Thread: Looking for old Garmin Astro 220 firmware 3.50, 3.60

Dear friends I need some help here.
My Garmin Astro 220 has the latest firmware version 3.70
1. I flashed (with Updater.exe_V2.8.0.0) the modified 3.50 firmware to my astro and I had a "software missing" message. The only modification is to replace the French language block with the English one from version 3.70 starting from the Astro220_3.52FR+EU_basemap_by_PouchX firmware.
The updater has terminated successfully.
2. When I flashed the 3.70 again the Updater reads version 3.60 from the astro 220 !!!
3. With RGN_Tool_V094 I changed the version number to 3.60 with the same boot.bin and fw_all.bin but again the "software missing" message.

Am I missing something here ?

Is there any way to dump the fw_all.bin file from another astro 220 running the 3.60 or 3.50 version and flash it directly to my 220 ?
Thank you in advance ...