Convert fenix 5S/5/5X Plus to D2 Delta S/Delta/Delta PX

**mbirth** · 13th June 2021, 12:50 PM

The 5 Plus series (5S Plus/5 Plus/5X Plus) all have the same main firmware (but different SensorHub firmwares) as have the D2 Delta series (D2 Delta S/D2 Delta/D2 Delta PX). So you can use the 5 Plus files.

**aliceliang** · 13th June 2021, 11:05 PM

@mbirth
Sorry to bug you again.
Is there a way to downgrade the firmware from V7.0 to 6.0?
I successfully converted my 5s plus and updated it to V7 but want to downgrade the firmware since V7 is buggy.
TIA

**mbirth** · 13th June 2021, 11:37 PM

It is now.

I've just uploaded fenix 5 Plus 15.30 <=> D2 Delta 7.00 files to the MEGA share. So you can convert back to fenix now.

**aliceliang** · 14th June 2021, 12:34 AM

I renamed the D2Delta700_to_f5P1530.gcd file to GUPDATE.gcd and put it under the Garmin folder.
Though the update showed up and my watch rebooted, the update didn't seem to stick and the watch is still stuck at V7.
What did I do wrong?

**mbirth** · 14th June 2021, 01:09 AM

Hmm ... I don't know why it doesn't want to work. However, I've uploaded an alternative firmware file which sets the "Reset/Downgrade" flag. Maybe this one works. Otherwise, try to downgrade to a previous D2 Delta version using the Backdate-firmwares (they work the same - rename to GUPDATE.GCD and put into GARMIN folder on watch) and then try to convert from that older version to fenix 5 Plus.

**aliceliang** · 14th June 2021, 01:51 AM

The alternative firmware file worked. Thank you so much for your help!

Thread: Convert fenix 5S/5/5X Plus to D2 Delta S/Delta/Delta PX

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