Thread: help about topnavi GM-6950 KOrean device

Before asking a question, know it's already discussed here and at 99.9% is not unique. Use search.
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Spoiler: obs

Many questions become very arduous, a lot of time chewed deja vu...Since we have lost all the year of work and effort, many people have no will to answer the same questions again. Me neither. Use a search, please.