For enable JCV with FW 6.20 you have in the post [Only registered and activated users can see links. ].
First when nuvi 1300 come in store, all nuvi have splash D1340-00 and all 1350 have D1340-30.
After 6 month or 1 year came new nuvi 1300 and 1350 with default number D1340-50.
You buy your nuvi long time ago or from old series.
I buy nuvi 1300 when he came out and in that time all nuvi 1300 in the EU and USA have splash number D1340-00, only nuvi 1390 and 1490 have splash D1350-50
We first enable JCV with CHN number D1340-65 and then try with splash from 1490 and found out that D1340-50 work for enable speed, La and JCV
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