Quick Summary
The error code "NSURLErrorDomain -1001" on an iPhone indicates a timeout issue when trying to connect to a server. This usually means the iPhone was unable to establish a connection with the server in a reasonable amount of time.
Common Causes
- Poor or Unstable Network Connection: The iPhone may be experiencing a weak Wi-Fi signal or intermittent cellular data connectivity, causing it to fail to communicate with the server before the connection times out.
- Server Unavailability or Overload: The server the iPhone is trying to reach might be temporarily unavailable due to maintenance, high traffic, or technical issues on the server side.
- Firewall or Network Restrictions: A firewall or network security setting may be blocking the iPhone's access to the server, leading to a connection timeout.
- Incorrect Date & Time Settings: Incorrect date and time settings can cause SSL/TLS verification failures, leading to connection timeouts as secure communication cannot be established.
- Outdated App Version: An outdated app version may have bugs or incompatibilities that cause connection timeouts. Updating to the latest version can resolve these issues.
Step-by-Step Fixes
Method 1: Verify Network Connection
Step 1: Ensure your iPhone is connected to a stable Wi-Fi network or has a strong cellular data signal. Try opening a webpage in Safari to confirm connectivity.
Step 2: If on Wi-Fi, try restarting your router or connecting to a different Wi-Fi network to rule out network-related issues.
Step 3: Disable and re-enable cellular data to refresh the connection.
Method 2: Check Date & Time Settings
Step 1: Go to 'Settings' > 'General' > 'Date & Time'.
Step 2: Enable 'Set Automatically'. If it's already enabled, toggle it off and on again.
Step 3: Verify that the date and time are correct. If they are not automatically updating, manually set them to the correct values.
Method 3: Restart the Application
Step 1: Close the application completely by swiping up from the bottom of the screen (or double-pressing the Home Button on older models) to reveal the app switcher.
Step 2: Swipe the app's preview card upwards to close it.
Step 3: Re-open the application and try again.
Method 4: Update the Application
Step 1: Open the App Store app.
Step 2: Tap on your profile icon in the upper right corner.
Step 3: Scroll down to the 'Available Updates' section. If the app you're using appears in the list, tap 'Update' next to it.
Step 4: Alternatively, use the search in the app store to check if the app is correctly installed.
Method 5: Reset Network Settings
Step 1: Go to 'Settings' > 'General' > 'Transfer or Reset iPhone'.
Step 2: Tap 'Reset' > 'Reset Network Settings'.
Step 3: Enter your passcode if prompted. Note that this will erase all saved Wi-Fi passwords, VPN settings, and cellular settings, so you'll need to re-enter them.