Fix: END_OF_NT_EVALUATION_PERIOD Error on the Lumia 1320

The Lumia 1320 is, by all means, an amazing smartphone. Its impressive 6” screen and above-average technical specifications make it a crowd-pleasing Windows Phone. Earlier this year, the Lumia 1320 was updated from Lumia Cyan to Lumia Denim. However, Microsoft has a bit of notoriety; even its most minor system updates are often unstable and, in some cases, they are not successfully installed on some devices. This proved to be the case with the Lumia Denim update, as the update failed to install on countless Lumia 1320s across the globe.

Many Lumia 1320 users have faced a problem that was as dreadful as it could possibly be – their devices would offer an update to Lumia Denim. However, the update would get stuck at any point, most commonly at 0%, and the error message “END_OF_NT_EVALUATION_PERIOD” would display. Subsequently, the device would fail to boot. The Lumia Denim update has turned a significant number of Lumia 1320s around the world into nothing more than highly expensive paperweights.

The only way for affected users to get their Lumia 1320 to even boot up was for them to use the Lumia Software Recovery Tool to restore their device to Lumia Cyan. From here, another attempt to update an affected Lumia 1320 to Lumia Denim would once again result in the END_OF_NT_EVALUATION_PERIOD error, putting the device into an endless loop of going back to Lumia Cyan, receiving a Lumia Denim update and displaying the END_OF_NT_EVALUATION_PERIOD error during the update.

Fortunately for you, if you are suffering from the END_OF_NT_EVALUATION_PERIOD system update error, there is a way to get your Lumia 1320 out of the seemingly endless loop and successfully upgrade it to Lumia Denim. To fix the END_OF_NT_EVALUATION_PERIOD system update error, you simply have to:

Switch off the Lumia 1320. Remove the SIM card and MicroSD card from the device.

If you haven’t already restored the device to Lumia Cyan, then do so using the Lumia Software Recovery Tool. To restore your Lumia 1320 to Lumia Cyan using the Recovery Tool, first, download and install the tool. Next, open the Recovery Tool and click on “my phone does not start up or respond”. Disconnect any and all other phones connected to your computer, then click on “Continue”. Connect your Lumia 1320 to the computer and wait for the Recovery Tool to recognize it. If your Lumia 1320 is not recognized by the tool, press and hold the Power and Volume Down buttons until the device vibrates. Once your Lumia 1320 has been recognized by the Recovery Tool, follow the on-screen instructions. Download the required files and flash them to your Lumia 1320 to revert it to Lumia Cyan.

Switch on the Lumia 1320,

If you restored the phone to Lumia Cyan in Step 3, then set up your Lumia 1320. However, remember to connect it only to a WiFi network and avoid adding your Microsoft account.

Download and install the update over the air.

After the update is successfully downloaded and installed, you can turn off your Lumia 1320 and reinsert the SIM card and MicroSD card.


Kevin Arrows

Kevin Arrows is a highly experienced and knowledgeable technology specialist with over a decade of industry experience. He holds a Microsoft Certified Technology Specialist (MCTS) certification and has a deep passion for staying up-to-date on the latest tech developments. Kevin has written extensively on a wide range of tech-related topics, showcasing his expertise and knowledge in areas such as software development, cybersecurity, and cloud computing. His contributions to the tech field have been widely recognized and respected by his peers, and he is highly regarded for his ability to explain complex technical concepts in a clear and concise manner.