how to protect my cell from hackers

https://tech.hindustantimes.com/how-to/here-are-three-easy-ways-to-keep-your-private-whatsapp-chats-secure-71602156812021.html how important is it for you to protect your cell phone how secure is your password have you tried the double authentication on your whatsp how do you use your cell phone ? Do you use it for personal interaction or do you use it for work or study ? What would You do if you lost it or if it was stolen ? Are you afraid of hackers? Do you have your banking information on your cell ? Have you ever found somebody else s phone What did you do ?