Phone Error & Warning Library
Find out what a phone warning usually means, what to try first, what to avoid and when a carrier or manufacturer may need to help.
SIM Not Supported
The phone is rejecting the installed SIM or eSIM, often because of a carrier restriction or incompatible activation.
Explain this message →Invalid SIM
The phone or network cannot accept the current SIM credentials.
Explain this message →No SIM
The phone is not detecting an active physical SIM or eSIM line.
Explain this message →SOS Only
The iPhone is not registered for normal service but may still reach emergency networks.
Explain this message →Emergency Calls Only
The phone has limited network access and is not registered for normal service.
Explain this message →No Service
The phone cannot register with its carrier for normal cellular service.
Explain this message →PUK Locked
The SIM requires a carrier-issued PUK after too many incorrect SIM PIN entries.
Explain this message →Moisture Detected
The phone has disabled wired charging because it detected moisture or conductive debris near the port.
Explain this message →Charging Paused
Charging has stopped temporarily, commonly because of temperature, moisture or an enabled battery-protection feature.
Explain this message →Temperature Warning
The phone is outside its safe operating-temperature range.
Explain this message →Unable to Activate
The phone or cellular line could not complete activation.
Explain this message →iMessage Waiting for Activation
Apple's messaging service has not completed activation for the selected phone number or account.
Explain this message →Storage Full
The phone has too little free storage for normal operation, updates or new files.
Explain this message →Update Failed
The phone could not download, verify or install a software update.
Explain this message →Camera Failed
The camera app or camera hardware could not initialize normally.
Explain this message →Mobile Network Unavailable
The phone cannot reach or register on an eligible mobile network.
Explain this message →