The short answer
Protect the account that controls your number, device financing, personal data, and number transfers.
Step by step
Create a unique password and a carrier PIN that cannot be guessed from birthdays, addresses, or phone numbers.
Enable the strongest multifactor option available and secure the connected email account separately.
Turn on number-transfer protection, SIM-change alerts, purchase authentication, and account-change notifications.
Review authorized users, recovery contacts, mailing addresses, and connected devices every few months.
Save recovery codes offline and contact the carrier immediately after an unexplained service loss or account alert.
Before you finish
Keep screenshots, receipts, chat transcripts, confirmation numbers, and the first bill after a change. Carrier terms and account eligibility can change, so verify the final price and conditions directly before submitting an order.