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ARTICLE · 12 MAY 2026

The SDK In Your App May Be Your Next Class Action Lawsuit

Frankfurt Kurnit Klein & Selz PC
Frankfurt Kurnit Klein & Selz PC
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Frankfurt Kurnit Klein & Selz PC

Frankfurt Kurnit Klein & Selz PC

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A federal court in California has allowed a class action lawsuit to proceed against mobile ad network InMobi, alleging its SDK violates state wiretap laws by collecting user data without proper disclosure or consent.

United StatesLitigation, Mediation & Arbitration

Recently, a federal judge in the Northern District of California denied major ad network InMobi's motion to dismiss a putative class action alleging that its mobile advertising SDK functions as an unlawful pen register under California Penal Code § 638.51. Caldwell v. InMobi Pte Ltd., No. 25-cv-09977-AMO (N.D. Cal. Apr. 29, 2026). The court also sustained claims for intrusion upon seclusion and invasion of privacy under the California Constitution.

While this is not the first time a court has sustained claims based on a mobile SDK, Caldwell is aimed squarely at the ubiquitous, mobile ad tech ecosystem. The decision extends risk to every company that embeds a third-party ad-serving SDK in its app.

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