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Unable to Activate iPhone

Updated: April 8, 2026

Activation ties the device to Apple’s servers and your SIM/eSIM. Failures show during setup or after a restore.

Try these in order

Force restart; try Wi-Fi vs cellular.
Remove and reinsert physical SIM; refresh eSIM if your carrier supports it.
Check Apple System Status for “iOS Device Activation.”
Restore again via Recovery mode if advised by support.

Do not confuse with Activation Lock (Apple ID lock). For tools, download i4Tools.