Advisably, our public mobile should not contain our crypto wallets for security reason. Get yourself a portable mobile that will contain just your sim and SD card for communication purposes while you carry out your crypto related activities at home or a very private place with a separate phone. By so doing, even if you accidentally attacked you can not be forced to make any withdrawal since nothing related with crypto will not found in the portable phone.
The best approach is to have both. You must have some bitcoin in a hot wallet because eventually you 'll need to pay. But your holdings should be well hidden, in a wallet that has never seen the internet.
For me, I always advise people to have very minimal devices, with as less apps installed as possible. I like to keep my desktop clean, my laptop clean and my phone clean. Occasionally, I perform factory resets on my devices and I am ok with it. All sensitive data stay away from the internet, just to eliminate one point of failure. There are still other points of failure, but I do the best I can to have as less as possible.