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After i restored the iphone, its shows this
Unable to activate, An Update is required to activate your iPhone
I restored the iphone, prior to it cant read the simcard (the phone keep searching for network) when the simcard is already installed
iPhone 12 Pro
Remove and reinsert the SIM card.
If it doesn't help contact your carrier, maybe the SIM card is damaged, ask for a replaced (new) card. Normally it is free.
Also ask to check if the SIM tray is bent, as even a tiny misalignment can cause the SIM card to not fully connect with the internal contacts in your iPhone.
If it doesn't help see these Apple articles below:
If you see No Service, Searching, or SOS on your iPhone or iPad
If you see No Service, Searching, or SOS on your iPhone or iPad - Apple Support
Manually update your carrier settings on your iPhone or iPad
Manually update your carrier settings on your iPhone or iPad - Apple Support
Update your network provider settings manually on your iPhone or iPad
Update your network provider settings manually on your iPhone or iPad – Apple Support (UK)
See also -> If you can't activate your iPhone or iPad (Wi-Fi + Cellular)
If you can't activate your iPhone or iPad (Wi-Fi + Cellular) - Apple Support
Unable to activate, An Update is required to activate your iPhone
