This part is a kind of semiconductor called VC7590.Function of this product has Quad-band GSM / GPRS / EDGE / TD-SCDMA Multimode RF module. Manufacturers : VANCHIP Image and pinout : Some of the text within the PDF file : [ ... ] VC7590 PDF Datasheet Download Metablog 2017/10/28 14:42 2017/10/28 14:42