This part is a kind of semiconductor called RF7176.

Function of this product has QUAD-BAND TX / DUAL-BAND RX GSM/GPRS TRANSMIT MODULE.

Manufacturers : RFMD

Image and pinout :

Some of the text within the PDF file :

RF7176 QUAD-BAND TX / DUAL-BAND RX GSM/GPRS TRANSMIT MODULE Package Style: Module 6.63mmx5.24mmx1.0mm VRAMP TX ENABLE GPCTRL0 GPCTRL1 VBATT NC Features • Enhanced Performance Transmit Module • High Efficiency at Rated POUT VBATT=3.5 GSM850/EGSM900=42% DCS1800/PCS1900=36% • Integrated Power Flattening Circuit • Integrated VBATT Tracking Circuit • 6kV Robust ESD Protection at Antenna Port • No External Routing • Low RX Insertion Loss • Symmetrical RX Ports • 0dBm to 6dBm Drive Level, >50dB of Dynamic Range Applications • GSM850/EGSM900/DCS1800/PCS1900 Products • 3V Multimode Mobile Applications • GPRS Class 12 Compliant • Portable Battery-Powered Equipment GND 1 22 GND 2 RFIN HB 3 GND 4 RFIN LB 5 GND 6 7 21 20 19 CMOS Controller 18 17 Amplifier 8 9 10 Sw [ ... ]

RF7176 PDF Datasheet Download