How do I move a second iPhone from AT&T to Verizon service?
Answer
Activate the second iPhone on the Verizon account first, then port or cancel the AT&T line through official carrier channels. Keep Wi-Fi available for eSIM setup and finish number transfer before the old AT&T line fully closes if you are keeping that number.
Before you start: stop right away if…
- Canceling AT&T too early can interrupt a number port still in progress.
- Only share account PINs on official carrier sites or apps, never with unexpected callers.
Follow these steps
Start Verizon activation for the second iPhone
In the Verizon account or store activation flow, add a line or transfer service to the second iPhone's IMEI/eSIM and follow the on-screen install plan steps over Wi-Fi.
You should see: Verizon shows the second device as activating or active.
Port the AT&T number if you are keeping it
Provide AT&T account number, PIN, and billing ZIP when Verizon asks for port details, then wait until both carriers show the transfer in progress or complete.
You should see: Port status moves forward and the number begins working on Verizon.
Disconnect leftover AT&T service
After Verizon service works on the second iPhone, cancel any remaining AT&T line you no longer need from the official AT&T account, confirming the number handling one last time.
You should see: AT&T service for that phone ends without stranding a number you still need.
Test calls on both iPhones
Place and receive a call on each iPhone, and confirm the correct carrier name appears in Settings > Cellular.
You should see: Both iPhones have working Verizon service.
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Extra tips
What to look for: One iPhone online on Verizon, the second still on AT&T or Emergency calls only, and any port-in status in the Verizon account.
Before you change anything: Have both iPhone IMEIs and the AT&T account number and PIN ready. Stay on Wi-Fi for eSIM install. Do not cancel AT&T before Verizon confirms the port if you need that number. Back up each iPhone before service changes.