[SOLVED] by updating to latest firmware, the old v18.00 cannot read newest charts
Hello, and thank you for your great job in this forum.
I have before the latest firmware version installed V29.01 on my Echomap UHD 72cv. I’ve copied the patched version dated 2021.09.20 to the SD card, flashed success by followwing thoses steps :
1. Turn the device Off
2. Hold the Power button and number 4 button
3. Release the Power button when the Garmin logo appears
4. Release the number 4 button when Recovery Loader Ready appears
5. Insert the software update card
6. The device will now install the software update
After the downgrade, Now i have the Software version : 18.00 patched version
downloaded from :
[Please Register or Login to download file] but I still can't read the "that seem" unlocked charts
like : BlueChart g2 - HXEU718L - Mediterranean Sea 2017.0 (v18.50)
i used the map unlocker and unlocker alternative, but same issueWhat did I miss ?