THIS ACKNOWLEDGEMENT AND CONFIRMATION (this “Letter”) is entered into on March 31, 2012, by and among Coolsand Holdings Co., Ltd., a Cayman Islands corporation, Masshall Limited, a British Virgin Islands corporation, and Coolsand Technologies (Hong...Acknowledgement and Confirmation • April 10th, 2012 • Warburg Pincus Private Equity VIII, L.P. • Semiconductors & related devices • New York
Coolsand Holdings Co., Ltd. /s/ Julian Cheng Name: Julian Cheng Title: Director Masshall Limited /s/ Julian Cheng Name: Julian Cheng Title: Director Coolsand Technologies (Hong Kong) Limited /s/ Ding Yi Name: Ding Yi Title: Director RDA Microelectronics, Inc. /s/ Vincent Tai Name: Vincent Tai Title: Chief Executive Officer
EXHIBIT 4.21 ACKNOWLEDGEMENT AND CONFIRMATION TO: James E.H. Darby 550 Lowry Lane North Vancouver, British Columbia, V7G 1R3 (the "Lender") The undersigned refers to: 1. the loan consolidation agreement made effective as of the 1st day of October,...Acknowledgement and Confirmation • March 31st, 2004 • Consolidated Envirowaste Industries Inc • Agricultural chemicals
