| Error | Solution | | :--- | :--- | | | Reinstall MTK VCOM drivers, use USB 2.0 port. | | STATUS_AUTHENTICATION_FAIL | Need "Auth Bypass" – Use mtkclient tool. | | Flashing stuck at 100% | Unplug USB, hold power 15s, reboot normally. | | No IMEI after flash | Use Maui Meta Tool or SN Writer to restore IMEI (requires backup). |
for this series. With Android 15 now active, this represents the final promised major OS update, though the newer Firmware INFINIX Note 40 Pro 5G
: Manually flashing firmware can void your warranty or brick your device if done incorrectly. Ensure you use the correct model-specific file (X6851). 🛠️ Advanced Troubleshooting | Error | Solution | | :--- |
Infinix Note 40 Pro 5G is currently operating on its second major software cycle as of April 2026 . Originally launched with Android 14 , the device has recently transitioned to Android 15 Official Firmware Status (April 2026) Operating System Android 15 (Latest rollout). Security Support : 36 months total (expected to continue until early 2027). Major Upgrades : Infinix committed to two major Android version upgrades | | No IMEI after flash | Use