Shift4 One & Duo

Update timeline

1. investigating Oct 25, 2026, 11:19 AM UTC

   Shift4 is investigating reports of degraded performance on our S4 Dine. We will provide updates as they become available. Thanks for your patience; we apologize for the inconvenience.

2. investigating Oct 25, 2026, 11:24 AM UTC

   We have determined that Shift4 One might be partially unavailable in the UK, Ireland & Portugal

3. investigating Oct 25, 2026, 12:09 PM UTC

   We are still actively investigating the issue that is affecting the UK, Ireland & Portugal and working on a permanent fix. In the meantime, we recommend manually changing the time zone back to +1 (UTC) as a temporary workaround. Other merchants can disregard this incident Once further feedback is available, we will let you know.

4. investigating Oct 25, 2026, 12:53 PM UTC

   As we are still investigating the issue that is affecting the UK, Ireland & Portugal for Shift4 One devices with the highest priority, we would like to note that, as a temporary workaround, please disable the toggles titled (Use Network Provided Time and Use Network Provided Timezone) and also change the timezone to +1 (UTC/Summertime) Merchants not in the mentioned countries can disregard this incident.

5. identified Oct 25, 2026, 01:16 PM UTC

   As we are still investigating the issue that is affecting the UK, Ireland & Portugal for Shift4 One & Shift4 Duo devices with the highest priority, we would like to note that, as a temporary workaround, please disable the toggles titled (Use Network Provided Time and Use Network Provided Timezone) and also change the timezone to +1 (UTC/Summertime) Merchants not in the mentioned countries can disregard this incident.

6. monitoring Oct 25, 2026, 01:46 PM UTC

   A fix has been implemented across UK, Ireland, and Portugal. We are monitoring the results.

7. monitoring Oct 25, 2026, 02:26 PM UTC

   We are aware of an issue affecting some Shift4 One and Duo devices that may cause the displayed time to be incorrect. Transactions will continue to process normally. What you need to know: 1. Please do not change the device timezone or other time settings. Changing these settings may prevent the device from processing transactions. 2. No action is required if your device is displaying the incorrect time. 3. The correct time will be restored automatically when the permanent update is deployed. Our team is actively working to resolve the display issue as quickly as possible. If you have already changed the time or time zone settings and your device is no longer processing transactions, please contact Shift4 Support for assistance. We apologize for the inconvenience and appreciate your patience while we work to resolve this issue.

8. monitoring Oct 26, 2026, 02:24 PM UTC

   We are aware of an issue affecting some Shift4 One and Duo devices that may cause the displayed time to be incorrect. Transactions will continue to process normally. What you need to know: 1. Please do not change the device timezone or other time settings. Changing these settings may prevent the device from processing transactions. 2. No action is required if your device is displaying the incorrect time. 3. The correct time will be restored automatically when the permanent update is deployed. Our team is actively working to resolve the display issue as quickly as possible. If you have already changed the time or time zone settings and your device is no longer processing transactions, please contact Shift4 Support for assistance. We apologize for the inconvenience and appreciate your patience while we work to resolve this issue.

9. monitoring Oct 26, 2026, 02:25 PM UTC

   We are aware of an issue affecting some Shift4 One and Duo devices that may cause the displayed time to be incorrect. Transactions will continue to process normally. What you need to know: 1. Please do not change the device timezone or other time settings. Changing these settings may prevent the device from processing transactions. 2. No action is required if your device is displaying the incorrect time. 3. The correct time will be restored automatically when the permanent update is deployed. Our team is actively working to resolve the display issue as quickly as possible. If you have already changed the time or time zone settings and your device is no longer processing transactions, please contact Shift4 Support for assistance. We apologize for the inconvenience and appreciate your patience while we work to resolve this issue.

10. resolved Oct 28, 2026, 03:39 PM UTC

    The incident has been resolved.