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

Originally Posted by agus6

I've success upgrade my Nuvi 3790T US version to SGMY v.2.30, but everytime I go to tools> settings> display, the unit immediately turn off. What have I missing?

Did you do hard reset after flashing. ?

Originally Posted by aekhong

Did you do hard reset after flashing. ?

Hard reset solved the problem, thanks.

Is it possible to add TTS voice Indonesia (that I've got from Nuvi 1350 Indonesia version) to Nuvi 3790? Tried to add both vpm and sum file but it didn't show up in voice menu.
Any news to go to SGMY 2.50?

Originally Posted by agus6

Hard reset solved the problem, thanks.

Is it possible to add TTS voice Indonesia (that I've got from Nuvi 1350 Indonesia version) to Nuvi 3790? Tried to add both vpm and sum file but it didn't show up in voice menu.
Any news to go to SGMY 2.50?

Maybe., but you need to edit in firmware not just added TTS voice file into voice directory.

Tried with 4.10US + 2.50CHS by editing hwid = 1101, keep rebooting.

PCB version = 8

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

Update your unit software by visiting
[Only registered and activated users can see links. ]

Originally Posted by aekhong

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.

Thanks a lot. I managed return to sg/my 2.30. Lucky and really appreciated your help.

how about fw 2.5?

Hi, I'm new to here, and I'm in desperate to need some helps if admin can kindly offer me.
I have a 3790LMT from US and I have very little info regarding it, after surfing through most websites.
At the moment, I've read through the guide this site offers, and download most software it tells me to, and I'm without luck and somehow got lost in the middle.
Ok, come back what this thread about, I wanna ask if, from the first place, I can convert 3790LMT to 3790MY/SG just like you do it on 3790T here?

For 3790LMT ::
I guess your device has 1101(HWID)
Please comfirm this hwid number by pressing battery icon for a while till you get in Inventory page.
And check your hwid out.

For hwid 1101 ::
You can try to use original US boot.bin saved from original US gupdate.gcd swv 2.50 to swv 4.10

Then combine 3 parts ::

US boot.bin (HWID1101) + Sg/My2.30 resources.bin + Sg/My2.30 fw_all.bin (replace hwid 1288 to 1101 - same as boot.bin) --> out.rgn

Please prepare an original rgn file to come back US.
Using original US gupdate.gcd save to .rgn file.
If you get rebooting loop so just flash your nuvi with this original rgn file.