I’m currently in Mozambique and one of the ISPs (called Vodacom) here has a service related to WhatsApp where you can send and receive WhatsApp messages free of charge. The only thing you can’t see is media (as in you can receive a picture or a video or an audio but you can’t download it)
I started thinking about how that would be possible, how is it that they can tell what content is in the message (if it’s encrypted) for them to stop you from downloading the media.
I should mention that there’s another ISP (called Movitel ) that offers the exact same service and you can download media, as long as it’s under a certain size