This part is a kind of semiconductor called MT6253.
Function of this product has GSM/GPRS Baseband Process.
Manufacturers : MediaTek
Image and pinout :

Some of the text within the PDF file :
MT6253 GSM/GPRS Baseband Process Data Sheet Version: Release date: 0.99 SP1 2009-07-30 © 2009 MediaTek Inc. This document contains information that is proprietary to MediaTek Inc. Unauthorized reproduction or disclosure of this information in whole or in part is strictly prohibited. Specifications are subject to change without notice. Revision History Revision Date Comments 0.99 May 22, 2009 Initial draft version 0.99 SP1 Jul 30, 2009 Special patch version MT6253 GSM/GPRS Baseband Process Data Sheet v0.99 SP1 Confidential A MediaTek Confidential © 2009 MediaTek Inc. This document contains information that is proprietary to MediaTek Inc. Unauthorized reproduction or disclosure of this information in whole or in part is strictly prohibited. Page 2 of 643 MT6253 GSM/GPRS Baseba [ ... ]
MT6253 PDF Datasheet Download
