Database Users

changing bands 900/1900 to 900/1800

I just bought me a QTEK 1010 with ROM v3.08.10ENG and Radio version 6.02.
But my Operator only operates at 1800 Mhz, and i think this phone can only handle 900/1900 (its has model no. PW10B1). Is there any way how i can change this ? or is that impossible?
thx

It wont work, or if it did it would be extremely flaky if it managed to connect bearing in mind the 100mhz difference in frequency.

Hmmz, while i was googling for WALLABY Bootloader, i came on the main site of xda-developers where the bootloader was describer. Then i went into the UTILITIES screen of my bootloader, and changed my settings to GSM 900/1800. And i rebooted my phone.
It looks like it's now running on my 1800 Mhz provider, cause i can make phone calls!
Does this mean that it IS a triband phone?

Not really, where people have been able to get 1900 on 900/1800 phones it has been very flaky at best, let us know how you get on using 1800. By the way, which operator are you using.

Change 900/1900 to 900/1800Mhz ....
I bought a SX56 few days ago in eBay(US) .... I decided to buy because the guy was sure that his phone was TriBand... but when I started to use here in Brazil, I realized that's impossible to find a carrier ...because the GSM here is 900/1800Mhz.... instead 900/1900 from US GSM Mobile.
How can I change the band ???
I presume the SX56 is 900/1900 because I read a AT&T logo ...
But I need to change to 900/1800Mhz...
Could you help me ???
Thanks,
Joe Scheidegger
Sao Paulo Brazil

Hi guys,
thought of saying a couple of important notes:
1. when checking the type of your device, refer ONLY to the sticker on the rear side. do NOT depend on what's written in the device info!
2. the xda 1 is a "dual" band device either 900/1800 (A type) or 900/1900 (B type). both ROM and GSM menu will have the 3 options but this doesn't mean it will work. if you want a tri band device get the xda II

Hello
:shock: XDA 1st working good in Russia . The phone and GPRS .

Re: Change 900/1900 to 900/1800Mhz ....
Joe_Scheidegger said:
But I need to change to 900/1800Mhz...
Click to expand...
Click to collapse
You can try what this other person did: change the band in the bootloader.
Hold the power button while performing a soft reset (large hole, bottom left). After you see the bootloader screen, press the calendar button (top right above display). The options 900/1800, 900 and 1900 are all in the menu. Move with rocker keys (below screen), and press the middle of the keys to select. The soft reset again (without holding power).
1) You may need to remove the SIM and put it back in before the phone 'understands' the change.
2) Your radio part is now operated 100 MHz or ~5% out of tune. And it wasn't a very good GSM radio to begin with. Pray the 1800 provider you're with is high in the band.

Peter said, "Hold the power button while performing a soft reset (large hole, bottom left). After you see the bootloader screen, press the calendar button (top right above display). The options 900/1800, 900 and 1900 are all in the menu. Move with rocker keys (below screen), and press the middle of the keys to select. The soft reset again (without holding power). "
After you do all this, does the original Radio ROM 4.xx.xx or whatever compatible as before? People used T-mobile 6.xx.xx in US for 900/1900 Radio but 4.xx.xx in Europe for 900/1800 Radio.
I knew in the wallaby bootloader they have that utilities but you may need to change the radio as well, is it? I guess....

After testing the mobile on 900/1800 for a while, i would not advise it to anyone of doing it, cause my connection is really sucky sometimes.
If there is anyone in europe who wants to have an XDA 900/1900 for testing purposes and exchange it with an 900/1800. Let me know

Frequencies

Hey folks,
I ran into a problem because of my greed for the very latest OS - I loaded a t-mobile OS into my XDA and when I was looking at the network settings, I discovered that I'd lost signal to my phone so I'm now working to fix that. my question is this - everytime I load WM2003, do I automatically condemn my XDA to be limited to 900 mhz? of course I know the XDA doesn't have the hardware to be running 1900 mhz (US frequency or T-mobile's native frequency), but does loading a WM2003 designed for XDA disable my normal automatic 900/1800 switching for use here in Asia and Europe?
Thanks....

1. T-mobile edition designed for US, ie 900/1900MHZ
2. If you retained your original RSU, try hard resetting.
3. Go to your boot loader, ie press power button while soft resetting, press your Address button, select 900/1800 option
4. Never go to the band option tag again =) but if you do, and the s/w ask you to save or not, just soft reset.
5. Still cannot make it? downgrade your RUU

thanks dude. I finally resolved the problem - I was fortunate enough to still have a copy of XDA Developer's special Edition 1.2 which had a band switcher - used that to switch the band back to normal...

2003 > SER > 2003 ?

I recently got a locked SX56 loaded with the 2003 ROM. To unlock it, I flashed it with the SER and it's working fine now. But I'd like to go back to the 2003 ROM yet keep my phone unlocked.
Before flashing I had backed up the 2003 ROM using XDATools, can i reflash that image into the sx56? Would this keep my phone unlocked? OR do I need to download the 2003 ROM from the Siemens website (really do not want to dl 18 mb!).
Any help is highly appreciated.
Thanks
Omi

You can reflash your backup version. The phone will be unlocked after upfrading...
HTH
Stefan

not able to change bands
Thanks LumpiStefan for your reply, I hope you could also help me with another problem that I'm facing with my XDA.
After changing to the SER, I wanted to switch bands also to 900/1800 but when the I start the band selector tool it gives an ERROR everytime and I'm not able to change bands. It works fine with the operators on 900Mhz but unfortunatley the operator who provides at 1800Mhz is much cheaper and also provides cheap GPRS services here. I'd really like to try the phone on 1800Mhz to see if it would be possible to use the phone with that operator.
Would changing to WM2003 help me change bands easier?
Thanks
Omitav

It all depends on the device type ... only PW10A devices work with 900/1800 (check the rear sticker) ... also the RSU must be suitable for 900/1800 or you may endup killing the device!

Hi Biso007
I've read in the forum that several ppl have changed bands in their PW10Bs and been able to receive 1800 operators (altough the signal strength was usually bad). I wanted to try that out.
How do I find out if my RSU supports 1800 Mhz?
The device info mentions that my Radio is A.33.02, can (and should this) be upgraded?
Thanks for your help.
Omi

I think you mean that some B devices worked on 1800 operator network and this can be true if the operator supports 900 as well (usually they are) and that's exactly my case.
I don't think B device with 900/1900 RSU like yours can work on pure 1800 MHz network ... or what is the need for the expensive tri-band XDA II then :wink:

Right, I got it
Yep, mine works fine with the first 3 operators in the state (since they're all on 900). It only won't work with the 4th operator (hutch) as they're on 1800.
Can't have everything I guess :-(
Hutch provides really affordable GPRS, gonna miss that. The other operator provides GPRS at exhorbitant rates, will have to wait until some operator gives at a cheaper rate.
BTW, where r u located in India ?
Omi

sx56 with no signal in Saudi Arabia

I bought a sx56 (AT&T)from ebay seller and i am now in Saudi Arabia i made unlocking using the especial edition rom from XDA-developer but no signal after that and the device can not find the network even after making band width adjustement to 900 (here in saudi arabia)
Rom version 3.17.03 Eng
My RSU is 4.21
any one can help please!!

what's your device type ? ... A or B ?
You selected 900 MHz from the phone settings or the bootloader GSM menu ?

I selected the 900 from the a program called gsm band it is already been with xda-developer special edition ROM.
How do i enter the the bootloader? and change it to 900

And by the way it is A type. does this type do not work in the middle east or what?

Ramzy,
I had an sx56.
I got it from USA and it works fine with me here in Dammam.
All what I did is change the bandwidth to (I am not sure if I change it to 900 or 1900) any way try both.
You need to go to the phone dialing (The one with numbers and buttons)
Then go to Tools/Options and then Band I think and change it there.
Also, while you are there try to go to Network and find the network manually not automatic.
InshaAllah it will work.
thanks

The device type is the whole point ... check the rear sticker ... if your device is PW10A that means it supports 900/1800 MHz ... and if it's PW10B this means it works for 900/1900 MHz.
The RSU should be the proper one as well ... 900/1900 RSUs will give you 900 only if your network is 900/1800.
Check the device type first, if it's A and your networks is 900/1800 then you should NEVER switch to 1900 MHz
The best and safest way is to use the GSM bands from the bootloader menu. Press soft reset while pressing power ... when it says "GSM OK" press the calendar button and select the right band.

Samsung Omnia i900: Auto mode doesn't switch to 3G when available

I have a Samsung Omnia i900 (XCHG5 updated to the latest J2 firmware - Portugal).
Everything works perfectly except that it doesn't switch automatically to 3G when 3G is available. It just stays in "Edge" mode all the time. If I select WCDMA in the Band selector, it will use 3G but not Edge, of course. The Auto mode seems to not work.
Here in Brazil I'm a subscriber of "Vivo" which uses the 2100MHz band for 3G.
What I tried:
*#1546792*#
and select WCDMA first in the Network order. It keeps the same behaviour. The Auto mode just chooses Edge, even when 3G is available.
Any hints? Has somebody experienced the same issues? Or does your Omnia switch between 3G and Edge without problems?
Thank you!

Well, this is really strange, but I installed Bandswitch:
http://www.smartphonemag.com/cms/blogs/3/tutorial_quickly_switch_between_3g_umts
and it doesn't work. Then I removed and restarted the mobile. For my surprise, now it's with the correct behaviour... First it tries 3G, then Edge... and switch as expected...
Whos knows if Bandswitch did something to Windows Mobile? I don't know... Anyway, I'd like to register it in case someone has the same problem.

SOLVED!
After many attempts, I finally solved this. If someone has the same problem, I'd like to register the solution:
1) type on the phone: *#197328640#
2) [1] Debug Screen
3) [8] Phone Control
4) [7] GCF Test Mode
5) [1] GCF Test Mode
5) [2] WCDMA R5 - HSDPA only
6) BACK and the option GCF Test Mode must be [ON].

I tried it for Rogers - still no 3G I guess it does not really switch bands, i.e. still tries to finds 3G on 2100, not 850/1900...
Anyone succeeded?

comer said:
I tried it for Rogers - still no 3G I guess it does not really switch bands, i.e. still tries to finds 3G on 2100, not 850/1900...
Anyone succeeded?
Click to expand...
Click to collapse
If your Omnia is from Europe, it will just work at 2100MHz, not 850MHz for 3G.
The american one will work only at 850MHz 3G.

Hello Dâniel Fraga,
I have the same issue with my Omnia. I also use Vivomad in Brazil.
I was trying your solution with *#197328640# to access the Root Menu. I don't know why but this code do not work for me. When I try I receive a message "Failed". Can be because the ROM I am using.
Do you know another way to access the Root Menu?
Thanks for the help.

is really useful for me

After some time I was able to access the menu that Daniel said, but the procedure did not work for me.

praico said:
After some time I was able to access the menu that Daniel said, but the procedure did not work for me.
Click to expand...
Click to collapse
Hi praico. Did you find the "GCF Test Mode" option? It must be turned to "on".

Dâniel Fraga said:
Hi praico. Did you find the "GCF Test Mode" option? It must be turned to "on".
Click to expand...
Click to collapse
Yes Daniel, I found that and it is turned on. It is really strange, sometimes it seems to work and sometimes not. I will test it more and I'll let you know.
Thanks for the help.....

Hello Daniel,
Can I make another question? Are you able to make a call when your omnia is in EDGE? Today I found out that mine does not work. Even with a very good EDGE signal my call never complete.
Thanks for the help.

After struggling all the weekend with this problem, I found a solution:
Cause:
Had a flashed ROM of the i900 (the phone part of this ROM seeks only 3G at 2100mhz)
Solution:
Flash the Phone part only, extracted from a i900L ROM (which works at 850/1900mhz)
Now I got my 3G signal back
This is the Phone.bin I used: http://www.megaupload.com/?d=ERQ6368K

would you be able to tell me how to ''Flash the Phone part only'' i'm a newbie
thank you in advance

Don't worry it's working now.
Thanks a million for the solution.

i have a same problemç my phone is toshiba g500 wm5.0ç please help . i select "auto" in mode selection(in 3g area) but i get Edge alltime..

Omnia in 850 Mhz band
I think my Omnia is only for 3G 2100 MHz and in my country we have 3G 850 MHz is there any way to make it work???

flash the phone
I have the same problem I have the phone only searching for 3G 2100 and I need it to look for 850, I downloaded the file mentioned, how do I flash ti as you mention???