How do I fix an iPhone that shows No Service?
Answer
This usually means the phone is not registered with the carrier network. A full power cycle, a short Airplane Mode toggle, and checking for a carrier settings update often restore service.
Before you start: stop right away if…
- Do not share Apple ID passwords, recovery codes, or one-time codes with anyone who contacts you unexpectedly about phone service.
Follow these steps
Power-cycle the iPhone
Turn the iPhone completely off, wait about 60 seconds, then turn it back on and wait for it to finish connecting to the network.
You should see: The phone restarts and either regains service or still shows No Service for the next checks.
Toggle Airplane Mode
Open Control Center or Settings, turn Airplane Mode on for about 30 seconds, then turn it off and wait for the signal bars to return.
You should see: The phone re-registers with the carrier and No Service clears, or the status updates to Searching or a carrier name.
Check for a carrier settings update
Go to Settings > General > About and wait several seconds. If a carrier settings update prompt appears, install it.
You should see: Any available carrier update installs, or About finishes loading without a prompt.
Confirm the line and SIM or eSIM
Open Settings > Cellular and confirm the line is turned on. If you use a physical SIM, power off, reseat the SIM, and power on again.
You should see: The correct line shows as enabled and the phone attempts to reconnect.
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Extra tips
What to look for: A status bar or Cellular screen that says No Service, and whether Settings > General > About offers a carrier settings update.
Before you change anything: Confirm the phone is an iPhone and note the exact status shown (No Service, Searching, or SOS). Check that the SIM or eSIM line is still active with the carrier. Avoid a factory reset until simpler network steps fail. Never share your Apple ID password or one-time codes with unexpected callers.