What is Error Code (-12158)?

If you’ve encountered the iPhone error code (-12158), it can be a frustrating experience. This guide provides an in-depth look at what this error is, why it may occur, and detailed solutions to resolve it. Error code (-12158) on an iPhone typically indicates a problem related to network connections or security protocols, particularly when accessing specific services or applications. This error can occur due to issues with SSL (Secure Sockets Layer) configuration, which ensures secure connections between your mobile device and internet servers. The exact text of the error states: “Operation could not be completed. An unknown error occurred (-12158)”. In most cases, it appears, when users try to connect their iPhone to TV via lightning to HDMI cable and watch movies, videos or streams purchased on iPhone on TV.

iPhone error code (-12158)

Common Causes of Error Code (-12158)

  • Incorrect Date and Time Settings: SSL certificates rely on accurate system timestamps to validate secure connections.
  • Network Restrictions: Some networks, especially corporate or public Wi-Fi, may have restrictions that block certain types of data transmissions.
  • Outdated Software: Running an outdated version of iOS can lead to compatibility issues with modern security standards.
  • VPN or Proxy Interferences: Using VPNs or proxies might alter or interfere with secure connection setups necessary for application functioning.

Download repair tool

Sometimes resolving the errors is out of our control and possibilities. This is where third-party tools are more than welcome to contribute and carry all the difficulties away. If you are facing error -12158 or similar issues, but fail to benefit from any of the manual steps below, try using Tenorshare ReiBoot — a great recovery tool designed for resolving errors like that. Get to know how one can use it to address the errors and restore or update an iOS device successfully on their website.

Download iOS Repair Tool
  1. Download and install ReiBoot for either Mac or Windows.
  2. Once done, open the app and plug your device into the computer.
  3. The program should recognize your device and offer a couple of options.
  4. Choose Standard if you simply want to update your device, or Deep repair if you want to fully restore it.
  5. Then, download the firmware found by the app for your smartphone by clicking Download.
  6. Once the process is finished, click Repair now to start resolving the problems.
  7. Standard is meant to search for basic issues and bugs to address them without wiping out your data.
    Deep repair will reset your device to factory settings and delete the entire data stored on it.

  8. Wait until the app finishes its repair and restores your device. It will take about 15 minutes to end.

Step-by-Step Instructions to Fix Error Code (-12158)

Here are several methods to troubleshoot and potentially fix the error code (-12158) on your iPhone:

Method 1: Check Your Date and Time Settings

  1. Open the Settings app on your iPhone.
  2. Tap on General.
  3. Select Date & Time.
  4. Ensure that Set Automatically is enabled. This will correct any discrepancies in date and time that could affect SSL connections.

Method 2: Reset Network Settings

  1. Navigate to Settings > General > Reset.
  2. Tap Reset Network Settings.
  3. Enter your passcode if prompted and confirm the reset.

This will clear all network settings, returning them to factory defaults, and may resolve the issue if it’s related to network configurations.

Method 3: Update iOS

  1. Go to Settings > General > Software Update.
  2. If an update is available, tap Download and Install.
  3. Follow the on-screen instructions to complete the update.

Keeping your device updated ensures compatibility with newer security protocols and can fix bugs causing the error.

Method 4: Disable VPNs or Proxies

If you’re using a VPN or a proxy, consider disabling it to check if it resolves the issue.

  1. You can disable VPN settings from Settings > VPN.
  2. Turn off any proxy settings from Settings > Wi-Fi, select your network, and then tap the i icon next to it. Scroll down to the HTTP Proxy section and set it to Off.

Method 5: Restore iPhone as New

  1. Backup your iPhone data using iCloud or iTunes.
  2. Go to Settings > General > Reset.
  3. Select Erase All Content and Settings.
  4. After the device has been erased, set it up as a new device.

This is a last resort method as it erases all data on the device. It can be effective if all other methods fail.


Error code (-12158) on an iPhone is typically associated with network or SSL configuration issues. By following the above steps, you can address most of the common triggers for this error. If the problem persists after trying these solutions, contacting Apple Support for further assistance is advisable. They can provide additional diagnostics and support to resolve the issue.

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James Kramer
Hello, I'm James. My website Bugsfighter.com, a culmination of a decade's journey in the realms of computer troubleshooting, software testing, and development. My mission here is to offer you comprehensive, yet user-friendly guides across a spectrum of topics in this niche. Should you encounter any challenges with the software or the methodologies I endorse, please know that I am readily accessible for assistance. For any inquiries or further communication, feel free to reach out through the 'Contacts' page. Your journey towards seamless computing starts here