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Phones & Tablets

How do I fix no service after switching from Verizon to T-Mobile?

Answer

After a Verizon-to-T-Mobile number transfer, toggle Airplane Mode, restart the phone, and confirm the T-Mobile line is enabled in Cellular or SIM settings. If service is still missing, verify the Verizon port-out details (account number, Number Transfer PIN, and Number Lock status) with T-Mobile.

Before you start: stop right away if…

  • Reset Network Settings removes saved Wi‑Fi passwords; only use it after simpler steps fail.

Follow these steps

  1. Toggle Airplane Mode

    Turn Airplane Mode on for 30 seconds, then turn it off and wait for the phone to reconnect to mobile networks.

    You should see: Signal returns, or No Service remains after the radio refresh.

  2. Restart the phone

    Restart the phone completely, unlock it, and check whether T-Mobile signal appears in the status bar.

    You should see: The phone finishes boot with updated carrier settings or still shows No Service.

  3. Enable the T-Mobile line on iPhone

    If you use iPhone, go to Settings > Cellular (or Mobile Data) and make sure the T-Mobile line is turned on and selected for cellular data and calls as needed.

    You should see: The T-Mobile line shows as enabled for voice and data.

  4. Enable the T-Mobile line on Android

    If you use Android, go to Settings > Connections > SIM manager (wording varies) and make sure the T-Mobile SIM or eSIM is turned on and set as preferred for calls and texts.

    You should see: The T-Mobile line is active in SIM manager.

  5. Confirm Verizon port-out details

    If service is still down, confirm with Verizon and T-Mobile that the port-out details were correct: Verizon account number, Number Transfer PIN, and that Number Lock was disabled before the transfer. Ask T-Mobile to recheck the port status.

    You should see: The port shows complete, or support identifies the missing transfer detail to correct.

  6. Reset network settings only if needed

    As a later step, use the phone’s Reset Network Settings option, confirm, then restart. You will need to rejoin Wi‑Fi networks afterward.

    You should see: Carrier connection settings refresh and T-Mobile service appears, or support is still needed for the unfinished port.

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Extra tips

What to look for: A No Service status, whether the T-Mobile SIM or eSIM is on, and whether Verizon Number Lock was turned off before the transfer.

Before you change anything: Have the Verizon account number and Number Transfer PIN ready if the port is still pending. Avoid a factory reset until simpler network steps fail. Confirm you are talking to official T-Mobile or Verizon support channels. Never share account PINs with unexpected callers.

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