If some apps on a newly purchased used iPhone do not work and display unusual error messages, the device could be on an app developer blacklist. Apple offers developers the option of permanently excluding devices from using their apps – a feature that can become problematic when reusing used iPhones.
Used iPhones have a high resale value. This is due to the long-lasting hardware and the long support for software updates. This means that well-reconditioned devices can often be used for years. Apple itself also sells refurbished iPhones or issues them as replacement devices as part of Apple Care+. But a new problem is causing inconvenience for buyers of such devices.
Locked iPhones
A developer experienced recently had a surprise: After receiving a refurbished iPhone from an authorized service provider, he was unable to use Snapchat. The app refused to provide service with the error message “SS06”. After research, it turned out that the iPhone was on a Snapchat blacklist because the previous owner had misused the app. Snapchat refused to delete the entry and the user eventually received another replacement device.
The reason for this is the DeviceCheck Framework, which Apple has been offering since iOS 11. This allows developers to permanently mark devices to prevent repeated misuse or violations of the terms and conditions, for example. Such a marking remains even after the device has been reset.
Conclusion
When buying a used iPhone, there is a risk that certain apps will not work. Since you have no information about the previous owner, it is advisable to test important apps during the return period until Apple has resolved this issue.
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