A Firewall should control all incoming connection requests and block untrusted requests. This protects your device from Malware. This is also important on smartphones, as many users store sensitive data here that may not be viewed by third parties
Does android have a firewall
The operating system Android does not offer a preinstalled Firewall, but uses some functions that together fulfill the tasks of a Firewall. This includes, for example, the counter that lists the data volume used for WLAN and mobile data. For suspicious Apps, Android also asks you to allow access to the data usage manually. Unwanted requests are blocked to protect you from malicious software.
Is this protection sufficient or is another Firewall useful? In general, it can be said that the Android functions offer good protection through regular security updates. If you still want to feel more secure, you can also install a Firewall.
Does android have a firewall, You can use these Firewalls for Android
NetGuard: This free Firewall is based on an Open-Source program. You will see in the App a list of all the applications that access the Internet and can set permissions manually.
Noroot Firewall: with this free app you get more settings options. Individual settings for mobile data and WLAN can also be made here.