Plan a wireless switch around the complete household bill, the lines that will move, and the date each obligation changes. Compare the cost of staying with the cost of switching over the same period, then budget separately for the cash needed at the start.
List every line and commitment
Open a recent bill and the account's device-payment and promotion details. For each phone, watch, tablet, or hotspot, record whether it will move, stay, or be canceled after the phone transfer is complete. Include the account owner and any family member whose permission or assistance is needed.
Ask the old provider for the price of the lines that will remain. A change in line count can alter the remaining bill. Also check bundled internet discounts, device protection, subscriptions, and payment arrangements. Keep a copy of the terms that apply to your actual account; the newest offer on a sales page may be different.
For example, Verizon's port-out guide tells customers to address remaining connected-device lines and device-payment balances. That illustrates why moving the last phone number does not by itself settle every subscription.
Separate recurring cost, exit cost, and cash timing
Ask both providers for the same comparison period, such as the next 12 months. Include the same devices and required features on both sides. Read the plan disclosure and offer terms together: the Broadband Facts label directory is one example of where a provider exposes base plan information separately from promotions.
Scroll sideways to read all columns.
| Component | What to include | Question to resolve |
|---|---|---|
| Service | All moving and remaining lines, required add-ons, taxes and fees. | What is the total with my exact line count and payment method? |
| Devices | Installments due during the comparison period or accelerated payoff on leaving. | When is the balance due, and which credits stop? |
| Transition | Activation charges, unavoidable service overlap, and applicable contract or return fees. | Which charges are refundable, waived, or payable regardless? |
| Promotions | Only credits or reimbursements whose conditions you can meet. | What proof, deadline, plan, trade-in, and waiting period apply? |
AT&T's cancellation guidance says the remaining installment balance becomes due when the associated line is canceled, and describes its full-billing-period policy for mid-period cancellation. Check your provider's terms before assuming a prorated refund. Ask how a port affects the cancellation date.
A promotion described as a free phone may apply credits over time. Review how many installments and credits remain, what happens on early departure, and whether any discount repayment is triggered. AT&T's bill-credit explanation distinguishes one-time credits from monthly device discounts. Treat a future reimbursement as conditional until the eligibility, evidence, submission, and timing requirements are clear.
Worked example: monthly savings and upfront cash
Download the switch-cost worksheet (plain text) to build both totals. Use the same period and avoid counting device principal twice or subtracting a credit already included in a quoted price. If the comparison ends before the old installments would finish, record the balance remaining under each option as well.
Schedule the switch around readiness
- Choose suitable service. Complete the coverage and provider checks before trading reliable service for a lower advertised price.
- Check the number and device. Obtain eligibility and compatibility confirmation, resolve carrier unlocking, and have the receiving SIM/eSIM instructions ready.
- Save records. Retain bills, device balances, promotion terms, needed voicemail, and approved account recovery options independent of the moving number.
- Prepare authorization near the transfer. Use the account-details guide; involve the authorized account holder and specify the exact lines.
- Let the receiving provider initiate the port. Keep the old line active, retain the case reference, and leave time to resolve a rejection. A billing-cycle target is useful only if it leaves a realistic transfer window.
- Verify the working number. Test incoming and outgoing calls, carrier texts, messaging registration, and voicemail before treating the transfer as finished.
A device return deadline and a number-transfer schedule may run independently. If you decide to reverse a switch, ask the providers how to preserve the number before canceling its current service. Do not assume returning a phone automatically moves the number back.
Finish with an account review
Inspect the old account after the port. Confirm which lines closed, which remain, the final amount due, and how you will receive the final statement. Cancel only the remaining services you intend to end, through their proper processes. Keep the confirmation and access needed to resolve a billing question.
Review the first new bills against the written offer. Check activation charges, line count, payment discounts, device installments, and the expected schedule for credits. Submit reimbursement evidence within the documented window and retain confirmation. A successful port completes the number move; this bill review completes the financial side of the switch.
Return to Number Portability guides and the transfer checklist.