NRK had a series on puberty that is no-nonsense, straight to the point. It was hosted by a physician. Most of it is on YouTube, and from a very brief look has English subtitles. Warning, it contains full frontal nudity of people at various ages. It is rated for children in Norway, but might be shocking to someone not used to seeing nipples on TV. It should be quite informative. Watch it yourself and decide if you want your son to see it. I have no idea if it is geoblocked.

[…] nobody uses SIP…

Say what?

In my part of the world signaling for literally every phone call, be it mobile or fixed, traverses networks and operators using SIP.

Had to scroll way too far for this.

Username checks out…

In my last two phones I have used eSIM, but I still have 6 of these in a neat row on a magnet above my desk.

No doubt an unpopular opinion, but I’d rather keep the IP rating than be able to swap my own battery without the phone becoming a literal brick.

I doubt this is a scenario where we can have both.