I think I'll deny all traffic totally and allow network access only for the one wallet in android
But above all, choose an approved wallet. Some scammers offer tempting airdrops for you to download a wallet, and as soon as you have an amount of cryptos they're interested in, they drain it; this is the sad story of the
Free Wallet scam, which you should absolutely avoid.
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https://bitcointalk.org/index.php?topic=1964190.0You may be interested in that article :
https://www.datavisor.com/wiki/fake-cryptocurrency-wallet-scams/What are fake crypto wallets?
A fake crypto wallet is a cryptocurrency wallet that is not intended to keep a user’s investments safe but instead gives fraudsters a secret backdoor to steal cryptocurrency directly.
To hold any kind of cryptocurrency, you need a virtual crypto wallet. These digital storage devices can be software programs, online apps/services, or physical devices. Wallets that remain constantly connected to the internet are called “hot wallets” and physical hardware wallets are called “cold wallets.”
Both hot and cold wallets can be faked, but the attack methods differ for each.