Which is better, the version number C1204-C7 M08-3E21J0x or c2992-c7m09-3d2 1j0w?
From the main program, c 1204 and c2992 represent different brands of navigators. If you use it wrong, navigation may not work, and there is no good problem.
From the map version, 3e2 1j0x is the summer version of 20 17, which is the latest version at present. 3d2 1j0w is the spring picture of 20 17 released in early April.