How to Safely Sell an Old Phone Without Leaking Your Entire Life

A factory reset alone may not erase everything. Photos, messages, login tokens, and personal data can sometimes be recovered from a "wiped" phone. Before selling, sign out of every account, remove your SIM card and memory card, encrypt the device, and then factory reset it. The encryption step is crucial — it makes any residual data unreadable even if someone tries recovery tools.

After the reset, go through the initial setup as if you were a new user and verify nothing personal remains. Remove the phone from your cloud account's trusted devices list and deauthorize it from any two-factor authentication apps. Your old phone contains years of your life — treat selling it with the same care you would treat shredding sensitive documents.