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Yet another OnePlus 5 firmware update rolls out with the network drops and 4G issue fix for the European region. The update is area specific and rolling out in Netherlands for now. Earlier, some of the users from the Netherlands reported of no 4G LTE network with the Vodafone NL. Other European customers also reported the same for Germany, Vodafone UK, etc. Today, the Oxygen OS 4.5.4 is reportedly rolling out in favor of the customers fixing the no 4G network for Netherlands.
No 4G_LTE on Vodafone NL network - OnePlus Forums

Earlier, the manufacturer released Oxygen OS 4.5.3 with several bug fixes and system optimizations. The bug fix includes camera app, system stability, Bluetooth, Wifi, and much more. Download the full firmware and OTA zip and restore device to stock.
OnePlus 5 Oxygen OS 4.5.4 OTA update network 4G fix

Download OnePlus 5 Oxygen OS 4.5.4

As the OOS 4.5.4 is region specific and fixes only network drops and 4G LTE issues in Netherlands and some parts of Europe, you will receive an OTA notification. So if your device is situated in the European region, then go to Settings – System updates – and check for updates.

  • Oxygen OS 4.5.4 OTA update | Download | File coming soon

Meanwhile, for a full firmware file, you may also try visiting the following URL. Copy and paste the link into your browser.

downloads.oneplus.net/oneplus-5/oneplus_5_oxygenos_4.5.4/

If you need a similar OTA update, thenĀ report to OnePlus from here.

In order to know how to install an update OnePlus 5, head over to this tutorial. You may also like to root OnePlus 5 on latest Oxygen OS or H2OS.