Does Android block all new incoming connections on public LTE?

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static25

Member
Nov 9, 2015
6
0
Hello,

I've just received public, static IP from my mobile provider.
I'd like my mobile phone to have all ports closed and block all new incoming connections.
So basically I need it to be invisible from the Internet.
I can't find any info about this topic.
I don't want to root it, so I don't have access to iptables/AFWall.

1) Does Android have any built-in firewall?
2) Does it have any ports open?
3) Does it block, by default, all new incoming connections?