Nile Field Notice: NFN-2026-05-19
Notice ID | NFN-2026-05-19 |
|---|---|
Date Issued | 19 May 2026 |
Priority Level | ⚠ CRITICAL |
Applies To | CSEs | PNEs | SDMs | SEs | Partners | Field Architects | Customers |
Applicable Nav App Version | Nile Nav 1.4.0 and onwards |
Summary
During recent site activations, two issues have been observed where Nile Nav is unable to establish or maintain a Bluetooth connection with the all Nile switches on certain mobile devices. The root cause in both cases is a mobile-OS-side Bluetooth behaviour on specific iOS and Android versions.
Issue 1 - Android 16: On mobile devices running Android 16, the Nile Nav app fails the activation attempt due to a Bluetooth incompatibility introduced in Android 16 making it currently incompatible with the Nile system. BLE package crash on Nile switches during activation when using Android 16 mobile devices
Issue 2 - iOS 26.3.1: On iPhones running iOS 26.3.1, Nile Nav cannot initiate a Bluetooth connection to the Nile switch. This is a known iOS 26.3.1 issue, already fixed by Apple in iOS 26.4.2.
Both issues affect Nile Nav activation & troubleshooting workflows during the Bluetooth pairing step and may prevent activation from starting or completing on affected devices.
Recommendation: Use mobile devices with different android version than Android 16. Upgrade to iOS versions 26.4.2 or later
Key Findings
Issue 1 - Android 16
- BLE connectivity failure observed on mobile devices using Android 16.
- So far not observed on other Android Versions.
- Root cause: BLE package crash on Nile switches during activation when using Android 16 mobile devices
Issue 2 - iOS 26.3.1
- Reproducible on iPhones running iOS 26.3.1.
- Not observed on iOS 26.4.2, 26.2.1, or earlier supported iOS versions.
- Root cause: a known iOS 26.3.1 Bluetooth issue, fixed by Apple in iOS 26.4.2.
- Confirmed resolved by upgrading the affected iPhone to iOS 26.4.2 and reinstalling Nile Nav.
Impact
These issues affect Nile Nav workflows requiring bluetooth interaction like activation & troubleshooting when using affected mobile devices. Specifically:
- Technicians using Android 16 phones may be unable to complete an activation.
- Technicians using iPhones on iOS 26.3.1 may be unable to start the Bluetooth pairing step in Nile Nav.
- Delays in first-time activations and additional troubleshooting time on-site.
- No impact to deployed, operational Nile networks - these issues are limited to the Nile Nav activation and on-site troubleshooting workflow.
Affected Platforms
Platform | Affected version / device | Issue |
|---|---|---|
iOS | iOS 26.3.1 | BLE connection does not initiate |
Android | Android 16 | BLE package crash on device |
Nile Firmware | All versions | Nav unable to communicate with the device |
Nile Hardware | Affects all Nile switches requiring BLE interaction with Nile Nav | Nav unable to communicate with the device |
Note: Issue affecting iOS models : iPhone 16 Pro Max, iPhone 17 Pro . Issue affecting Android models : Pixel 6A, Pixel 10 Pro XL, Samsung S26 Ultra. This list is indicative but not exhaustive
Actions Required / Workaround
To avoid encountering these issues, please follow the mandatory SOP below before starting any activation or on-site troubleshooting.
Step 1 - Check your mobile device
- Before starting any Nile Nav activation, identify your phone's OS and version ahead of time:
- Android - Settings → About phone → Android version
- iOS - Settings → General → About → iOS Version
Step 2 - Apply the correct path
If you are on Android 16: Do not proceed with Nile Nav activation using this device/version.
- Use a mobile device with a different android version until system fix is available
- If no alternative device is available, contact Nile Support before attempting activation.
If you are on iOS 26.3.1: Upgrade to iOS 26.4.2 before proceeding.
- Settings → General → Software Update → install iOS 26.4.2 (or later).
- After the iOS upgrade, delete and reinstall the Nile Nav app from the App Store.
- Retry the activation / troubleshooting
If you are on any other supported version, proceed as normal.
Troubleshooting Tips
If you encounter a suspected Bluetooth issue during activation:
- Confirm your mobile device's OS and version against the Affected Platforms table above.
- If on Android 16: stop and switch to a compatible device. Do not retry on the same Android 16 phone - a reboot of the Nile switch may be required to recover.
- If on iOS 26.3.1: upgrade iOS to 26.4.2 (or later), delete and reinstall Nile Nav, then retry the activation.
- When reporting any new occurrence to Nile Support, please share: mobile device model, mobile OS version, Nile Nav app version, and the Nile switch serial number.
Next Steps / Resolution Plan
Issue 1 - Android 16
- A system update is planned that will ensure Bluetooth pairing works reliably on Android 16 devices.
- Fix Versions: REL_25.2.1_HF_5, AP:25.2.1-H52, SW:25.2.1-H56
Issue 2 - iOS 26.3.1
- Resolved by Apple in iOS 26.4.2. No Nile update is required.
Contact / Escalation
Support email: [email protected]
For deployment-blocking situations, contact your Nile SDM directly.
Note: All partners and field teams are requested to adhere to the above SOP to prevent Nile Nav activation failures on affected mobile devices until fixed.