Two-factor authentication (2FA) is the single biggest security upgrade you can make in 10 minutes. But not all 2FA is equal. Below is the actual hierarchy.
The three types of 2FA
SMS codes (worst). The bank texts you a code. Easy to set up, easy to phish, vulnerable to SIM swap attacks. Still better than no 2FA.
Authenticator apps (good). An app like Google Authenticator or Authy generates a 6-digit code that changes every 30 seconds. Works without internet. Cannot be SIM-swapped.
Hardware keys (best). A physical USB device (YubiKey is the most popular). The most phishing-proof option. Cost: PKR 5,000–10,000.
What to enable, in order
Step 1: Enable authenticator-app 2FA on your primary email. This is the most important account because every other account flows through it.
Step 2: Enable on your primary bank.
Step 3: Enable on social media (Facebook, Instagram).
Step 4: Enable on any account that stores payment info (Amazon, Daraz, Uber).
Pick one authenticator app
For Pakistan-based users we recommend Authy over Google Authenticator because Authy backs up your codes to the cloud (encrypted). If you lose your phone with Google Authenticator, you lose access to every 2FA-protected account.
Print your recovery codes
Every site that supports 2FA gives you "recovery codes" — 8-10 single-use codes for emergencies. Print them. Store them somewhere physical — not in a Google Doc, not in WhatsApp.
What 2FA does NOT protect against
If you click a phishing link, type your password AND the 2FA code into the fake site, the attacker can use both. The only 2FA method that prevents this is hardware keys (the key refuses to fire on a wrong domain).