The short answer
Calculate device balances, lost credits, remaining services, and final-bill timing before ending an account.
Step by step
Ask the carrier for a written account-close estimate that separates service charges, device payoff, and promotional credits.
Decide which numbers must be transferred and initiate those ports while the account remains active.
Move or cancel watches, tablets, home internet, insurance, and other connected services individually.
Return leased or carrier-owned equipment using a tracked method and keep the receipt.
Review the final bill and the following bank statement to confirm autopay stopped and no line remained active.
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.