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Simply replace original gmapprom (unlocked with gimgunlock) in .system and remove old gmapprom.unl and .gma.
That's all.
Look at garmindevice.xml in Garmin folder for supported addition files and their paths and replace old files in nuvi.
gmap3d.img too must be unlocked.
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12th March 2015, 11:09 PM #1Important User
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You have to navigate to get to the good.
Galaxy S5 Kitkat 4.4.2 / Nuvi1200->1250 / Nuvi3790T->34xx / Nuvi 2200 / Nuvi 66 / Oregon 600
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13th March 2015, 01:20 AM #2Member
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Looking at the .system folder there are no files with an extension of .unl or .gma
there are only :
fs_image.ver
gmapbmap.img
gmapbmap.sum
gmapprom.img
gmapprom.sum
gmaptz.img
gmaptz.sum
locales.xml
TrafficProvider.xml
There is no garmindevice.xml in the garmin folder or it's sub folders, the only item in the garmin folder is a sub folder LEX_PKG.
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15th March 2015, 06:11 PM #3Junior Member
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the gmapprom.img should be the large file with the maps inside. If you are unsafe what to do, take a 4GB micro sd card, create a folder "map" on the sdcard, and copy the 2015.40 version "gmapsupp.img" in the map folder on the sdcard. The original gmapprom.img on the device rename to gmapprom.im_, so the nuvi cannot detect the old map. If the new mapfile doesnt work, you can go back the steps without "data loss".
Originally Posted by NickSums
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