Classic and 300

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Hi im trying to install full postcode search on my brothers tomtom go, there wasm`t a zip folder in the root, so im wondering if its a 300 or a classic, he doesnt know. So my question is how can i tell. I have created a zip folder and installed the postcode file and yes it does have 7 digit now, but when i type my postcode in it doesnt show it and its the same with several postcodes, its the same file that i installed on mine and mine works fine. So im wondering if it is his tomtom.

Any ideas
Thanks
Archie

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