Hello!
I found that our phone support only HSDPA at 1700/2100 MHz. Is it possible to use HSDPA at 900 MHz after some software modification or not?
I have a bad feel that ability to use HSDPA 900 MHz is hardware depending?
i could be wrong, but i'm pretty sure the radio frequency is hardware based, rather than software controlled
Same to me... in my country (Panama) 3G frequency are 900/1900
Sent from my XT720 using XDA App
Although I don't think it will enable 900 Mhz support, you can always attempt a baseband update that more closely resembles your needs.
I got a lot steadier 3G coverage with the European baseband. (in sweden)
same to me, my network operator have HSDPA and 3g on 850/1900 Mhz.
it's any solutions for this?
better 3G coverage
Shadowdancer123 said:
Although I don't think it will enable 900 Mhz support, you can always attempt a baseband update that more closely resembles your needs.
I got a lot steadier 3G coverage with the European baseband. (in sweden)
Click to expand...
Click to collapse
Whoa..are you saying that by using a comparable baseband, but not necessarily my own carrier stock supplied one, I could potentially improve my 3G reception??
Anyone on Wind Canada tried this?
Related
Is there a way to change the 3G Frequencies on the G1 to support AT&T 3G network?
Nope, thats a hardware issue.
I thought it was possibly a software issue. If not, is there a way to change out the chip or the incompatable part to make it compatible?
card13 said:
I thought it was possibly a software issue. If not, is there a way to change out the chip or the incompatable part to make it compatible?
Click to expand...
Click to collapse
Nope...not going to work for many reasons.
been answered plenty plenty of times.
From what I can figure a hardware change may not be required with the correct radio but we dont know the right radio without the right hardware. lol I know that makes no sense but it makes as much sense as anyone can make of it thus far. When its possible I assure you I will be among the first to do it. Although Im not ready to try installing a new radio without first acquiring a backup phone but if I do Im gonna give it a try and maybe have better luck than the last guy to try.
What about a mini-usb attachment that can receive atnt signals?
I am sure with that and the right software manipulation it could work.
sjbayer3 said:
What about a mini-usb attachment that can receive atnt signals?
I am sure with that and the right software manipulation it could work.
Click to expand...
Click to collapse
While it sounds great in theory I doubt anyone would put forth the resources for such a limited market.
You would be best off getting android to work on existing AT&T hardware.
in order to do it we would need hardware which would plug in the bottom and software to tell the phone to use the signal from the attachment.
while there wouldnt be millions in the market i guarantee there are hundreds.
if anyone wants to think about it i dont mind making 50 of em and selling for cost. i have some hook ups in the engineering field i work in
ok, my question is... Europe 3g is diff than tmob usa 3g, but is tmob europe the same 3g setup as US? and if europe 3g is same as tmob europe 3g, is att US 3g same as europe 3g. so if tmob europe is same as europe 3g then a europe g1 should work on att US 3g. am i coming thru clear or am i jumping all over?
Shaggy
Shagman68 said:
ok, my question is... Europe 3g is diff than tmob usa 3g, but is tmob europe the same 3g setup as US? and if europe 3g is same as tmob europe 3g, is att US 3g same as europe 3g. so if tmob europe is same as europe 3g then a europe g1 should work on att US 3g. am i coming thru clear or am i jumping all over?
Shaggy
Click to expand...
Click to collapse
The American G1 has 3G support for HSDPA 1700 MHz & 2100 MHz, both bands I believe are used by T-Mobile. In Europe I believe they use only 2100 MHz band for 3G.
AT&T on the other hand uses 850 and 1900 MHz HSDPA
The phone has the capability for 2G at 850 and 1900 MHz, so technically it can be used on their network, just not at 3G speeds.
Although technically it's possible to design a Phase-Locked Loop to operate at a variable frequency and to be tuned with jumpers or something, it's probably cheaper for them or they might be subsidized to make phones so that they are exclusive for one network in the US.
To me the ideal is more about standardizing the protocols and the frequencies used for all companies, and having all bands available for traffic. But at least in the short-term that's not really good for business and so probably won't happen for a while.
This is all based entirely on a limited amount of research and my opinion, take it for what it's worth.
Europe uses 1900/2100 in a pair (1900 is the uplink, 2100 is the downlink). (source)
Most phones produced these days are tri or quad band and can work (almost) anywhere.. I'm surprised the G1 isn't.
Shagman68 said:
ok, my question is... Europe 3g is diff than tmob usa 3g, but is tmob europe the same 3g setup as US? and if europe 3g is same as tmob europe 3g, is att US 3g same as europe 3g. so if tmob europe is same as europe 3g then a europe g1 should work on att US 3g. am i coming thru clear or am i jumping all over?
Shaggy
Click to expand...
Click to collapse
TonyHoyle said:
Europe uses 1900/2100 in a pair (1900 is the uplink, 2100 is the downlink). (source)
Most phones produced these days are tri or quad band and can work (almost) anywhere.. I'm surprised the G1 isn't.
Click to expand...
Click to collapse
*sigh*.
Folks, you need to learn about UMTS bands before complaining about that the G1 or any other phone can't do this or that when it certainly can.
The G1 is a 3g worldphone. It works on the US 1700 AWS network (UMTS Band IV) and works on the world's 2100 network (UMTS Band I). ATT uses the 1900 Band (UMTS Band II).
Apparently the common names for these networks is being confused with the actual operating frequencies because they don't upload and download on the same frequencies. The 1900 band is not the same as the 2100 band, even though the 2100 band (UMTS Band I) uploads in the 1900mhz frequency and downloads at the 2100mhz frequency range. The 1900 Band (UMTS Band II) uploads on the upper half of the 1800mhz and downloads on the 1900mhz frequency range. UMTS Band II uploads on the frequencies that UMTS Band I downloads.
These bands separate.
TMO 3g band is different from ATT 3g band which is also different from EU 3g band.
The 1700 band (UMTS band IV) is actually made up of 2 frequency ranges like the other bands I and II are: 1700mhz and 2100mhz. In fact, the 2100mhz download range for UMTS Band IV is within the same frequencies used for the Band I download range, theoretically making it cheaper/easier for manufacturers who make Band I phones to "support" UMTS Band IV phone production.
Most phones produced today are NOT "tri or quad-band" 3g phones. In fact, I have yet to find a quad-band 3g phone. If quad-band 3g phones were made, they would be very likely to support the T-Mobile 3g network, because it's the 4th largest UMTS band type (behind Band I, II, and V). I would be very shocked to find a phone which was 2100/1900/900/850 instead of 2100/1900/1700/850.
And the G1 is a worldphone. It works just fine on UMTS in Europe. It is a band I and band IV device.
read these 2 links:
http://www.htc.com/www/product/g1/specification.html
http://en.wikipedia.org/wiki/UMTS_frequency_bands#UMTS-FDD
So to clarify, when you see a list of support bands, this is what you should interpret from those advertised bands:
2100 Band = UMTS Band I (The entire world outside of North America)
1900 Band = UMTS Band II (The Americas, ATT)
1700 Band = UMTS Band IV (The Americas, TMO)
900 Band = UMTS Band VIII (Australia)
850 Band = UMTS Band V (The Americas, ATT)
Outside of North America, the 2100 band is almost universally deployed, even where the 850,900,1700 or 1900 band is deployed.
If you loose your 3g after flashing a rom or sbf, try to flash one of those zip to see if you get your 3g back (based on the wcdma(3g) freq your operator work on).
(Edit: in the previous sentence, "operator" was meant for the "original operator" of your phone. So in other words, select what matches your hardware, not your carrier. If you still have the original box, theres a label with the freqs on it.)
freq_F_CN_026-850-2100-signed.zip: 850, 2100MHz (ref)
freq_F_PL_342_131-900-2100-signed.zip: 900, 2100MHz
freq_F_UK_342_117-900-2100-signed.zip: 900, 2100MHz
freq_F_US_342_107-850-1700-2100-signed.zip: 850, 1700, 2100MHz
I've repacked as zip the files that seem to be resposible to gsm/WCDMA frequencies support on the Defy from several dumps (China, Poland, UK, US, all Froyo based). I'm not 100% sure though that it will work, but if it can help.
PLease report your success/failure here
Here is also another zip that is known to bring 3g back to Argentina users on Personal (Thanks gederico):
Fix_3g_850.1900Mhz-signed.zip: 850, 1900MHz
India & South East Asia Defy: http://www.mediafire.com/?k8dsbbq0ceodv86
Vodafone Spain (from Eclair rom, but seem to work for Froyo too): freq_E_ES_VF2.22.0-850-1700-2100-signed.zip
This will greatly improve flexibility to moving between roms for US users. Thanks adlx
Does use the customer recovery to flash, or via moto recovery?
Has anyone been able confirm that all these different variants of the Defy actually do have different hardware radios as well? Or are they all the same hardware with soft-controlled bands?
Example: If someone lives in an area where AT&T's coverage is 1900 MHz only and no 850 MHz, you shouldn't get 3G on a T-Mobile 850/1700/2100 Defy. What if you flash the 850/1900 3G files - do you get 3G now?
Do different country variants have a different FCC ID inside?
thanks.
ps. are you sure about cn850/2100?
china has cdma800, gsm900 and wcdma2100, so would make more sense to have 2100-only or 900/2100 since wcdma850 would never happen.
Mobile phones can have their 3G antennas optimized for certain frequencies. They can all work on all existing UMTS frequencies but it does suggest that different areas means different radios. Now that still doesn't mean that the radios themselves are different of course but at least it is something to look into.
cmstlist said:
Has anyone been able confirm that all these different variants of the Defy actually do have different hardware radios as well? Or are they all the same hardware with soft-controlled bands?
Example: If someone lives in an area where AT&T's coverage is 1900 MHz only and no 850 MHz, you shouldn't get 3G on a T-Mobile 850/1700/2100 Defy. What if you flash the 850/1900 3G files - do you get 3G now?
Do different country variants have a different FCC ID inside?
Click to expand...
Click to collapse
i can assure you that 3g radio must be different. unless it has a quad/quint-band 3g amplifier, which doesn't exist yet. intalling multiple amps while not using all of them sounds really stupid to me
AgentSmith said:
Mobile phones can have their 3G antennas optimized for certain frequencies. They can all work on all existing UMTS frequencies but it does suggest that different areas means different radios. Now that still doesn't mean that the radios themselves are different of course but at least it is something to look into.
Click to expand...
Click to collapse
the baseband chip should be the same just the rf part is different.
lackyking said:
Does use the customer recovery to flash, or via moto recovery?
Click to expand...
Click to collapse
You need to use Custom recovery
I wish I could forge Motorola signature ;-D
racca said:
ps. are you sure about cn850/2100?
china has cdma800, gsm900 and wcdma2100, so would make more sense to have 2100-only or 900/2100 since wcdma850 would never happen.
Click to expand...
Click to collapse
I'm not 100% sure. I looked for the information yesterday on Motorola's site, specs for Defy in the respective countries. Today I can't get to the ME525 spec page on Motorola.com(chinese). So I can't confirm.
EDIT: just found it:
频率 WCDMA: 850/2100 HSDPA 7.2 Mbps; GSM: 850/900/1800/1900 GPRS; Edge Class 12
source: http://www.motorola.com/Consumers/C...ervices/Mobile-Phones/ci.MOTO-ME525-CN-ZH.alt
adlx.xda said:
Here is also another zip that is known to bring 3g back to Argentina users on Personal (Thanks gederico):
Fix_3g_850.1900Mhz-signed.zip: 850, 1900MHz
Click to expand...
Click to collapse
Awesome! I now have a working Defy in the Movistar Argentina 3g/H network!
Even though out of the box, the unlocked Defy made in argentina did not work with Movistar Argentina, Froyo + this fix did work. Very weird bug.. but very cool fix!
NOW I'm happy about my defy!
U.S. T-mobile on 2.21 Chinese Retail Firmware, confirmed the 3G works with the patch!!!! tks
adlx.xda said:
...
freq_F_CN_026-850-2100-signed.zip: 850, 2100MHz (ref)
freq_F_PL_342_131-900-2100-signed.zip: 900, 2100MHz
freq_F_UK_342_117-900-2100-signed.zip: 900, 2100MHz
freq_F_US_342_107-850-1700-2100-signed.zip: 850, 1700, 2100MHz
Fix_3g_850.1900Mhz-signed.zip: 850, 1900MHz
Click to expand...
Click to collapse
Hey that sounds great and this was the last thing keeping me from upgrading to Froyo. I'm on Australian Telstra network (850) so are you saying I can use either of the US/CN or that last one...do you know which the Au Telstra network is based on or it doesn't matter?
Will wait to hear and then give it a try and report back...
adlx.xda said:
freq_F_PL_342_131-900-2100-signed.zip: 900, 2100MHz
freq_F_UK_342_117-900-2100-signed.zip: 900, 2100MHz
Click to expand...
Click to collapse
What are the differences between these two?
THX IN ADVANCE.
Hello I live in New Zealand and we have a network here called Telecom XT which uses 3G freq: 850 & 2100 mhz.
Unfortunately all Motorola Defy sold here have their freq specified as: 3G Network: HSDPA 900 / 2100
Does this mean that I can flash the "freq_F_CN_026-850-2100-signed.zip: 850, 2100MHz (ref)" file from OP to the 900/2100 phone and the phone will operate 3G on the 850/2100 freq?
Aittle off topic here but, the vibrant has AT&T 3g and T-Mobile 3g built in. You just have to activate the AT&T 3g radio through the secret settings.
Sent from my SGH-T959 using XDA App
Mentioned this already in the Adlxmod F4D thread but I needed the 3G fix to enable reception of 2G GSM 900 MHz on my Chinese/Asian made Defy. It only detected 1800 MHz networks. I used the Chinese 850/2100 fix for this. The UK 900/2100 fix had no result which means I will probably never be able to receive UMTS on 900 MHz with this phone. Not such a big deal though because as far as I know that frequency is quite rare if used at all somewhere for 3G connections. 2G works fine now but we better rename this thread to 2G/3G fix. Not sure about other 2G frequencies though. Isn't the Defy a quad band?
Excellent...today just flashed Froyo UK version and this fix worked a treat.
adlx.xda said:
If you loose your 3g after flashing a rom or sbf, try to flash one of those zip to see if you get your 3g back (based on the wcdma(3g) freq your operator work on).
freq_F_US_342_107-850-1700-2100-signed.zip: 850, 1700, 2100MHz
...
PLease report your success/failure here :-D
Click to expand...
Click to collapse
Success with the US 850/1700/2100 for my Australian Telstra (850Mhz) DEFY.
BTW, how is this different from *#*#4636#*#*?
adlx.xda said:
If you loose your 3g after flashing a rom or sbf, try to flash one of those zip to see if you get your 3g back (based on the wcdma(3g) freq your operator work on).
freq_F_CN_026-850-2100-signed.zip: 850, 2100MHz (ref)
freq_F_PL_342_131-900-2100-signed.zip: 900, 2100MHz
freq_F_UK_342_117-900-2100-signed.zip: 900, 2100MHz
freq_F_US_342_107-850-1700-2100-signed.zip: 850, 1700, 2100MHz
I've repacked as zip the files that seem to be resposible to gsm/WCDMA frequencies support on the Defy from several dumps (China, Poland, UK, US, all Froyo based). I'm not 100% sure though that it will work, but if it can help.
PLease report your success/failure here :-D
Here is also another zip that is known to bring 3g back to Argentina users on Personal (Thanks gederico):
Fix_3g_850.1900Mhz-signed.zip: 850, 1900MHz
Click to expand...
Click to collapse
noob question.. how do i install this? all i see is meta-inf and system folder
I'll be traveling to Beijing in a few weeks and have an unlocked Skyrocket. I will probably get a prepaid card from China Mobile.
I was checking out this thread:
http://forum.xda-developers.com/showthread.php?t=1426001
And was wondering if anyone had a recommendation as far as a better modem to flash to improve things while I'm there (and possibly get 3G speeds) or if the stock modem (I727UCKJ2) would be fine?
It seems that 3G in China requires UMTS 2100. From the Amazon description of the Skyrocket it seems like it might be capable:
It runs on AT&T's 4G LTE and HSPA+ networks (850/1900 MHz; HSPA+/HSDPA/UMTS) plus international 2100 MHz 3G networks. It's also a quad-band GSM phone (850/900/1800/1900 MHz GPRS/EDGE).
Click to expand...
Click to collapse
When I go to service mode on the phone under WCDMA Band Selection I see: 850, 900, 1700,1900, and IMT2000, but no 2100.
Does anyone know if this is going to work in China as is, or if I need to tweak the modem to get it to work, or I'm just barking up the wrong tree completely?
Thanks,
Jeff
So yesterday I flashed this phone to ICS, its great, thanks guys!
However, I have a question about radio (I'm a software guy not a hardware guy).
Apparently, this phone supports Triple band UMTS 1700 1900 2100 MHz.
Rogers Wireless in Canada 'operates on the frequencies of 850/1900 MHz'
So, why can't I connect to Rogers Wireless with 3G speeds on the 1900mhz band? Does the phone require both 850 and 1900 MHz UMTS to operate 3G on a 850/1900MHz network?
The best connection I can get is EDGE and it's painfully slow...I bought this phone before I had a data plan with Rogers, so I never quite realized this issue...I guess I could just switch to WIND I just want to understand why it cant operate 3G over the 1900MHz band
3g needs 2 bands, one for upload and one for download. And that's why most phones, for example, bringing to the T-mo network you won't get 3g/ 4g speeds since it would need both the 1700/2100 bands and not a whole lot of non T-mo phones have these bands. So in your case a phone to run on Rogers with 3g would need both the 850 and 1900 bands.
the hardware should be able to operate at those frequencies but its software locked to 1700/2100 or 2100 mhz, so if you want 3g/hspa you must be on an operator which uses one of those 2 frequencies
Braccoz said:
the hardware should be able to operate at those frequencies but its software locked to 1700/2100 or 2100 mhz, so if you want 3g/hspa you must be on an operator which uses one of those 2 frequencies
Click to expand...
Click to collapse
how do i software unlock it? Does cid uunlocking do this?
Although I haven't use it, I often see 4G Rogers data connection when I'm in Wind's "away" zone. Assuming there are no other models of MT4GS (with different radios) I'm rather sure this phone can use Rogers 3G network.
I've seen that a few samsungs and european HTCs can do this through service mode, but is there any way to force the Sensation 4G to 850mhz? according to HTC, the modem in the phone does support AT&T frequencies and the carrier with the best connection only supports 850mhz in my country, and i reeeally don't want to buy a new phone.
i know it's a longshot, but it's worth trying.
Be careful, you don't want to ruin your device. Watch for overheating. Watch for force closes. Any signs And go back to normal. Be very cautious overclocking that much
Sent from my Sensation 4G using xda premium
Its not overclocking, its trying to get one of the cellphone frequencies.
FG
realsis said:
Be careful, you don't want to ruin your device. Watch for overheating. Watch for force closes. Any signs And go back to normal. Be very cautious overclocking that much
Sent from my Sensation 4G using xda premium
Click to expand...
Click to collapse
i'm not talking about overclocking, it's the data modem, to put it simply, i need to be on AT&T frequencies but my phone is T-Mobile, and i've seen people change it according to their region. is it possible on the Sensation?
Well for starters the only way you would be able to operate on that frequency one your device has to be carrier free meaning unlocked from all gsm carrier's and this will allow your device to operate on that frequency meaning all you would have to do is swap sim cards if your device is carrier free and then you be able to put in AT&T sim card and reboot however you can't do this unless you are carrier free
sent from my sensation 4g using xda premium
The Sensation supports 850mhz for gsm. It does not support 850mhz or 1900mhz hspa (at least the us version does not support 1900 hspa, having aws instead).
So if you are using an att sim and want 850mhz, you would have to switch it to gsm only (although it'd only work with gsm anyway since att uses 850/1900 for hspa iirc, or maybe just 1900?).
Even then, it'd choose between 850 and 1900 depending on signal / area, etc.
ziddey said:
The Sensation supports 850mhz for gsm. It does not support 850mhz or 1900mhz hspa (at least the us version does not support 1900 hspa, having aws instead).
So if you are using an att sim and want 850mhz, you would have to switch it to gsm only (although it'd only work with gsm anyway since att uses 850/1900 for hspa iirc, or maybe just 1900?).
Even then, it'd choose between 850 and 1900 depending on signal / area, etc.
Click to expand...
Click to collapse
meaning my sensation is confined to EDGE speeds on said networks??
Compatible networks GSM/GPRS/EDGE
850 900 1800 1900 MHz
UMTS/HSPA
850 1900 2100 or 900 1700 2100 MHz
HSDPA 14.4 Mbps
HSUPA 5.76 Mbps
tmo version supports 900/1700/2100.
looks like the other version not available in america supports 850/1900/2100 for umts.
not sure if there's any difference in hardware or if it's defined in software (not a part that's included in ruu's).
ziddey said:
Compatible networks GSM/GPRS/EDGE
850 900 1800 1900 MHz
UMTS/HSPA
850 1900 2100 or 900 1700 2100 MHz
HSDPA 14.4 Mbps
HSUPA 5.76 Mbps
tmo version supports 900/1700/2100.
looks like the other version not available in america supports 850/1900/2100 for umts.
not sure if there's any difference in hardware or if it's defined in software (not a part that's included in ruu's).
Click to expand...
Click to collapse
Its a difference in hardware. The Canadian Bell version supports 850/1900 (AT&T Frequencies) You can use the T Mobile version but you will be limited to edge/2G only.