The best option is never to store your cryptocurrency in your mobile, the security is not that great if you are storing decent amount of money as you never know which application you installed is spying on your mobile and then there are documented hacks in the form of SIM swapping in the past and hence it is not the best option anyway to store anything sensitive in your mobile.
My rule on this is if you're storing more than double the cost of a safer setup (airgapping/hardware wallet etc) then you should splurge on the setup, you'll regret more when you lose it what you couldn't save.
Mobile wallets are alright for small day to day transactions like desktop wallets but shouldn't be relied upon for huge amounts (even if it's possible to store them on there relatively safely)...