X0306 4 2015-10-28 0 0001082506 UNWIRED PLANET, INC. UPIP 0001429074 Mast Capital Management, LLC 200 CLARENDON STREET 51ST FLOOR BOSTON MA 02116 0 0 1 0 0001429076 Steinberg David J. 200 CLARENDON STREET 51ST FLOOR BOSTON MA 02116 0 0 1 0 Common Stock, $0.001 Par Value 2015-10-28 4 S 0 4511389 0.8765 D 0 I See Footnote Common Stock, $0.001 Par Value 2015-10-28 4 S 0 4338000 0.8765 D 0 I See Footnote Common Stock, $0.001 Par Value 2015-10-28 4 P 0 8849389 0.8765 A 10117671 I See Footnote Common Stock, $0.001 Par Value 10951109 I See Footnote The filing of this Form 4 shall not be construed as an admission that MAST Capital Management, LLC ("MAST Capital") or David J. Steinberg, the principal of MAST Capital, is or was for the purposes of Section 16(a) of the Securities Exchange Act of 1934, as amended, or otherwise the beneficial owner of any of the Common Stock, $0.001 Par Value (the "Common Stock"), of Unwired Planet, Inc. (the "Issuer") purchased by certain private investment funds advised by MAST Capital (collectively, the "MAST Accounts"). Pursuant to Rule 16a-1, both MAST Capital and Mr. Steinberg disclaim such beneficial ownership except to the extent of such person's pecuniary interest. Mast Credit Opportunities I Master Fund Limited, for which MAST Capital is the investment manager, holds 0 shares of Common Stock of the Issuer. David J. Steinberg reports the Common Stock held indirectly by MAST Capital because, as the principal of MAST Capital at the time of purchase, he controlled the disposition and voting of the securities. MAST Capital has the right to an asset-based fee relating the above fund. Mast Select Opportunities Master Fund LP, for which MAST Capital is the investment manager, holds 0 shares of Common Stock of the Issuer. David J. Steinberg reports the Common Stock held indirectly by MAST Capital because, as the principal of MAST Capital at the time of purchase, he controlled the disposition and voting of the securities. MAST Capital has the right to an asset-based fee relating the above fund. Mast Admiral Master Fund LP, for which MAST Capital is the investment manager, holds 10,117,671 shares of Common Stock of the Issuer. David J. Steinberg reports the Common Stock held indirectly by MAST Capital because, as the principal of MAST Capital at the time of purchase, he controlled the disposition and voting of the securities. MAST Capital has the right to an asset-based fee relating the above fund. Mast OC I Master Fund LP, for which MAST Capital is the investment manager, holds 10,951,109 shares of Common Stock of the Issuer. David J. Steinberg reports the Common Stock held indirectly by MAST Capital because, as the principal of MAST Capital at the time of purchase, he controlled the disposition and voting of the securities. MAST Capital has the right to an asset-based fee relating the above fund. /s/ David J., Steinberg, Authorized Person of MAST Capital Management, LLC 2015-10-28 /s/ David J. Steinberg 2015-10-28