Is it possible to create a wallet that has the same security offered by the mainstream hardware wallet like Trezor or Ledger Nano? Do I need another computer mainly for cryptocurrency only? I remember there is someone who said that this is possible, I just can't remember the post and the author.
Was it something like this?
/index.php?topic=5237614.msg54149363#msg54149363 <-for 2 Electrum mobile.
Take note: If you're planning on buying the second phone because you don't have a spare, then it's better off buying a hardware wallet instead.
Otherwise, the security is as good as a hardware wallet as long as the cold-storage is hidden, secured with a passphrase (
both phone and Electrum) and disabled mobile network, WiFi, Bluetooth, etc. connections.