Well....It did not worked for me, bu my son (14 years old) did know how to!!
Just one problem keep poping up:
After he put on the factory Nuvi550 software it workes just great like an Nuvi550
When he (or I) want to flash the zumo220 software it still got bricked into Loading Loader?!?!
We tried it now for 5 times, Always the same result :-(
What now??



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