Google On 404 Errors And Search Console Validation Fix John Mueller answers questions about validating fixes for 404 errors and whether it's worth fixing external 404 links ...

To fix the issue, you’ll need to troubleshoot the SIM card itself, your phone’s software, and potentially network settings. Find the potential remedies for your “No SIM card” issue below.

The No SIM card detected error happens due to displaced card position, software issue, or SIM network issue. Considering the different causes of the error, here are ...

Google's John Mueller explains when it's useful to fix 404 errors from inbound links and when it's a waste of time ...