I've read that there are 2 types of IPv4 addresses: public ip-address and private ip-address.
Public ip is used to connect devices to the internet (WAN). There's always an example about routers that have that type of ip and provide access to the internet.
Private ip is used to connect devices between each other in LAN. It's internal ip. And there's always an example on the internet about devices that belong to the internal network.
That's quite understable, but what about other devices that have access to the internet without router? Mobile web. Is there some big router that provides our devices public ip addresses? I mean, router that belongs to mobile internet provider.