Tom Tom ONE IQ Routes edition

lefty1

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Hi All - my mother in law has a tom tom, and I suspect it is quite old. Just had a look at the version, it is a TomTom ONE IQ Routes Edition with a UK & ROI v835.2419 map. The Tom Tom Home website states that the latest version of the map is currently 975.

Does anyone know how I can update this device for her without having to sub?
 
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