Ex. 23.1 Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-159743, 333-66626, 333-85560, 333-63276, 333-56412, 33-89922, and 33-43253) of InterDigital, Inc. of our report dated February 27, 2012 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.