Thread: Garmin GB Discoverer 1:50K - Full Coverage (2.00)

Originally Posted by techsavvy

Has anyone used gb discoverer on a nuvi 310, and if so how did you unlock it?

A bit late reply, but since no one has answered the question yet...

The nüvi 310 (any nüvi 3xx in fact) is not capable of using files larger than 2 GB. The gmapsupp.img file size of GB Discoverer is 2.47 GB. So this map won't work on the nüvi 310, no matter how you unlock it. The unit will simply not show it.

Rapidshire files do not exist. Have you got some mirror links guys? Thanks

Originally Posted by hakkawei

the link file show , file is not found.
can re post again ? with new link ?

Use the links in [Only registered and activated users can see links. ]. Those links are still working and they are also more suitable for free download. Links in post #1 was originally only for Rapidshare Premium users.

Just adding my thanks for the share. All worked perfectly first time and thanks for the tip about the ".unl.txt" thing!

Hi, i thought i should add that this DOES work and is worth percervering over.
I only found this forum last week and had never installed a map in my life before this.
I followed the intructions on here and (apart from forgetting to make a new folder called "Garmin" on the memory card) it worked first time.
Fantastic forum.... cheers for the advice.

i try it too ... it's work fine
try with other explorer ... mozilla,IE,opera

Originally Posted by oracle1207

Hi and thanks to all who replied. I was actually using Firefox and it had worked for all the other segments but not #2. I tried again using Google Chrome and it worked straight off and at a good download speed.

Having got all the parts I now have another problem similar to many people - unlocking it. I have used the Jetmouse Keygen 1.5 with my 1490T unit number XXXXXXXXXX and map id 2043. I would like to have used the sd card id but when I try to get it using the checksum in the service menu I get "0x00000000", which is not accepted by the keygen. This is not a branded sd card, just a 16GB generic. Does anyone have any ideas about unlocking the maps or is there anything I am obviously doing wrong? Both img and unl files are on the sd card in the Map folder. They have both been renamed to "gbdisc50kv2" and there other maps in this folder that do work. Any help would be appreciated.

I'm not sure of how you get the CID by using diagnostics mode on a 1490T. For a nüvi 3790T you will have the 3rd page in diagnostics ""Data Card Test Page" and the "Serial" value. Skip everything about checksum in diagnostics since it's not needed and just takes a lot of vasted time.

Be sure to use JM KG v1.5 with Checksum-fix. Otherwise it will generate wrong keys near 2048=2*2^10 (2043 is close enough and old KGs gives unvalid keys). It should work with [X]:\Map\gbdisc50kv2.img and [X]:\Map\gbdisc50kv2.unl if the key inside the UNL-file is generated with the right KG, UnitID or CID and MapID.

I will send a PM with a 25-char key for your unit.