T-Mobile to Depart VMware Amid Broadcom Lawsuit, Migrating 303,000 Cores

T-Mobile is in the midst of a significant migration of its VMware environment as it battles Broadcom in court. According to a report by The Register and cited by Slashdot, the telecom giant is moving its 303,000-core VMware infrastructure to an alternative platform while simultaneously fighting Broadcom in court for extended support that was guaranteed under a perpetual licensing agreement.

The court-mandated support period is set to end on August 3, 2026. The Register notes that the matter carries a sense of urgency, as T-Mobile risks losing support for its extensive VMware environment if the deadline passes without resolution.

Terms of the Disputed Contract

The dispute stems from a 2023 agreement between T-Mobile and VMware. Under the agreement, T-Mobile acquired perpetual licenses for certain software, a two-year support period, and an option for an additional year of support.

However, the situation changed dramatically in 2023 when Broadcom acquired VMware. Broadcom halted the sale of perpetual licenses and eliminated standalone support contracts for existing perpetual license holders. Additionally, VMware products were consolidated from a catalog of over 150 offerings into two subscription-based bundles, primarily focusing on the Cloud Foundation (VCF) private cloud suite.

Other companies, such as AT&T and Tesco, also sought to exercise their rights for extended support under similar agreements. Broadcom, however, declined their requests. AT&T later settled the matter under undisclosed terms, while Tesco continues its legal battle.

Broadcom argues that even if customers wish to exercise their options for extended support, the products covered under the contracts no longer exist. Furthermore, the company asserts that its terms and conditions allow it to refuse support for discontinued products, emphasizing that subscription models are now the industry standard.

Injunction and Support Costs

T-Mobile has been using VMware products since 2008. In court proceedings, the company’s lawyers described VMware implementations as “the foundation of [T-Mobile’s] entire internal network” and “the environment where 1,000 applications are running.” Other court filings indicate that T-Mobile operates VMware software on more than 303,000 CPU cores.

According to court documents, Broadcom informed T-Mobile in 2024 that it would not renew the initial two-year support contract, which was set to expire in 2025. The two companies have since been negotiating new contractual terms. T-Mobile sought an injunction to compel Broadcom to provide extended support, while Broadcom argued that T-Mobile had intentionally delayed its injunction request.

At one point, T-Mobile proposed paying $20 million for two additional years of support. In a declaration filed last week, T-Mobile’s Vice President of Technology, Kevin Luu, stated that the proposal was intended to allow the company to complete its migration from VMware in a more orderly manner.

The court ultimately issued an injunction requiring Broadcom to continue providing support beyond August 2025. However, the injunction was contingent on T-Mobile paying $5.28 million and depositing a $500,000 bond.

While Broadcom complied with the injunction and continued support, it filed a countersuit seeking damages, arguing that the injunction deprived it of new contractual opportunities with T-Mobile. The telecom operator rejected Broadcom’s claim, asserting that the two parties were still negotiating a new agreement at the time.

Reports indicate that Broadcom has since demanded $24 million for extended support covering six products.

Practical Challenges of Migration

T-Mobile faces an immense challenge in migrating its 303,000-core VMware environment to a different platform. Considering that more than 1,000 applications run on this infrastructure, the migration is expected to take several years and require substantial resources.

With less than a month remaining before the injunction-mandated support expires on August 3, T-Mobile risks having to operate its large-scale virtualized environment without support if the migration is not completed in time.

Industry Impact of Broadcom’s VMware Strategy

Broadcom’s strategic changes following its acquisition of VMware have sent ripples through the industry, affecting numerous large customers. The elimination of perpetual licenses in favor of subscription models represents a significant shift, particularly for companies that have historically relied on long-term IT investment planning.

Telecommunications companies, in particular, often use VMware as a core component of their network infrastructure. For businesses like T-Mobile that rely on VMware for mission-critical systems, transitioning to a new platform poses significant technical and business challenges.

The contrasting responses of other companies—AT&T’s confidential settlement and Tesco’s ongoing litigation—suggest varying strategies to address similar issues. T-Mobile’s case stands out as one of the largest and most visible challenges to Broadcom’s new strategy.

In the virtualization market, companies like Nutanix, Microsoft Azure Stack HCI, and open-source platforms such as KVM and Proxmox VE offer alternatives to VMware. However, T-Mobile has yet to disclose which platform it will adopt.

Editorial Opinion

In the short term, all eyes will be on the August 3 support deadline. If T-Mobile cannot complete its migration by then, the company will face the dual risks of operating without support or negotiating an interim agreement. Meanwhile, Broadcom faces its own risks, as it juggles litigation and attempts to secure new contracts. A last-minute settlement cannot be ruled out.

In the long term, Broadcom’s VMware strategy could reshape enterprise virtualization investments. By shifting from perpetual licenses to a subscription model, Broadcom is not only altering cost structures but also compelling companies to reassess their dependency on specific vendors. This lawsuit is significant because it demonstrates the lengths to which major customers will go to preserve existing contractual terms.

The industry may also see growing demand for alternative platforms like Nutanix or open-source solutions. The key question remains: Will Broadcom’s strategy become the industry standard, or will resistance from large-scale customers like T-Mobile lead to a new market dynamic?

References

• Slashdot: T-Mobile Appears To Be Quitting VMware Amid Support Rights Lawsuit With Broadcom — Published July 1, 2026
• [The Register: Original Article] (Cited in Slashdot)