====== Install blue-merle and randomize IMEI on GL-E750 Mudi ======

The [[https://www.gl-inet.com/products/gl-e750/|GL-E750 Mudi]] is an LTE router. It's particularly interesting because of built-in featues like VPN and Tor support.

And with [[https://github.com/srlabs/blue-merle|blue-merle]] there exists an extension to change the routers IMEI number, which allows to re-use the router for providing anonymous internet.

===== Install blue-merle =====

  - Update the Mudi to latest firmware, at least 3.215.
  - Get SSH console access to the Mudi. See [[https://docs.gl-inet.com/en/3/tutorials/ssh/|upstream docs]] for details. It might be that you have to change your local SSH config for this to work. See the linked tutorial for details.
  - Update opkg package list:  <code>opkg update</code>
  - Download blue-merle installation package from Github:<code>curl -LO https://github.com/srlabs/blue-merle/releases/download/v1.0/blue-merle_1.0.0-1_mips_24kc.ipk</code>
  - Install blue-merle: <code>opkg install blue-merle*.ipk</code>
  - If the installation stops with //"Your MCU version has not been verified to work with blue-merle."//
    - Answer the question //"Would you like to update your MCU?"// with //"y"// and wait until the Mudi is shutdown.
    - Restart the Mudi.
    - Repeat the steps "Update opkg package list" and "Install blue-merle" from above.

===== Change IMEI =====

  - Login to your Mudi webinterface (http://192.168.8.1/) and see the current IMEI.
  - Login to your Mudi via SSH.
  - Start blue-merle: <code>blue-merle</code>
  - Follow the instructions. It's particularly important to change your location in between the SIM & IMEI change to protect against correlation matching.
  - Again login to your Mudi webinterface (http://192.168.8.1/) and see the changed IMEI.