This could be so hilarious but I just need you to contribute.
If someone has two mobile phones, deciding to use one as a mobile wallet. To me, this is a good idea as one of the phones can be useless. And having in mind to use it as wallet and putting these in consideration.
Having back up of his private keys or seed phrase.
Not using it to go online but online while making transactions
Still install anti malware against malware
So, he use the phone only as wallet and for crypto transactions. So, what do you think. Is this a good idea?
If I were you, it's better to invest in a hardware wallet to store your assets. It's a lesson I've learned so hard after my 3 Metamask/Trust Wallet accounts have been hacked due to the malware that I didn't know and it was a costly mistake in my part for felling off in the hacker's antics.
Right now when I do transactions using my Metamask or Trust Wallet, I only left a few dollars for each blockchain (e.g, Binance Smart Chain, Polygon, etc.) for gas fee payments, buying certain tokens in private or presale campaigns or minting NFTs.