Yes you can flash DB3150 for free with Kulankendi Client 1.96. Search for W760i_R3CA038_MAIN_GENERIC_DE_CID52.min and for W760i_R3CA038_FS_ADRIATIC_CID52.fsm, flash with those two files, then upload "W760i_1207-2554_R4A_Sunrise_Switzerland" to TPA/preset/custom with "A2Uploader".