I came across an interesting Reuters report from July 9, 2024, titled: How Hezbollah used pagers and couriers to counter Israel’s high tech surveillance (headline has shifted over last few weeks). I quote from the article:

Cell phones, which can be used to track a user’s location, have been banned from the battlefield in favour of more old-fashioned communication means, including pagers and couriers who deliver verbal messages in person, two of the sources said.