What kind of scam is Apple's mobile phone not supporting 2g3g?

It means that some criminals claim that Apple phones have stopped supporting 2G/3G networks and need to be upgraded to 4G or 5G networks by sending false information or phone calls to trick users into buying new phones or upgrading mobile phone packages. The purpose of this scam is to make users spend more money to buy new mobile phones or upgrade their mobile phone packages, so as to obtain illegal benefits.