You are correct, here I found them both on AVM: https://en.avm.de/products/fritzbox/fritzbox-7530-ax/technical-specifications/ 20002930 (Germany) 20002944 (International) Interesting why in Austria only 2930 are sold, and we need different plugs too, usually international versions are sold here – I’m very confused! I would assume you can use them both anyhow, only ask for uk-adapters, which is neccessary for both when bought outside UK. Another interesting fact, that boxmatrix shows 20002930 for de and uk, while 20002944 is listed as provider-version: https://boxmatrix.info/wiki/FRITZ!Box_7530_AX At the end I still believe 2930 is for all markets and you have to ask for uk-plugs if sold outside your country while 2944 may have some provider limitations (unknown). There are only 5 hits on google for ‘7530 AX “20002944”‘.
Indeed, BoxMatrix also shows just Annex B and J for the 20002930 version as well and even the AVM website shows the same:
“¹ Annex A and Annex M are only supported by the FRITZ!Box 7530 AX Edition International with the AVM article number 20002944.”
https://en.avm.de/service/fritzbox/fritzbox-7530-ax/knowledge-base/publication/show/37_Supported-DSL-lines/
All the information on the 7530 AX is a little confusing haha but surely it would work as the firmware I have on my current 7530 allows me to switch between Annex A and B (I need Annex A). Do I risk buying it? 
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