The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
Unknown error code 4000. Cellular update failed. How can this be fixed? I have up to date iTunes. I have backed up my phone. After several attempts, power cycling both laptop and iPhone, and a couple backflips I still haven’t got this resolved.
Try this please --> This user has posted a method through which error 4000 can be resolved.
Unknown error code 4000
