Always use 2FA: First, you should always use second-factor authentication (also known as “2FA” or “one-time password”) and a strong password to secure your email and iCloud accounts. Here are the guides to set up 2FA with Gmail, Yahoo Mail, Outlook, ProtonMail, Zoho and iCloud. 

No mobile phone number, ever: We strongly recommend avoiding using a mobile phone number as a second factor. Instead, use known authentication services (like Google authenticator on iOS or Android or Authy).

Always use device PIN/biometrics: You should always use a PIN or biometric security to protect your mobile device. Here is how to add a passcode, and here’s how to add biometrics (Touch ID and Face ID). Note that if you have an identical twin, both Apple and Google do not recommend the usage of Face ID and video biometrics.

Never share a password: As a rule, never share your device passwords with anyone and avoid using the same password for multiple accounts. 

Choose a password manager: Zengo does not require any password, but if you ever need to remember multiple passwords, we recommend avoiding using unprotected software (notes apps or text editors, for example) and using a password manager instead (for example 1password, LastPass, or Dashlane). 

Recovery options: You should also always make sure that your recovery options are set up for your email and iCloud account. Here is how to add this on Gmail, Yahoo Mail, Outlook, ProtonMail, Zoho, and iCloud.