Use a real password
iPhone and Android both default to a 4-digit PIN for opening the telephone. That is OK the length of you don’t use something basic like 0000 or 1234. In any case, I know some individuals who need significantly more security.
To set a genuine password on an iPhone, go to Settings>>Passcode. From that point, swipe off the choice that says Simple Passcode. Here, you can set your passcode with letters and exceptional characters for better telephone security.
Go to Settings>>Lock screen and tap Screen lock. You can set what level of security you need, from a simple swipe to a password. Select Password and sort in the password that you need. It ought to have a blend of letters, numbers and exceptional characters to be truly sheltered.