Delete your Ad ID
On Android: Settings > Privacy > Ads > Delete advertising ID
iOS: Settings > Privacy & Security > Tracking > Allow Apps to Request To Track
Keep Your Phone up to Date
On Android, Google Play > your profile picture > Settings > Network Preferences > Auto-update apps > choose an auto update option
Also on Android, go to System > Software Update > Software Updates to make sure your Android versions are up to date.
On iOS, Settings > General > Software Updates > Turn on automatic updates
Facebook:
Private your socials
Instagram: Settings > Account Privacy > Private account
Facebook:
Settings > Privacy Center
Audience Settings
Profile Information > 'Only Me' or 'Friends'
Posts > 'Friends'
Review tags before they appear on your profile > 'On'
Ad Preferences > Manage in Account Center
Categories used to reach you > 'off'
Activity information from ad partners > 'Review Setting' > 'No, don’t make my ads more relevant by using this information'
'Ads from ad partners in other apps' > 'Don’t show me ads from ad partners'
Social Interactions > 'Select an account' > 'Only Me'
Twitter:
'...' icon > 'Settings and Privacy > 'Privacy and Safety' > 'Audience and tagging' > 'Protect your posts'
Vet who is following you
On all of those now private social media accounts, spend some time going through that list and ask yourself
Do I really know this person?
Do I know that this account is actually tied to the person I think it is?
Does this person need to have access to everything about me?
Use a password manager
Use Bitwarden, LastPass, ProtonPass to store your passwords.
Bitwarden is free for personal use.
Turn on MFA (or 2FA) on your accounts
Use Google Authenticator or another authenticator app when logging into accounts.
Avoid using SMS authentication when possible, as it is significantly less secure than an authentication app. There are several approaches to gaining codes sent through SMS such as SMS sniffing and SIM swapping.
Turn on device encryption
iOS and Android encrypt automatically if you have a pin set
Windows: settings > privacy & security > device encryption > on
Mac OS: search 'File Vault' > turn on
Turn off Biometrics
iOS:
Android:
Settings > Security & Privacy > Biometrics
Face Unlock > off
Fingerprint unlock > off
Set a 6 digit pin
Android: Settings > Security & Privacy > Lock screen > Screen lock > PIN > set a 6 digit pin
iOS: Settings > Face ID & Pin > Turn Passcode on (or Change Passcode) > custom numeric pin > set a 6 digit pin
Remove EXIF data from shared pictures
Manual: Screenshot a picture before sharing it
Android: Settings > Location > App Location Permissions > Camera: Set the location to not allowed.
Apple permissions: Go to Settings > Privacy & Security > Location Services > Camera, then tap Never.
NOTE: only screenshotting (or using an exif removal app like https://www.exifdata.com/) remove what kind of camera took the picture, which can be used for finger printing
Check haveibeenpwned.com
https://haveibeenpwned.com/ > put in your email > change the passwords for any site that has come up > sign up for notifications
Use an Ad Blocker/Privacy Badger
Other Resources
Stuff to add? email jt@yet.earth