German telcos have had their feathers ruffled by talk of a spectrum auction re-run, which could also put the squeeze on greenfield Open RAN operator 1&1 to prove it deserves to keep its midband spectrum. Wireless Watch spoke with the CEO of 1&1 Mobilfunk (the mobile side of the telco), Michael Martin, about building a new network and the relevance of Open RAN in an era of global isolationism. As the new kid on the block, 1&1 has been under pressure to prove that it is making the most of its spectrum portfolio. A contentious 5G spectrum auction in 2019 marked the firing gun for 1&1’s race to build not only the first greenfield mobile network in Germany for 30…