I don't play in PC with wi fi I mean I don't use any routers, I use my mobile data and play in phone. Should I send my phone's ip address to my friend?
If you are using a phone, you can play with your friend by opening a hotspot on your phone and ask your friends to connect to it. This should form a local area network (LAN) and allow connection between the devices. I don't think you even need to enable data for LAN connection to work.
Of course your friend must be 8n the range of your hotspot
If you can host a hotspot it maybe works, but you cannot port forward on mobile data. Instead you can join the Discord to find a list of servers.