I appreciate you are just asking a question, but for this to be a serious consideration of yours then your threat model is wrong.
There are multiple ways you can have your wallet hacked and your coins stolen. At the top of that list is using a hot wallet, especially a hot wallet on a device which you use daily for other things, such as general internet use. The chance of such a device contracting malware which will access your wallet is high. Also at the top of that list is storing your seed phrase electronically, be that on your own device, in the cloud, in an email, or whatever. Anything stored online is at constant risk of hacks and theft.
Very far down that list of risks is a seed phrase backed up securely and completely offline on paper or metal being stolen. By not having an offline back up you are reducing the risk of theft by an minuscule amount, while greatly increasing the risk of loss should your device fail/malfunction/corrupt/be damaged, should you lose your device, should you forget your wallet's password, and so on.
Every wallet and every back up system is a trade off between security against theft and security against loss. The trade off of not having a single offline back up (very small reduction in risk of theft versus very large increase in risk of loss) is simply not worth it. If your particular threat model places a large emphasis on an offline back up being compromised, then the correct solution is to use either passphrases or multi-sig, and not to abandon offline back ups altogether.
Hey friend, hope you are good. the question came from a serious tough, I understood it will have down sides also.. but when I understood a phone can just break without reason I understand how stupid I did sound.
So far I have always backed up my wallets and will continue to do so in the future, the seed phrase will go onto a physical paper. But if I would do this.. I would not do it on a phone I am using daily it would be a phone that just laying home in my house.
If you never ask, you never know or learn. This forum have already learned me alot and will learn me alot more.
As an alternative, you can just backup your wallet data. That's how Bitcoin Core backups work: copy your wallet file to a USB stick, test it, and make another backup on a different brand stick. Then, just to be use, make a new copy on a new stick every year.
Thank you. I love to learning new things.
, will try this later.