China Unicom’s US division warned the Federal Communications Commission (FCC) a Trump administration proposal to bar US operators from interconnecting with Chinese telecoms firms deemed national security risks could severely disrupt global communications.

In a filing, the subsidiary stated the FCC’s proposal will “harm US companies with significant business and supply chain interests in China”.

It explained global communications infrastructure is built on a complex web of interconnection agreements between carriers across national borders, and Chinese-funded operators collectivity serve as the primary gateways for traffic flowing between the world’s two largest economies, the US and China.

“A blanket prohibition on interconnection with these entities would fundamentally fracture a critical segment of the global communications network,” the filing read.

As a solution, the unit suggested taking a more narrowly tailored approach that addresses national security risks, “while preserving an open and dependable interconnected global network would better serve the public interest and support the US government’s economic policies”.

In April, FCC commissioners voted unanimously to advance a sweeping notice of proposed rulemaking (NPRM) which would bar China Mobile, China Telecom and China Unicom from operating data centres and PoPs in the US.

The NPRM also seeks to prohibit US operators from interconnecting with entities on the national security covered list, including facilities such as data centres, gateways and internet exchange points owned by those entities.

China Unicom filed right at the FCC’s comments deadline which were due 8 June, 2026, with reply comments due 60 days after on 7 July.

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Mobile World Live brings you our top three picks of the week as Anthropic widened access to its Claude Mythos model despite security concerns, the European Commission (EC) unveiled a fresh digital sovereignty push and the FCC commenced its first spectrum auction in four years.

Anthropic expands Mythos access to 150 new companies

What happened: Anthropic expanded access to its controversial Claude Mythos AI model under the Project Glasswing to 150 additional companies in sectors including power, healthcare and communications, after initially restricting it to a group of private technology players.

Why it matters: Anthropic said the latest cohort brings in sectors underrepresented in the first wave. In commentary to security publication CSO Online, experts noted the expansion could add to security concerns around the model. Carmi Levy, an independent technology analyst, questioned what Glasswing will be able to accomplish by adding 150 more participants, noting the initial point was to allow the AI player to work closely with a small, fully vetted group of vendors to develop stronger defences against cybersecurity risks. “Expanding access into the hundreds may very well bring in more minds to build better defensive measures, but it simultaneously introduces significant concerns around potential leaks.”

Research director for AI security at IDC, Grace Trinidad, added that Anthropic’s announcement pointed out that each of the 150 new participants “will need to meet our security requirements before they gain access”, which also did not build confidence. “Nobody knows what those security requirements are.”

Earlier this week, Anthropic also confidentially filed IPO paperwork with the US Securities and Exchange Commission (SEC), ahead of rival OpenAI’s rumoured float.

EU targets AI, chips in fresh sovereignty drive

What happened: The EC unveiled a fresh digital sovereignty package targeting semiconductors, AI, cloud, open source and energy infrastructure in a bid to accelerate Europe’s push for digital sovereignty.

Why it matters: The package includes a proposed a revamped Chips Act 2.0 and a Cloud and AI Development Act to streamline data centre deployment and introduced measures to expand open source use, support startups and digitalise the energy system. EC president Ursula von der Leyen said Europe “cannot afford to depend on others for the technologies that keep our hospitals running, our energy grids stable and our services secure”.

Jennifer Okafor, a UN and Global Health strategist and AI and data analyst, said the policies represent “a comprehensive approach to balancing growth, stability, and long-term resilience across the EU”. However, president of German digital industry group Bitkom Ralf Wintergerst told Reuters it is “crucial that these efforts do not stop at mere announcements”, while Keegan McBride, director of science and technology at non-profit think tank Tony Blair Institute argued Europe “can’t regulate its way to competitiveness, it must build”. He added, “there’s still much more to do ​if Europe wants to close the gap with the US and China”.

FCC kicks off first spectrum auction in 4 years

What happened: The FCC opened Auction 113, its first spectrum auction in four years, covering spectrum in the 1695MHz to 1710MHz, 1755MHz to 1780MHz and 2155MHz to 2180MHz bands.

Why it matters: AT&T, T-Mobile US, Verizon and potentially SpaceX are among likely bidders. The licences cover territory home to more than 100 million people across 48 states and two US territories. FCC chair Brendan Carr declared: “Finally! The FCC is back in the game,” adding spectrum auctions are “the lifeblood of licensed wireless service”. Carr argued “more spectrum means more building, lower prices and stronger competition”.

Proceeds from the auction will fund the FCC’s “rip and replace” programme targeting Huawei and ZTE equipment in US networks. Indeed, the auction also bolsters the regulator’s broader Build America Agenda, which targets 800MHz of spectrum by 2034.

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The Federal Communications Commission (FCC) opened its first spectrum auction in four years, putting 200 licences on the block for bidding by AT&T, T-Mobile US, Verizon and possibly SpaceX.

Auction 113, formally known as the AWS-3 auction, includes licences covering frequencies in the 1695–1710 MHz, 1755–1780 MHz and 2155–2180 MHz bands.

Those frequencies were originally auctioned to Dish Network, which is now part of EchoStar, in 2014 but never made it into service after a series of defaults and bid withdrawals left them sitting unused in the FCC’s inventory for over a decade.

In 2015, Dish Network affiliates Northstar Wireless and SNR Wireless surrendered a number of spectrum licences worth $3.5 billion after a dispute with the FCC over discounts.

Last week the FCC and EchoStar reached an agreement which included the latter dropping a lawsuit it filed in a US Court of Appeals over the defaults by Northstar and SNR.

Proceeds from the auction which started yesterday (2 June) will fund the FCC’s secure and trusted communications networks reimbursement program, commonly known as “rip and replace”. It seeks to remove equipment by Huawei and ZTE from US communications networks.

The licences cover territory home to more than 100 million people across 48 states, and two US territories. The auction makes over 1.4 billion MHz-POPs available.

FCC chair Brendan Carr did not hold back in marking the occasion.

“Finally! The FCC is back in the game,” he stated while calling spectrum auctions “the lifeblood of licensed wireless service”.

Carr noted getting this auction moving was the first item the FCC voted on at his first meeting as chair.

“More spectrum means more building, lower prices and stronger competition,” he added.

The auction fits into the FCC’s broader Build America Agenda, which is targeting the delivery of 800 megahertz of spectrum by 2034 under the framework set out in President Donald Trump’s Working Families Tax Cut Act, the legislation which also restored the FCC’s auction authority.

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