RM-819 Firmware on RM-801

thesmartguyy

Member
Jan 20, 2012
37
14
0
GUIDE:

As this is a hack, this process will be very similar to the process of flashing a dead Nokia.

1. Search for Device RM-819 on your favourite "firmware download application".
2. Launch Nokia "Product Support Tool For Store 5.0".
3. Select "No Connection" on PST drop down menu.
4. Go File -> Open product -> Select "RM-819".
5. Go Programming -> Recovery.
6. Your recently downloaded firmware should appear on the screen. If not, make sure you have correctly set the "Product" folder and click update list.
7. Make sure that you have removed your screen lock password. (Helps PST to switch phone between modes on restarting, if required).
8. Select your firmware and click start.
9. This should result in an error message.
10. Just follow the error message, Unplug the USB cable->Power down the device(In some cases, it will restart when you remove the cable)->While holding the "Volume up" button, reinsert the cable->Click "Retry".
11. This should start the flashing process, which should result in success.

To Answer the questions:
1. FW to download is "Nokia 800 RM-819 Country Variant Puerto Rico PR Black V1 (059N5J2)". Not sure if you should be using this on cyan.
2. FW Version is 1600.2483.8107.11501
3. Qualcomm did not create a new SOC especially for Nokia, with one frequency gone missing. All the chips are uniform, it just reduces the production cost.
4. Nokia could have implemented a software lock on the frequencies to curb the inter-continent phone sales.
5. Difference between the two: RM-801 is the 900Mhz version of Lumia 800, for Europe, Africa and Asia. And RM-819 is the 850Mhz version of Lumia 800, for Americas.
6.If you are in Europe, Africa, or Asia; Please use RM-801. RM-819 will introduce limitations to your device.

Please backup your data and do it at your own risk, blah blah blah. This will disable high speed data on 900, and enable it on 850.

Feel free to comment and post your results. Good luck!

Format for test results:
Time:
Country:
Service provider:
Network B/W, download:
Network B/W, upload:

Reference for H/W:
Cellular;Phone
Cellular_Networks: GSM850, GSM900, GSM1800, GSM1900, UMTS900, UMTS1900, UMTS2100
Cellular+Data;Links: CSD, GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+
http://pdadb.net/index.php?m=specs&id=3030&c=nokia_lumia_800__nokia_sea_ray

Test Results:
-All the existing functionality has been retained.
-After 3 discharges, battery capacity still at 1437mAh.
-The Battery capacity shown, may vary with the battery temperature, perfectly normal.
-Big improvement on Cellular data. Network B/W on Rogers 3G jumped from 3-4Mbps to 11-12Mbps. This means High speed is working.

Doubts:
According to some speculations by "fshqbizfs", it still does not enable 850. (Thank you).
After looking into the Nokia RM-801 Schematics, I found out that, even though the SoC can support 850, Nokia RF circuit is limited to not support 850 Mhz. I believe that my "H" symbol and higher speed, was a mere coincidence. I guess 850 will never work, unless we swap the RF circuit out.

In the end, this becomes a really long way of installing firmware from a different Device. O Well!
 
Last edited:

tjramage

Senior Member
Dec 19, 2011
152
25
0
Really interested how the charging works out - can you let us know how the battery performs?? Does the max charge capacity drop down to ~1300mAh after a few days usage?

Thanks :)
 

xsacha

Senior Member
Sep 18, 2008
323
213
63
Wow, I look forward to your findings!
I've been waiting for a 3G 850mhz Lumia 800 for ages!! :D
Exactly same position as you. On Telstra in Brisbane.

Where is the RM-819 firmware? I'm going rural for 2 weeks and will definitely need this!

Edit: I refreshed NaviFirm and there it is! Awesome!
 
Last edited:

geekaren

Senior Member
May 25, 2008
230
72
0
Very interesting!!

Just noticed NOKIA Lumia 800 (RM-819) firmware available in Navifirm Plus.

Just to confirm, you flashed
"Nokia 800 RM-819 Country Variant Puerto Rico PR Black V1 (059N5J2)"?

I'm tempted to flash this one onto my EU Lumia 800. Will be interested in your continued observations.
 

Rusty!

Senior Member
Jan 10, 2010
8,027
1,786
0
Portsmouth
I'm certainly sceptical about this having any effect on the 850/900 thing. If it was down to software, Nokia wouldn't have needed to release a new model, they'd have enabled all frequencies from the off.

Take the Nexus One for example, two versions were released, one 850, one 900. The software was identical, same ROM, same baseband firmware. Only difference was the BB chip.
 

xsacha

Senior Member
Sep 18, 2008
323
213
63
I'm certainly sceptical about this having any effect on the 850/900 thing. If it was down to software, Nokia wouldn't have needed to release a new model, they'd have enabled all frequencies from the off.

Take the Nexus One for example, two versions were released, one 850, one 900. The software was identical, same ROM, same baseband firmware. Only difference was the BB chip.
Nokia has been dealing with pentaband for quite a while. It's quite possible the chip does 850 and 900 even though it's Qualcomm.

Why do they lock 850/900 depending on region? Quite simple: carriers. Carriers would much prefer if the users can't switch to competitors in their country. Example: Telstra->Optus.

Why does it have a different RM-#? I'm not sure.
 

Itaintrite

Senior Member
Feb 10, 2008
1,652
323
0
New York.
Anxiously waiting :) I don't care too much about the battery, but want to see if the extra frequency will improve my AT&T 3G.

I see a North America US variant on Navifirm :D
 
Last edited:
  • Like
Reactions: geekaren

fshqbizfs

Member
Sep 4, 2009
44
13
0
I'm certainly sceptical about this having any effect on the 850/900 thing. If it was down to software, Nokia wouldn't have needed to release a new model, they'd have enabled all frequencies from the off.

Take the Nexus One for example, two versions were released, one 850, one 900. The software was identical, same ROM, same baseband firmware. Only difference was the BB chip.
In the case of Lumia 800 things are a little different.
It uses the MSM8255 chip, that supports only three active 3G bands, but they are configurable.
So, to enable 850mhz they had to resubmit the phone to FCC with different bands enabled and the 2100 band switched off.
However, they also changed configuration of other components so, even if it works flashing RM-801 with RM-819 firmware, reception will be sub-par comparing with the original RM-819.
You can read what's different here, in the first document of the list.
I quote
"The WCDMA VIII band of RM-801 has been changed to WCDMA V in RM-819. The TX SAW filter, RF power
amplifier and duplexer (WCDMA VIII vs V) are different. The antenna circuit with RF front end has not been
changed. Otherwise the devices are identical."
 
  • Like
Reactions: chaihg and geekaren

Itaintrite

Senior Member
Feb 10, 2008
1,652
323
0
New York.
Ok, just flashed the RM819 firmware to my Deutschland 801. I downloaded the NAM US variant FW from Navifirm. Renamed product code in filenames to the correct one and flashed with Care Suite. Don't notice any difference in data speed. Guess AT&T really do suck in NYC ;P
 
Last edited:
  • Like
Reactions: geekaren

anseio

Senior Member
Oct 11, 2011
742
140
0
Seattle
Ok, just flashed the RM819 firmware to my Deutschland 801. I downloaded the NAM US variant FW from Navifirm. Renamed product code in filenames to the correct one and flashed with Care Suite. Don't notice any difference in data speed. Guess AT&T really do suck in NYC ;P
Data speeds with AT&T at my home depend on the time of day. During the day, I get standard 200KBps or so (Bps, not bps) and at night I can get up to 1.5MBps.

So, are you in a situation where you're able to differentiate between bands, or do I need to flash mine with RM-819? I'll know immediately if it works.
 
  • Like
Reactions: geekaren