Could Not Activate my iphone4
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If you can't activate your iPhone - Apple Support - https://support.apple.com/HT201407 - "If your iPhone can't be activated or an alert says the activation server is unavailable or the SIM card is unsupported, learn what to do."
It appears you have no SIM card installed and you will need to contact a local carrier about getting one.
Read the Apple Recommended post at the top of this (and every) thread page.
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I can’t activate my iPhone . Could not activate iPhone