Want to update from 3.0.18025 to 3.4.26057

Ford SYNC 3 Support Ford Update Support
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I would also not go any higher than 3.4.23188 on a NAV APIM or 3.4.21265 on a non-NAV APIM.

Ford currently has 3.4.26057 as a dealer only install to deal with a specific recall issue.