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I'm thinking about buying an unlocked Vibrant to use on AT&T, will the 3G work on AT&T network? Thanks.
Yes utilizing UMTS Band II 1900 MHz
lqaddict said:
Yes utilizing UMTS Band II 1900 MHz
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Actually, the rumor going around the internet that you can only use At&t 1900mhz on the Vibrant is false.
The vibrant can also utilize wcdma 850mhz. So you should have no problems picking up both 3G signals from At&t.
I will work on making a how to video that shows how to make the vibrant pick up the wcdma 850, takes litterly 2 minutes to do.
Remember, you might run into other annoying problems such as setting up visual voicemail to work with At&t.
SamsungVibrant said:
Actually, the rumor going around the internet that you can only use At&t 1900mhz on the Vibrant is false.
The vibrant can also utilize wcdma 850mhz. So you should have no problems picking up both 3G signals from At&t.
I will work on making a how to video that shows how to make the vibrant pick up the wcdma 850, takes litterly 2 minutes to do.
Remember, you might run into other annoying problems such as setting up visual voicemail to work with At&t.
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I saw Band V in the service menu, but I had no luck enabling it, so it seems; here in NYC ATT is using UMTS Band II and the Vibrant has no issues picking it up, I am getting upward to 3Mb/s down speeds
Here's an entire thread dedicated to it http://forum.xda-developers.com/showthread.php?t=735461 I was one of the non-believers until I tried an ATT SIM in my unlocked Vibrant.
lqaddict said:
I saw Band V in the service menu, but I had no luck enabling it, so it seems; here in NYC ATT is using UMTS Band II and the Vibrant has no issues picking it up, I am getting upward to 3Mb/s down speeds
Here's an entire thread dedicated to it http://forum.xda-developers.com/showthread.php?t=735461 I was one of the non-believers until I tried an ATT SIM in my unlocked Vibrant.
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Umm interesting thread, similar to what we are doing.
So are you saying you are not able to pick up the wcdma 850 (FDD V) band? We set this up on a friends phone, with his At&t sim, it works.
Can you try setting your phone to wcdma 850 only, and drive to a location that has 850 signal, then check under basic information, you should be getting at&t 850 3g.
vietphunguyen said:
I'm thinking about buying an unlocked Vibrant to use on AT&T, will the 3G work on AT&T network? Thanks.
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Dear Vietphunguyen, there seems to be controversy. We know for certain the vibrant can pick up att 3g signal using 1900 band, but the question is, what about 850. Me and a friend believe the vibrant can also get 850, but that link the other poster provided is something to note also.
Be safe, don't purchase the vibrant yet, until we test this more. 2 make sure you can pick up both 1900 and 850 bands.
I dont know much about the Vibrant just yet, but if its anything like the iPhone on TMO's towers, it might not work. The problem was with ATT using a single band for 3g (1900mhz) to send the recieve but TMO uses 2 bands, 1 to send and 1 to recieve... If this helps at all I dunno! lol
Apexsilverevo said:
I dont know much about the Vibrant just yet, but if its anything like the iPhone on TMO's towers, it might not work. The problem was with ATT using a single band for 3g (1900mhz) to send the recieve but TMO uses 2 bands, 1 to send and 1 to recieve... If this helps at all I dunno! lol
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Thank you, just to clarify, for people visiting this thread.
At&t uses 2 differend 3G bands, one is 1900mhz and the other is 850 mhz. At&t is starting to implement 850 towers. Naturally, you would want a phone that picks up both bands.
Now, we know for CERTAIN, the VIbrant will 100 percent pick up At&t 3G 1900mhz signals. The question is, which we are uncertain of, will the Vibrant also pick up 850mhz band 3G signal, incase you hapen to drive to an at&t area that only has this band.
clearer?
This may be stupid, but I can't find the answer in this forum.
I am drooling over the Titan, but am with T-mobile US and can't switch anytime soon.
If I buy a Titan 3rd party, can I use it for voice and data on T-mobile? Will I get full speed data?
Thanks.
You will get voice and data, but only 2G speeds. That goes for both the international version and att version.
Any info on some kind of quad band version that will work on both AT&T and T-Mobile?
pistol44 said:
Any info on some kind of quad band version that will work on both AT&T and T-Mobile?
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Titan is quad band according the htc.com
HSPA+/WCDMA 850/1900/2100MHz and Quad-band GSM/GPRS/Edge 850/900/1800/1900MHz
Shouldn't this work then? ATT's specs also say 850/1900/2100 MHz for HSPA/UMTS. T-mobile's HSPA/UMTS is on 1700/2100 MHz (according to Wikipedia). For the 2100 band, it should work, right? I am unsure as I am a simpleton and just comparing numbers and assuming that is all that has to match.
I would guess this would require an unlock.
T-Mobile uses both 1700 and 2100 bands for their 3G/HSPA+.
This is why it will not work.
I know because it pains me to not be able to get this device on T-Mobile.
wade_link said:
Shouldn't this work then? ATT's specs also say 850/1900/2100 MHz for HSPA/UMTS. T-mobile's HSPA/UMTS is on 1700/2100 MHz (according to Wikipedia). For the 2100 band, it should work, right? I am unsure as I am a simpleton and just comparing numbers and assuming that is all that has to match.
I would guess this would require an unlock.
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I tried, don't even think about it.
Go with AT&T GoPhone if you have Titan (Simfree), i am enjoying Unlimited All, (Call + Text + Web 4G ) with only $50 a month . Titan can get HSDPA+ (i think) on AT&T.
Im using the titan, unlocked on t-mobile and it does run on edge. honestly its not tooo terrible but edge sucks. and i cant get picture messages. idk i just might keep my hd7, sell this phone and wait for something better on t-mobile that i can actually use hahah but i love the giant screeen
Does this mean the Titan would get 3G or better on T-Mo US now?
http://www.phonearena.com/news/T-Mobiles-consolation-package-3-billion-7-year-3G-roaming-deal-128-AWS-markets_id24956
AT&T and T-Mobile UMTS Roaming Agreement
AT&T and T-Mobile agreed to roam on each other's UMTS bands for the next 7 years following the formal withdraw of AT&T's merger offer. As to when that becomes effective I do not know; I've yet to get an answer from either AT&T or T-Mobile on the subject and that's assuming they'll tell you; it takes an act of God to get through to AT&T's equivalent of T-Mobile's Tier 1,2 and 3 tech support. We have both AT&T and T-Mobile; and in the here and now, neither are compatible on each other's high speed bands; I have the Titan with AT&T and the Rhodium with T-Mobile; my Rhodium unlocked for use on AT&T and despite 3G in Columbus, GA and Auburn-Opelika, AL; I can only use Edge on AT&T. On my Titan it's either "E" or "4G", no 3G. What I have noticed is the Titan favors 4G and seeks those towers which is great if you're in the city, but rural; forget it. It's all Edge out here. It will hit the T-Mobile tower which is 4 bars in our Opelika location but immediately go to either no service or a 1 bar sometimes on 4G and others on Edge. We all know that "4G" isn't 4G and of course "Unlimited" isn't unlimited and politicians and marketing gurus think we're all stupid.
Ok guys I have an atrix 4g running on t-mobile. My question is why cant I get 4g/3g on this phone ? T-mobile runs on the 2100 band and the phone does support that band so why no 4g or 3g? common sense would tell me that if t-mo runs 4g on 2100 and the phone is capable of running on 2100 that it would work. have searched for a total of about 4 hours or so over the past couple days and cant find a straight answer only thing i can find is that att doesnt run on 2100 band yet the phone does. thanks in advance to anybody that can answer and taking the time to read.
are you getting H+ or H? (This is "3.5g") The Atrix 4g is not a true 4g phone.
Because the 2100 spectrum that you're using the phone on now is part of the quad-band gsm which is edge/2g. The difference lies in the bands used for 3g/4g, in which case AT&T only uses 850/1900 and tmobile only uses 1700/2100.
There is also a bunch of things that include HSPA, AWS, WCDMA, and so on and so on but I don't know enough about that to comment.
EDIT: Also, the only phones I know that can be used on both AT&T and Tmobile 3g/4g are "penta-band" phones like some European Nokia phones and the unlocked Galaxy Nexus that needs to be imported as well.
shattar01 said:
Ok guys I have an atrix 4g running on t-mobile. My question is why cant I get 4g/3g on this phone ? T-mobile runs on the 2100 band and the phone does support that band so why no 4g or 3g? common sense would tell me that if t-mo runs 4g on 2100 and the phone is capable of running on 2100 that it would work. have searched for a total of about 4 hours or so over the past couple days and cant find a straight answer only thing i can find is that att doesnt run on 2100 band yet the phone does. thanks in advance to anybody that can answer and taking the time to read.
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Wcdma=utms=3g
Yes, WCDMA and AWS(1700), as far as I know, are both from UMTS and the differences in regards to 3G between AT&T and Tmobile lie in the spectrum use (850&1900 vs 1700&2100). And both AT&T and Tmobile use HSPA(+) based off their respected UMTS frequencies.
I just don't understand the "leap" in GSM technology that breaks the quad-band compatibility, that's all.
matthew5025 said:
Wcdma=utms=3g
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Also I've read 850 is att's main spectrum for large areas and 900 for T-Mobile. All higher spectrums are for smaller, rural areas.
If your looking for 3g maybe find a town or, buy a dual band amplifier? That's IF they have 2100 MHz band working where you are located.
Lower bands ie 850/900 are the download streams. 1700/1900/2100 are upload streams. If I'm not mistaken
Also a T-Mobile vibrant supports att, it also has our main band, 850mhz. Again which is the main large areas, like T-Mobile 900mhz. 1700-2100mhz for att/T-Mobile range is only as good as the towns that still has that band currently operating for hspa/3g data. I've seen alot of T-Mobile phones that have 850/1900/2100, and work on att. If they were 1600/1900/2100 did not for me.
You need that lower frequencies to ensure it to work. Then....
Also for regional based frequencies...
http://en.m.wikipedia.org/wiki/Universal_Mobile_Telecommunications_System
That link will let you know what that all really means.
I think you are mixing up gsm and umts.
GSM = 2G/Edge
UMTS (HSPA, HSPA+, HSDPA/HSUPA, WCDMA, AWS) = 3G
Have a look here. You will see they label "3G" as "UMTS" which is HSPA/WCDMA. A little more down you can see they label their data as "HSDPA", which is download, and "HSUPA" which is upload. Further delineating the speeds they label either one as UMTS for down and Edge as up, which to me tells me they use gsm for the upload and only use UMTS for download. Either way, there is not a T-mobile phone available that can be unlocked and used on AT&T's 3G, just 2G and vice versa. As I have previously mentioned, you will need a penta-band phone for that.
Ciloteille said:
Also I've read 850 is att's main spectrum for large areas and 900 for T-Mobile. All higher spectrums are for smaller, rural areas.
If your looking for 3g maybe find a town or, buy a dual band amplifier? That's IF they have 2100 MHz band working where you are located.
Lower bands ie 850/900 are the download streams. 1700/1900/2100 are upload streams. If I'm not mistaken
Also a T-Mobile vibrant supports att, it also has our main band, 850mhz. Again which is the main large areas, like T-Mobile 900mhz. 1700-2100mhz for att/T-Mobile range is only as good as the towns that still has that band currently operating for hspa/3g data. I've seen alot of T-Mobile phones that have 850/1900/2100, and work on att. If they were 1600/1900/2100 did not for me.
You need that lower frequencies to ensure it to work. Then....
Also for regional based frequencies...
http://en.m.wikipedia.org/wiki/Universal_Mobile_Telecommunications_System
That link will let you know what that all really means.
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And don't get me wrong, I'm not trying to give anyone a hard time but it's misinformation to tell anyone that a T-mobile phone can work on AT&T 3G.
And I'll say it again, I'm not an expert so if anyone can better explain then I'm all ears (eyes).
live4nyy said:
I think you are mixing up gsm and umts.
GSM = 2G/Edge
UMTS (HSPA, HSPA+, HSDPA/HSUPA, WCDMA, AWS) = 3G
Have a look here. You will see they label "3G" as "UMTS" which is HSPA/WCDMA. A little more down you can see they label their data as "HSDPA", which is download, and "HSUPA" which is upload. Further delineating the speeds they label either one as UMTS for down and Edge as up, which to me tells me they use gsm for the upload and only use UMTS for download. Either way, there is not a T-mobile phone available that can be unlocked and used on AT&T's 3G, just 2G and vice versa. As I have previously mentioned, you will need a penta-band phone for that.
And don't get me wrong, I'm not trying to give anyone a hard time but it's misinformation to tell anyone that a T-mobile phone can work on AT&T 3G.
And I'll say it again, I'm not an expert so if anyone can better explain then I'm all ears (eyes).
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I am just merely stating that I have a motorola defy on ATT, and it worked great for a long time with great speeds before I got a motorola atrix and infuse.
Im not saying that every tmobile phone will have working talk/text, or data for that matter. I have just posted an idea, or atleast what to look for when you are cruising for phones not labeled for your carrier.
I was getting my motorola defy with the att "grand fathered internet" for 10 dollars a month and it was about 160-420KB/s down, and 80-190KB/s up. but some phones are capable of this, others arent. I have a general idea, and have played with several different carrier cellphones and used them with att and att's 3g data.
Rogers HTC Dream (x2 of them)
Telus Milestone
Tmobile Defy
Rogers Atrix
ATT Atrix (x2 of them)
ATT Infuse
Rogers and Telus actually use the same 3G bands as AT&T so as long as those are unlocked they will work. And I'm not saying an unlocked T-mobile can't work on AT&T, because they can (they both use quad-band gsm) but you can not use an unlocked T-mobile phone an AT&T 3G. That's all I'm saying.
Now, they did make an European version of the Defy that uses the 850 3G band but not the T-mobile "branded" one.
I'm going to stick to my guns on this one because I don't want to give anyone the wrong idea about interchanging AT&T and T-mobile phones and expecting 3G service. I'm fairly certain about this and unless someone can prove otherwise that's how I will think.
Ciloteille said:
I am just merely stating that I have a motorola defy on ATT, and it worked great for a long time with great speeds before I got a motorola atrix and infuse.
Im not saying that every tmobile phone will have working talk/text, or data for that matter. I have just posted an idea, or atleast what to look for when you are cruising for phones not labeled for your carrier.
I was getting my motorola defy with the att "grand fathered internet" for 10 dollars a month and it was about 160-420KB/s down, and 80-190KB/s up. but some phones are capable of this, others arent. I have a general idea, and have played with several different carrier cellphones and used them with att and att's 3g data.
Rogers HTC Dream (x2 of them)
Telus Milestone
Tmobile Defy
Rogers Atrix
ATT Atrix (x2 of them)
ATT Infuse
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---------- Post added at 08:47 AM ---------- Previous post was at 08:36 AM ----------
Upon further research, I have found this article, where under certain circumstances, you can use an unlocked AT&T iPhone with T-mobile 3G:
http://www.gsmarena.com/tmobile_usa_running_1900mhz_3g_in_some_areas_iphones_invited-news-3537.php
Now, this shows that an AT&T phone can maybe use T-mobile 3G but not the other way around. Again, I'm always up for learning something new but I need references/proof.
Well I do get att 3g on the defy and vibrant. I am currently getting about 300ish KB/s on them and 600+KB/s on my attic, I'm just going with the facts. Those facts are that certain T-Mobile phones will work with Att, provided they have 850mhz band. That allows you in most towns (near me) to get 3g
False.
300KB/s is Edge speed, which is only 2G.
http://en.wikipedia.org/wiki/2G
http://www.phonescoop.com/glossary/term.php?gid=107
That's why you get faster speeds on the Atrix because it actually uses 3G.
Again, both AT&T and T-mobile use quad-band GSM. Which is why you can unlock a T-mobile phone and use it on AT&T, and vice versa, but it is only 2G/Edge and NOT 3G.
http://www.phonescoop.com/glossary/term.php?gid=139
http://www.phonescoop.com/glossary/term.php?gid=3
Furthermore, here are the wiki pages for AT&T and T-mobile which both inlcude frequency charts outlining the technology (2G or 3G) each one uses:
http://en.wikipedia.org/wiki/AT&T_Wireless
http://en.wikipedia.org/wiki/T-Mobile_USA
Here are the charts:
AT&T:
Frequency Protocol Class
Frequencies used on the AT&T Network
850 MHz GSM/GPRS/EDGE 2G
1900 MHz GSM/GPRS/EDGE 2G
850 MHz UMTS/HSPA 3G
1900 MHz UMTS/HSPA 3G
700 MHz LTE 4G
T-mobile:
Frequency Band Protocol
850 MHz GSM/GPRS/EDGE 2G
1900 MHz GSM/GPRS/EDGE 2G
1700 MHz UMTS (W-CDMA)/HSPA/HSPA+ 4G (formerly 3G[34])
1900 MHz UMTS (W-CDMA)/HSPA/HSPA+ 4G
I check for facts and references, I'm only saying what I find in research.
Again, when unlocked, a T-mobile phone can use AT&T 2G/Edge, not 3G
Ciloteille said:
Well I do get att 3g on the defy and vibrant. I am currently getting about 300ish KB/s on them and 600+KB/s on my attic, I'm just going with the facts. Those facts are that certain T-Mobile phones will work with Att, provided they have 850mhz band. That allows you in most towns (near me) to get 3g
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I know the Jetstream was designed to be run on AT&T and Rogers, but I am curious if it is possible to flash a radio to enable usage of T-Mobile's HSPA network, much like the Samsung Galaxy Note has been enabled to, as seen here.
Can any of the amazing Devs out there shed some light on this?
jdavis08 said:
I know the Jetstream was designed to be run on AT&T and Rogers, but I am curious if it is possible to flash a radio to enable usage of T-Mobile's HSPA network, much like the Samsung Galaxy Note has been enabled to, as seen here.
Can any of the amazing Devs out there shed some light on this?
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jdavis08, Simple answer is yes. It is a standard 2G / 3G / LTE (AT&T / AWS band) phone. So you can use it on ANY 2G / 3G / LTE network with a SIM. But you may need to break the SIM Lock on any handset.
Just wanted to clarify. The Jetstream is 2G/3G/LTE /capable, 2G (GSM): 850/900/1800/1900MHz, 3G (UMTS/HSPA): 850/1900/2100, and LTE: 700mhz & AWS-1700/2100.
Currently, T-Mobile only uses the AWS for their HSPA+ network, not LTE (from what I understand, AWS will be transitioned for LTE and 1900mhz refarmed for 3G/4G early 2013) - and if I'm not mistaken, the HSPA+ is only supported by the "3G" band of this device, not the "LTE"
So - to make a long story short. I am a T-Mobile subscriber with various "4G" phones from T-Mobile. Their 4G only works if the phone has a radio with AWS for HSPA as T-Mobile (unlike AT&T) does not use the 1900mhz for their HSPA (yet). I own this tablet.. It has been SIM unlocked and it simply does not get anything above EDGE... and I live near and visit major cities in Washington State, Seattle/Bellevue/Tacoma, which definitely have TMo's 4G coverage.
I know I should just cool my jets until TMo rolls out the network upgrades, as I have no interest in joining AT&T. I was just curious if there was some way to "trick" the phone to use the AWS frequencies for HSPA, like the Galaxy Note has been made to do as the radio specs are identical.
I know that the Note was enabled to do this by flashing another radio. Support is minimal for the Jetstream these days... so I was just reaching out.
Thanks guys
Is there an app or command to log the different frequency bands available in an area? I'm thinking of getting a Galaxy Note 2, but the Note 2 doesn't support the 1700MHz frequency band, and I'm on T-mobile. Any way to figure out if the new phone will get reception, other than just plonking down ~$650 and hoping for the best?
TheEyes said:
Is there an app or command to log the different frequency bands available in an area? I'm thinking of getting a Galaxy Note 2, but the Note 2 doesn't support the 1700MHz frequency band, and I'm on T-mobile. Any way to figure out if the new phone will get reception, other than just plonking down ~$650 and hoping for the best?
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You will have EDGE coverage anywhere, but I wouldn't buy an expensive new phone that doesn't support 3G for your carrier.
Why aren't you buying via T-Mobile, that does support their speeds?
https://www.t-mobile.com/shop/phone...ll-phone=Samsung-Galaxy-Note-II-Titanium-Gray
stevedebi said:
You will have EDGE coverage anywhere, but I wouldn't buy an expensive new phone that doesn't support 3G for your carrier.
Why aren't you buying via T-Mobile, that does support their speeds?
https://www.t-mobile.com/shop/phone...ll-phone=Samsung-Galaxy-Note-II-Titanium-Gray
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First, because the phone is at least $70 more expensive on T-mobile's store.
Second, even that version of the phone does not do HSPA+ over 1700 MHz (it's actually the same N7100 you see everywhere). The trick is, T-mobile is supposedly switching all of their 1700-band HSPA+ towers to 1900 band, partly in preparation for their LTE rollout and partly because that's the only way they'll be able to get the iPhone to work with their network, but they haven't gotten it done everywhere and I'm concerned that I'll plop down ~$600 on a phone that only gets 2G speeds at work.
TheEyes said:
First, because the phone is at least $70 more expensive on T-mobile's store.
Second, even that version of the phone does not do HSPA+ over 1700 MHz (it's actually the same N7100 you see everywhere). The trick is, T-mobile is supposedly switching all of their 1700-band HSPA+ towers to 1900 band, partly in preparation for their LTE rollout and partly because that's the only way they'll be able to get the iPhone to work with their network, but they haven't gotten it done everywhere and I'm concerned that I'll plop down ~$600 on a phone that only gets 2G speeds at work.
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You had me worried so I looked it up. According to the news sources I found, T-Mobile is converting it's 1900 2g towers to support HSPA+. So for the present the current 3G network is not in danger. I suppose my Amaze will continue working for a while!
Where did you see a report that they are changing out the 1700 band HSPA+ towers?
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"In May, T-Mobile's chief technology officer Neville Ray said the company would be repurposing its existing 1900MHz 2G service with 4G HSPA+, in order to "provide customers with the ability to use a broader range of devices, including the iPhone, on T-Mobile's 4G network.""
http://appleinsider.com/articles/12...nvert_its_4g_network_to_support_apples_iphone
stevedebi said:
You had me worried so I looked it up. According to the news sources I found, T-Mobile is converting it's 1900 2g towers to support HSPA+. So for the present the current 3G network is not in danger. I suppose my Amaze will continue working for a while!
Where did you see a report that they are changing out the 1700 band HSPA+ towers?
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"In May, T-Mobile's chief technology officer Neville Ray said the company would be repurposing its existing 1900MHz 2G service with 4G HSPA+, in order to "provide customers with the ability to use a broader range of devices, including the iPhone, on T-Mobile's 4G network.""
http://appleinsider.com/articles/12...nvert_its_4g_network_to_support_apples_iphone
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Almost every tech news site that discusses the 1900 band refarming mentions that the reason is to re-deploy 1700 for LTE (that, and to get the iPhone running on T-mobile because Apple outright refuses to make the iPhone pentaband for some reason). It's a fairly easy Google away.
TheEyes said:
Almost every tech news site that discusses the 1900 band refarming mentions that the reason is to re-deploy 1700 for LTE (that, and to get the iPhone running on T-mobile because Apple outright refuses to make the iPhone pentaband for some reason). It's a fairly easy Google away.
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The link I provided quoted a t-mobile representative. And I got it from a Google search...
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