[Touch Diamond2, Pure Q&A, Help & Troubleshooting] einsteinecker:
I originally asked this question in the chef forum, but I think it's better off here.

Someone mentioned that the Topaz's newer ROMs have the Broadcomm BT stack. I've been looking through some Topaz ROMs, but I can't seem to find any with the Broadcomm stack. These are the ones I have tried:

RUU_Topaz_hTC_Asia_WWE_1.40.707.1_Radio_Signed_Topaz_61.20t.25.10_3.43.25.19_Ship
RUU_Topaz_S2_hTC_Asia_WWE_2.53.707.4_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship
HTCPUREATTOriginalShipROM

I don't have a legendary connection speed, and thus I don't have the capacity to try them all, but which ones include the Broadcomm stack?

The list of ROMs I am able to get:

xda-diamond2-v2-16-207-3.exe
RUU_Topaz_HTC_RUS_1.39.411.1_Radio_Signed_Topaz_61.20t.25.10_3.43.25.19_Ship.exe
RUU_Topaz_S2_HTC_SPA_2.53.412.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Citrine_TMO_DE_2.13.111.3_radio_sign_topaz_61.42tc.25.31_4.49.25.05_ship.exe
RUU_Topaz_S2_HTC_WWE_2.53.405.5_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_HTC_PTG_2.53.410.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
HTC_Touch Diamond2_RUU_Topaz_S2_HTC_SPA_2.53.412.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_HTC_FRA_2.53.406.4_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
Topaz_HTC_WWE_EastEurope_1.39.479.1_Radio_Signed_Topaz_61.20t.25.10_3.43.25.19_Ship.rar
RUU_Topaz_S2_HTC_NLD_2.53.404.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
mda_compact_v.exe
RUU_Topaz_S_HTC_SPA_2.16.412.1_Radio_Sign_Topaz_61.44tc.25.32_4.49.25.17_Ship.exe
RUU_Topaz_S2_HTC_SVE_2.53.413.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
HTCPUREATTOriginalShipROM.exe
RUU_Topaz_HTC_SPA_1.39.412.0_Radio_Signed_Topaz_61.20t.25.10_3.43.25.19_Ship.exe
RUU_Topaz_S_Vodafone_DE_2.16.162.3_Radio_Sign_Topaz_61.44tc.25.32_4.49.25.17_Ship.exe
RUU_Topaz_S2_HTC_DAN_2.53.403.5_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_HTC_FRA_1.39.406.0_Radio_Signed_Topaz_61.20t.25.10_3.43.25.19_Ship.exe
RUU_Topaz_S_Telstra_WWE_2.31.841.6_Radio_Sign_Topaz_61.39tc.25.30_4.48.25.20_Ship.exe
RUU_Topaz_HTC_ITA_1.39.408.1_Radio_Signed_Topaz_61.20t.25.10_3.43.25.19_Ship.exe
RUU_Topaz_S2_HTC_NOR_2.53.409.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S_HTC_Asia_WWE_2.17.707.1_Radio_Sign_Topaz_61.44tc.25.32_4.49.25.17_Ship.exe
RUU_Topaz_S2_HTC_ITA_2.53.408.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_HTC_WWE_EastEurope_2.53.479.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_HTC_WWE_1.39.405.2_Radio_Signed_Topaz_61.20t.25.10_3.43.25.19_Ship.exe
RUU_Topaz_Dopod_CHS_1.75.706.4_Radio_Sign_Topaz_61.27t.25.23_3.45.25.21_Ship_R1.exe
RUU_Topaz_S2_HTC_TUR_2.53.468.2_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_HTC_RUS_2.53.411.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_HTC_WWE-AFK_2.53.421.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
HTC Touch Diamond2_RUU_Topaz_S2_HTC_SPA_2.53.412.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S_Vodafone_DE_2.16.162.1_Radio_Sign_Topaz_61.44tc.25.32_4.49.25.17_Ship.exe
RUU_Topaz_HTC_GER_1.39.407.1_Radio_Signed_Topaz_61.20t.25.10_3.43.25.19DE_Ship.exe
RUU_Topaz_S2_HKCSL_CHT_2.53.832.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_HTC_ELL_2.53.482.4_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_HTC_GER_2.53.407.6_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_hTC_Asia_TW_2.53.709.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_hTC_Asia_India_de3G_WWE_2.54.1300.2_Radio_Signed_Topaz_61.44c.25.33_2.49.25.204_ESM7206A_Ship.exe
RUU_Topaz_S2_hTC_Asia_WWE_2.53.707.4_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_S2_HKCSL_WWE_2.53.831.3_Radio_Signed_Topaz_61.44etc.25.35_4.49.25.91_Ship.exe
RUU_Topaz_hTC_Asia_WWE_1.40.707.1_Radio_Signed_Topaz_61.20t.25.10_3.43.25.19_Ship.exe