[Sandbox] Additional Frequency support
 

http://maemo.org/community/brainstor...y_support-002/


Dear Brainstormers,
Hopefully I do this right. I was told by a Nokia rep to post my idea as a bugs then told by the bugs moderators to post it to brainstorm. So, here I am. I was wondering if it is possible to somehow edit the Nokia supported frequencies to support the 850/1900mHZ range? If someone here could please enlighten me and the rest of the community as to whether this is a hardware or software/firmware issue?

If it is a hardware issue, could it be possible to edit the hardware through the use of a different modules or antennae? If it is a software issue , hopefully, can we expect some wort of support in the near future? I'm sure it wouldn't be difficult if the latter was the case.

Thanks,
Kham

Re: Additional Frequency support
 

it is actually a chip-set with the freq on it. a software swap will not work.

at this point, i am not sure if there is another unit with the same chip to swap that would be compatible.

a friend and i have been contemplating taking a N95 chip out and putting it in an e90 to get a 3g e90, but we stop everytime we think of coming up with all the extra money.

in theory, those two phones use the same everything except for an ATT 3g compatible chip.

Re: Additional Frequency support
 

Sory to tell you that this is a hardware problem; hence, it wont be possible to implement. You'd have to wait for maemo6 device, which may support 850/1900MHz Frequency range.

Re: Additional Frequency support
 

Thanks for the quick response, guys. Where did you guys obtain this information from or are they highly educated practical assumptions? Also, would you guys have any type of pictures of the chipset or a model number associated? Or will I have to open up my N900?
Thanks again,
Kham

Re: Additional Frequency support
 

Have you looked at the FCC docs?

Re: Additional Frequency support
 

You are the man, I think this has sparked some sort of hope in this search for AT&T 3G support in the N900. Firstly, this is the internal pic set--https://fjallfoss.fcc.gov/prod/oet/forms/blobs/retrieve.cgi?attachment_id=1150127&native_or_pdf=p df does anyone know what the frequency chip looks like? Secondly, and MORE IMPORTANTLY, it looks like the 850/1900 range is ACTUALLY AVAILABLE on this chip as it was tested in these reports ---- https://fjallfoss.fcc.gov/prod/oet/f...ive_or_pdf=pdf --, EXTENSIVELY. Look at pages 5,12, 13, 21, 30, 33-40, 47-53, 59-61, 63-64, and page 76. Can someone more knowledgeable confirm that I am not crazy?
---Kham

Re: Additional Frequency support
 

those tested are more over going to be for gsm instead of wcdma, those are the most widely used frequencies for gsm and edge network in north america.

Re: Additional Frequency support
 

yeah, they are gsm frequencies rather.
But I wonder if Nokia ever followed through with this?
http://www.nokiasiemensnetworks.com/...dge-data-speed

Re: Additional Frequency support
 

Ok, so is it possible to change that frequency type using software? If it works at a certain frequency, that is the main hurdle, correct? The type of data transmitted/received is just processing? Could someone explain a little further if they know?
Thanks,
Kham

Re: Additional Frequency support
 

I dont know why and by whom you were sent around to find some place to post this as the specifications page shows the frequencies as supported?! :confused: It is a quad-band phone... only some US proprietary frequencies are not supported afaik.

So it is a problem related with your provider, not the phone capabilities.

Re: Additional Frequency support
 

The bug, #8240, was resolved "MOVED" with Kham being directed to Brainstorm. Given a hardware limitation in the N900 bars its use with AT&T's 3G, I'm not clear on exactly what Kham is expected to brainstorm. My only guess (and it's a stretch) is that this may be seen as a method of collecting votes for additional or different frequency support in future Maemo devices.

Re: Additional Frequency support
 

Yeah, basically, or see if there is any hardware "hack" available. Also, I am wondering if anyone can enlighten me on the hardware difference between the WCDMA and EDGE frequencies, and why they cannot be edited through software/firmware changes?

Also, "US proprietary frequencies" they are not. Also used in Canada, South America, and Australia, I believe. So, this would certainly help Nokia's market share.

-----Kham

Re: Additional Frequency support
 

Great research Kham, I do support your effort :)
keep going on.

Re: Additional Frequency support
 

there are 2 other thread that where discussing the same issue 1 and 2 months ago. one was AT&T, the other changing frequency and has I remember nothing can be done except hardware

Re: Additional Frequency support
 

I do remember those threads but the conclusions are not determinant, that is why ppl keep trying it. See the right side, it is good 4 every1 know about the real issue on it.

Had the feeling that the hardware supports it :) just because of "regulations,strategy,etc" it is just limited to the bands released.

If there is a way of course I will use it here for Perú 850-3G. Hack, trick,Swap chip, SW tunning up, etc. that could be useful for many.

So, what cellphone component or linux package/library/BIOS controls the BANDS ?

Re: Additional Frequency support
 

Now I get it... talking about wcdma frequencies ;)
I think its f range the chip can tune to at the hardware side.
Which ranges are supported is highly up to the manufacturer; you can have this discussion for all continents... some phones for N/S-America wont fit for Europe... and the other way round.

AT&T 3G support no win Brainstorm!!!
 

Submitted to Brainstorm!! PLEASE VOTE!!

http://maemo.org/community/brainstor...y_support-002/

Re: [Sandbox] Additional Frequency support
 

1year later... done