attack on the Ukrainian capital is the fourth from Russia in the last month.

The original article contains 317 words, the summary contains 197 words. Saved 38%. I'm a bot and I'm open source!