I have been doing some research and found that the RF transmiter RT6285 is capable of AWS (band IV) (1700/2100 UMTS) or T-Mobile 3G frequencies.
How can we unlock this chip and change the frequency or is it posible (the right person with the right equipment) to unsoder existing chip and transfer it to another phone?
Here are few Atachments that have intersting reading...
This explains what the AWS band is all about and how it will be divided across cariers.
http://www.phonescoop.com/articles/article.php?a=99
The other two are pinouts of the chip and how it interfaces with the MSM7200 family... What got me thinking is that T-Mobile has MyTouch (PVT32B board) and the future MyTouch Fender LE (PVT32A Board... ???) They both seem to use this RTR6285 and the board does not change from Asia to Europe to US... So the chip must be and (it seems in the technical diagrams) is capable of AWS spectrum that would make any phone with this chip able to be used on the T-Mobile or other cariers that will be using this AWS spectrum. MSM72XX is widly spread in WinMo and Android devices.
Please if someone can continue the reaserch or elaborate on the Programing or options with resodering..
Related
I just stumbled across this old thread.
http://forum.xda-developers.com/showthread.php?t=265606
Is the possibility of this true?? Has anyone tried to do work on the Radio ROM to bring in Quad band? I would pay to have 850 available for my phone.
Comments?
Has anyone tried an Athena radio on the Universal ( I presume yes, still looking through the forums ). And what about the HTC Sable? They both use the same CPU and the Sable in particular has comparable ROM sizes.
Quote from one of the links:
QUALCOMM's MSM6250 chipset solution helps enable worldwide roaming for
WCDMA (UMTS) terminals. The MSM6250 system solution supports dual-mode, quad-
band GSM transceiver operations [GSM 850, GSM 900, Digital Cellular System
(DCS) 1800, and GSM 1900] and WCDMA (UMTS) transmit operations for 800 MHz,
1900 MHz and 2100 MHz.
Shouldn't the Universal therefore be able to do 850 with a change to the radio ROM? Do the HTC Sable and Athena use the same chipset?
Can anyone help us?
It would be great to have a 850 band for my SPVm5000. Hope anybody can answer your question. Seems that since this phone was only released for europe and not USA the quadband was not open
I am having a question about the Radio.
I saw the radio thread. There are a quad bands radio. Now, My phone doesn't have UMTS 850 (no 3G support at North America no 3G Icon on the top of status bar). If I flash the quad bands radio, should I get the UMTS 850 3G support?
The short answer is no. The Euro/Asian Diamonds that came out were tri-band gsm and Euro/Asia 3g support. Later an update was released to make them quad band gsm. This was possible because the actual hardware was quad band, it was just locked down. The 3g chip is not triband, it is different in the different diamond models (NAM vs euro/Asian). So while you can make any diamond quad band gsm (if it wasn't to start with), you can not expand the 3g freq because the chip is not in your phone.
Thanks.. I see. Hardware !!!!
I am in Canada and one of our carriers Telus just released the TouchPro 2
telus is a CDMA carrier, however, released the device as a world phone, quad band GSM and UMTS 2100 3G.
I am new to the GSM world and would like to understand better.
Telus and another carrier, bell mobility are building a 3G+ network that they plan to fire up later this year, the CDMA network will stay for a while and HSPA+ will be an overlay network with no GSM support.
Telus and bell plan to use UMTS 850/1900 bands.
When a company like HTC makes a phone, are the UMTS radio's hardware or software?
Is it possible for a OEM working with a carrier to hide UMTS 850/1900 bands or install 850/1900 bands in a new ROM update, say Windows 6.5 ROM?
It does not make sense to me for OEM's to make multiple versions of same phone, I understand each carrier has cosmetic outer requests, I am thinking of the core inside build.
It would be nice to have both networks in case the initial network build out for HSPA+ has issues.
Help!!
UMTS Radio is hadrware.
GSM/WCDMA(or UMTS, if you will) basebands are all hardware as the last poster noted. However, at the request of a carrier, one of the radios in a dual mode CDMA/GSM device can be disabled(as is the case with the dual mode CDMA/GSM version of the Touch Pro2 headed to Sprint here in the US). It is also [theoretically] possible to re-enable the GSM radio in one of the dual mode versions of the Touch Pro2.
On a side note, I wish the CDMA carriers here in the US would transition to GSM technology. I know Verizon will be conducting LTE trials late this year and early next year so that's a plus. It would be nice to transition to LTE, as well, or at least HSPA+....
EDIT: Actually, many OEMs make multiple versions of the same model device. The Touch Pro2 has numerous variants for each carrier which will sell it.
Well, in this case it's a different build from other Pro2's as it has cdma and therefore a different processor.
As for what it is truly capable of I don't know. Carriers have blocked out hardware functionality through software in the past (i.e. certain famous cases of phones with GPS having to wait a long time before a ROM that would let them take advantage of the GPS).
So maybe it's possible. I don't know if it is in this specific case, someone more familiar with the specific hardware and stuff will probably have to weigh in for a definite conclusion.
Hope so though...
UMTS Bands
Wow,
Thank You for the prompt replies.
I think the Telus TouchPro 2 is the same build as Sprint with Telus customization.
I understand that the hardware radio must be present for UMTS 850/1900 to work.
I am not too concerned about the GSM radio(s), just the UMTS radio(s).
According to the spec, it only has 2100 UMTS band
If Telus and likely Sprint have disabled the radio, is it possible to find out if indead the radio would support UMTS 850/1900 and could a cooked ROM enable those above bands?
seems I responded more or less at the same time as jaekidd
anyways...
according to the msm7600 spec sheet it can have the following umts combinations:
2100
1900+850
2100+800
2100+1700+800
2100+1900+850
Now I personally have no idea how one could check to see what options the installed hardware has and whether they are blocking something.
no idea if a new ROM could unlock those frequencies should they be present or how easy it would be to make a ROM to unlock them (they might need a ROM for a device with those features unlocked on that chipset from which to rip the necessary files/drivers for all I know)
And for the record, I think it might be more appropriate to say that the Sprint version is the Telus version with Sprint custommization (after all, the Telus version has come out first), rather than the other way around
and for the record the msm7200 specs sheet says it is capable of the same combinations but personally I can only remember dual band hspa in HTC's phones (the msm7200a sheet doesn't mention the combinations, just the individual bands)
solsearch said:
seems I responded more or less at the same time as jaekidd
anyways...
according to the msm7600 spec sheet it can have the following umts combinations:
2100
1900+850
2100+800
2100+1700+800
2100+1900+850
Now I personally have no idea how one could check to see what options the installed hardware has and whether they are blocking something.
no idea if a new ROM could unlock those frequencies should they be present or how easy it would be to make a ROM to unlock them (they might need a ROM for a device with those features unlocked on that chipset from which to rip the necessary files/drivers for all I know)
And for the record, I think it might be more appropriate to say that the Sprint version is the Telus version with Sprint custommization (after all, the Telus version has come out first), rather than the other way around
and for the record the msm7200 specs sheet says it is capable of the same combinations but personally I can only remember dual band hspa in HTC's phones (the msm7200a sheet doesn't mention the combinations, just the individual bands)
Click to expand...
Click to collapse
HTC FUZE (AT&T's Touch Pro) has 850, 1900, and 2100 and I assume AT&T's Touch Pro 2 will, too.
Didn't know that, just the question remians of when AT&T will get theirs out to market.
OK...the Desire Z only supports 900 and 2100 MHz which is European and Asian 3G bands. Is there any way that it can be made to operate on any North American 3G bands (like 850, 1700/2100, or 1900) or the issue is entirely hardware related, in which case nothing can be done. I should note that the phone has already been upgraded to 2.3.3 so the rooting options are rather limited.
Any contribution will be highly appreciated!!!
Its hardware limited to the bands you have. My understanding (correct me if I'm wrong) is that with that device (if it is unlocked) you will be able to use a T-mobile SIM to get 3G in the US. I'm not 100% sure with this though, as I don't think the DZ has 1700mhz which is needed for T-mobile.
You don't have the correct bands for AT&T 3G. There is a Canadian version of the DZ that will work on AT&T in the US on 850/1900, however.
The device is completely unlocked and unbranded but its specifications clearly state that its 3G frequencies are 900 and 2100.T-Mobile's 3G is 1700/2100 (together) and it's different from the European 2100. Unless the North American bands can be activated via a secret menu, or by flashing a different radio (impossible with 2.3.4), the phone, as is, can't connect to American 3G networks...only GSM 850 and 1900.
So, a miraculous secret menu appears to be my only hope, which, of course, is impossible to implement if the hardware doesn't support it!
Thanks for your concern!
Well, with you phone, you can use only half of tmo's 3g service since they reserve one band for uploads and the other band for downloads. So technically you kinda get 3g, but just 1 way.
Sent from my Desire Z via XDA App
I'm afraid that i can't do that either because the TMO's 2100 3G frequency spectrum is not the same as the European one!
I think I'll exchange it with a friend's European Nexus S which is tri-band 3G and, besides 900 and 2100, it supports TMO's 1700/2100 band! It is an excellent phone but I slightly prefer the metal and the weight of the Desire Z despite the fact that I do not particularly care about the physical keyboard!
Thanks anyway guys!
haki.gr said:
I'm afraid that i can't do that either because the TMO's 2100 3G frequency spectrum is not the same as the European one!
I think I'll exchange it with a friend's European Nexus S which is tri-band 3G and, besides 900 and 2100, it supports TMO's 1700/2100 band! It is an excellent phone but I slightly prefer the metal and the weight of the Desire Z despite the fact that I do not particularly care about the physical keyboard!
Thanks anyway guys!
Click to expand...
Click to collapse
yea. i think mputtr brought up the correct point. The way T-mo uses 3G is 1700 and 2100 separately for down/up, so like you said its different than the Euro 2100 spectrum.
Sorry it didn't work out.
Hi,
Does anyone have any info on how to tell what 3G frequency band Im using on the Galaxy Nexus?
Prior to ICS, you could use *#*#0000#*#* to see what 3G band you were on, but this doesnt work anymore.
Also using *#*#4636#*#* doesnt give any info.
Thanks
Rambler76 said:
Hi,
Does anyone have any info on how to tell what 3G frequency band Im using on the Galaxy Nexus?
Prior to ICS, you could use *#*#0000#*#* to see what 3G band you were on, but this doesnt work anymore.
Also using *#*#4636#*#* doesnt give any info.
Thanks
Click to expand...
Click to collapse
Stock Android has never had a feature to show which band you're using. Let us know if you find anything but I am pretty sure it is not available.
I am curious about this too. I always simply Googled the provider to learn the band I was using.
Sent from my Galaxy Nexus using Tapatalk 2
There's no way to see the band on stock android.
One of the things I want to find out as well. I am surprised there is no way to find this out on a phone like the Galaxy Nexus..
Sent from my Galaxy Nexus using XDA
AFAIK stock android never had any diag menu .
For those looking for my question - skip to the end - I have a bit of background waffle in the middle.
I was also looking for something like this (the iPhone has this feature in its "field test app" *3001#12345# or something like that).
I suspect Google hadn't thought about putting something like this in, because it's only really useful in countries like Australia, where all three major carriers run out multiple bands for 3G/UMTS:
Telstra: 850MHz (Band V), 2100MHz (Band I)
Optus: 900MHz (Band VIII), 2100MHz (Band I)
Vodafone: 850MHz (Band V), 900MHz (Band VIII) and 2100MHz (Band I)
Each carrier operates those frequencies in different regions, with Band I typically in cities (with Telstra starting to install their own network in Metro areas for load balancing for their nationwide 850MHz network), Band VIII typically in regional/rural areas (although Optus is bringing it in parts of Metro Australia), and Band V nationwide (with Voda prioritising Metro regions at the moment).
Seeing as all carriers are currently installing new equipment in the cities (Telstra on 2100MHz, Optus on 900MHz, Voda primarily on 850MHz, but also 2100MHz), it would be handy to see which band my phone is using at the moment to identify when network upgrades have been completed for our area.
Finally, getting to my question - I notice most of the replies say that "stock Android" doesn't have this feature. Does this imply that custom ROMs have this feature, and if so, could someone point me to a custom ROM that has this capability? Thanks
I don't know of any customizations for phones that did not ship with this ability in the firmware.
Some non-stock phones with vendor firmware, notably LG and (NON-Nexus) Samsung, have a proper band select menu. These additions to the OS are closed-source to my knowledge and not available to adapt to other devices.