I think that the Via 1605 was only sold as a Via 1605M or Via 1605TM (the first with lifetime maps, the latter including a traffic receiver). So rather than calling customer support, what you really need to do is to contact the seller to ASSURE that they will provide you with a legit TomTom MyDrive Connect account and password for this device so that you don't have to go through the hassle of dealing with TomTom to try to change it. Unlike the old days using TomTom Home, I believe that MyDrive Connect actually expects a particular serial number to be associated with a particular account, though it will allow multiple (up to 10) devices to be associated with one account.
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