I started trying out Karsten Nohl’s and Luca Melette’s GPRS sniffing tutorial (https://srlabs.de/gprs) and I found out that because of some changes that were made to the code the patch provided with the tutorial fails to work.
After some searching I found the solution which was pretty much manually fixing some lines of the code and of the patch file. I ended up with a new patch file that works with the latest burst_ind branch of Sylvain Munaut. I put it up here:
Whatever I create during trying out this tutorial will be available at the new repo I created: