This is the headphone adapter: http://www.amazon.co.uk/gp/product/B002DFGCMA/ref=s9_simh_gw_p23_i2?pf_rd_m=A3P5ROKL5A1OLE&pf_rd_s=center-2&pf_rd_r=1T23PDB91ZCVNB566J6R&pf_rd_t=101&pf_rd_p=467128533&pf_rd_i=468294
It says that it works with HTC and the G1 phones and the headphone socket looks...
