I lost my phone days ago and now I got a used phone, the problem is this phone is rooted, I hope this doesn't carry any danger to crypto related security? Either wallets or stuff? I am careful not to import my recovery seed on the phone first, not before having a answer, I've also reformatted the phone through recovery mode but root is still present. Any Danger?.
From what we know an android device(smartphone or tablet) is safer than a PC connected to internet on the whole. So IMO even rooted your smartphone is certainly safer than a random PC using a common OS. Bitcoin hasn't been made to be hoarded by dwarfs and dragons in a vault, but to be used by anybody to pay anything. Satoshi Nakamoto whoever he use to be, designed it to be a "Peer-to-Peer Electronic Cash System". So if I were you, I would only leave few mBTC on it but I would still use it. When you send your cryptos to an exchange, to a gambling site or to any platform, you face the same risk but nobody panics about that while the amount funds is usually way larger than what you need for a "daily" use.