Thread: How to convert 3790us to 3790 Sg/My

Originally Posted by kentcp

hello aekhong,
Is me again. Today, I tried to upgrade my 3790t (initial is US version) SG/MY v2.30 to SG/MY v2.50 but failed. It stop after "Garmin" logo.

1) I make a mistake without H/R before flash with rgn
2) I forget to disable all of Text., Keyboards ., Voices ., before flashing
3) I'm using previous US boot.bin (HWID1101 ) that I used to convert US to SG/MY v2.30 (will this caused an issue too ?)

Then I flash with cure.rgn that you provide during I convert US to SG/MY. After flash, it can continue after "Garmin" logo and shown "load maps" , after "load maps" immediate it turn to another error screen below and only allow to exit and turn off device itself.

---GIR Version Mismatch---

GIR Checksums:
0x587acf0
0xe79e5f0

System Expected Checksums:
0x70a2510

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You did not do anything wrong.
3790US can not use Sg/My 2.50 (so you get rebooting loop ., it's normal)
Nobody can flash 3790US to 3790Sg/My 2.50 till now.

For returning

1). Just flash your nuvi with the last rgn file via updater.exe (rgn file for 3790US to 3790Sg/My 2.30 you used.)
2). If you don't have that file., so just use original US gupdate.gcd saved to rgn file to flash your nuvi or make a rgn file to be Sg/My2.30 and flash again.


Gir Mismatch means you use resources.bin in different region from fw_all.bin
in this case your nuvi have Sg/My fw_all (and you flashed with non Sg/My resources.bin)

You can return to Sg/My2.30 as I said above.