Is there any way to downgrade from Sync 3.4 to 3.3?

My car was updated by Ford’s workshop and now I have issues with the radio and connecting bluetooth devices, the conection lost for a second and music don’t play, I didn’t have this issue before the update.

Is there any way to downgrade the software safely? How can I do this?

SYNC Region: EU

Navigation Variant: Nav

Manufacturer Year: Unknown

Install Type: OEM

Old SYNC Version: 3.3

New SYNC Version: 3.4.22200

Do you have a error message, if so what is it?

Update Method: Official Ford

Have you talked to the shop?.
About the BT thing, make the device forget about Sync3, make Sync3 forget about the device, then perform a master reset and re-pair them.

To answer your question you can downgrade to 3.3 with syn3updater

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