The Agreement with European Tier One Supplier Further Accelerates GCT's momentum in 5G chipset development with strategic partners

SAN JOSE, Calif.--(BUSINESS WIRE)--#4G--GCT Semiconductor Holding Inc. ("GCT" or the "Company") (NYSE: GCTS), a leading designer and supplier of advanced 5G and 4G semiconductor solutions, announced today the signing of a definitive agreement with a European tier one wireless infrastructure and terminal provider (the "Tier One Supplier") to collaborate on the development of Fixed Wireless Access ("FWA") technology using GCT's 5G solutions including modem chipset and RFIC.

The Company previously announced the signing of an MOU with the Tier One Supplier in August 2024, a continuation of an existing key customer relationship now moving to 5G. GCT expects the launch of FWA devices related to this activity to commence in the second half of 2025.

"This collaboration is a major milestone and reinforces the momentum we are gaining in solidifying customer engagement and strengthening client relationships for growth as we prepare for our 5G chipset launch," said John Schlaefer, CEO of GCT. "We look forward to working together on this significant partner's 5G portfolio and high-performing FWA technology."

The growing 5G FWA technology is a cost-effective alternative to traditional wired broadband options and offers reliable connectivity in remote or underserved areas. Based on the Ericsson Mobility Report (June 2024)*, the number of 5G FWA connections worldwide is projected to increase over 800% from the end of 2023 to the end of 2029, representing an increase from ~30 million connections to ~280 million connections. With its strong expertise in 5G chip development, GCT is fully prepared to take advantage of this growing market.

About GCT Semiconductor Holding, Inc.

GCT is a leading fabless designer and supplier of advanced 5G and 4G LTE semiconductor solutions. GCT's market-proven solutions have enabled fast and reliable 4G LTE connectivity to numerous commercial devices such as CPEs, mobile hotspots, routers, M2M applications, smartphones, etc., for the world's top wireless carriers. GCT's system-on-chip solutions integrate radio frequency, baseband modem and digital signal processing functions, therefore offering complete 4G and 5G platform solutions with small form factors, low power consumption, high performance, high reliability, and cost-effectiveness. For more information, visit .

Cautionary Statement Regarding Forward-Looking Statements

This press release contains certain forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1955. These forward-looking statements include, without limitation, statements regarding Tier One Supplier, FWA and 5G market opportunities and timing of launch of FWA devices. Words such as "believe," "project," "expect," "anticipate," "estimate," "intend," "strategy," "future," "opportunity," "plan," "may," "should," "will," "would," "will be," "will continue," "will likely result," and similar expressions are intended to identify such forward-looking statements. Forward-looking statements are predictions, projections and other statements about future events that are based on current expectations and assumptions and, as a result, are subject to significant risks and uncertainties that could cause the actual results to differ materially from the expected results. Most of these factors are outside the Company's control and are difficult to predict. Factors that may cause actual future events to differ materially from the expected results, include, but are not limited to: the ability of the Company to develop its 5G products and generate revenue; the ability of the Company to enter into and meet the obligations under partnership and collaboration agreements; the ability of the Company to grow and manage growth profitability and retain its key employees; the Company's financial and business performance, including the Company's financial projections and business metrics; changes in the Company's strategy, future operations, financial position, estimated revenues and losses, forecasts, projected costs, prospects and plans; the Company's inability to anticipate the future market demands and future needs of its customers; the impact of component shortages, suppliers' lack of production capacity, natural disasters or pandemics on the Company's sourcing operations and supply chain; the Company's future capital requirements and sources and uses of cash; the ability of the Company to raise sufficient capital to fund its operations; the ability to implement business plans, forecasts, and other expectations, including the growth of the 5G market; the risk that the Company may not be able to repay its debt; the risk of economic downturns that affects the Company's business operation and financial performance; the risk that the Company may not be able to develop and design its products acceptable to its customers; actual or potential conflicts of interest of the Company's management with its public stockholders; and other risks and uncertainties indicated from time to time in the Company's filings with SEC, including registration statements on Form S-1 and quarterly reports on Form 10-Q and those disclosures under the "Risk Factors" sections therein. The foregoing list of factors is not exhaustive. Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and the Company assumes no obligation and does not intend to update or revise these forward-looking statements, whether as a result of new information, future events, or otherwise.

*Source: Ericsson Mobility Report June 2024

• Investor relations website: investors.gctsemi.com
• Investor relations contact: Gateway Group, Matt Glover & Ralf Esper, GCT@gateway-grp.com
• Media contact: Sophie Heerinckx, sheerinckx@gctsemi.com