
Many users have found themselves unable to activate their iPhones after restoring or resetting them due to an invalid SIM card notification.
1. Urgent: Do not restore your iPhone right now, unless you want it to become a paperweight.
After restoring or resetting an iPhone, numerous users have encountered activation problems due to an invalid SIM card notification.
In recent days, on the social media platform Facebook, netizens have been passing along a warning about not restoring iPhones. According to reports, many users, after performing a restore or reset (Reset All Settings) on their iPhones, have been unable to activate them due to an invalid SIM card notification. Despite trying various troubleshooting methods such as replacing the SIM card and reinstalling the operating system, all efforts have failed. These iPhones have now become 'bricks' and are currently unusable.

After restoring or resetting their iPhones, many users have received notifications of an invalid SIM card.
It's worth noting that all iPhones experiencing issues are international versions. Typically, the invalid SIM error only appears on locked iPhones. At present, this problem has been identified as stemming from Apple's server malfunction, causing inconvenience for users during device activation. Additionally, some users have shared that affected iPhones can only continue to be used by using a SIM interposer and functioning as locked devices.

Absolutely refrain from restoring or resetting your iPhone at this time unless you want it to become a paperweight.
Therefore, while waiting for Apple to address this issue, it's crucial not to restore or reset your iPhone to avoid ending up in a laughable situation as mentioned above. In case you've unfortunately encountered this error, promptly bring your device to authorized Apple service centers in Vietnam for assistance.
