DWR-921 C3 and modem BM806U-E1 firmware

Installing and Using OpenWrt
1

Hi guys.

  1. Can you OTA update embedded modem firmware from openWRT?? If so how is this possible. The 4G LTE modem of DWR-921 C3, BM806U-E1 came with firmware M1.2.0_E1.0.1_A1.1.8 but newest DWR-921 C3 came with M1.4.4_E1.0.3_A1.1.8.

  2. I made a mistake and flashed my european DWR-921 C3 firmware 1.xx.019 ww with the Russian firmware 4.02. in order to test EP06-E LTE module which failed to work.

Now I can not go back to European firmware.
Any ideas how to update DWR-921 C3 firmware back to original in order to install openWRT again as I want to replace the LTE module BM806U-E1 with EP06-E.

2

seems there is no way without risk. Will stay as is. Thanks for the replies. :slight_smile: