From a security standpoint of an Android mobile wallet, if you were to use a firewall like NoRootFirewall and block all incoming & outgoing connections to your mobile wallets while having your phone connected to the internet all the time, would that help making the Android wallet sure? As nobody can get access to your wallet by hacking it that way, they won't be able to make any transactions from your wallet. Then if you to make a transfer out from your wallet, you open up NoRootFirewall and allow incoming & outgoing connections to & from your wallet program. Then you again block all access once finished.
Also, what network transaction fees should you modify for your wallet? For example, Coinomi has the default as 0.002BTC. Can this be lowered?
Anyone have any thoughts on this about Android mobile wallet security?