I've now successfully proven that the ALL0185A, ALL0186, ALL1297, ALL2100, ALL2110 and ALL6100 devices contain the Linux kernel and are not distributed according to the GPL.
Considering the out-of-court agreement that I have concluded with them earlier this year in ALL0277, I have to say I'm a bit disappointed that this happened again. It should be in their own best interest to distribute within the GPL license terms, and not first try to infringe and wait until somebody complains.
I've contacted them, and they promised to publish the source code and adhere to the license within a short term. Let's see how this continues.