AP article: https://apnews.com/article/un-general-assembly-israel-netany...

> It was not immediately clear if that happened, or to what extent. AP journalists inside Gaza saw no immediate evidence of Netanyahu’s speech being broadcast on phones there.

This is an official AP twitter account. There are no news stores I can find yet. I shorted the title from:

"JERUSALEM (AP) — In 'unprecedented operation,' Israeli army takes over mobile phones of Gaza residents to carry Netanyahu UN speech live."