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[Q] Samsung Vibrant 4G SPECIFICATIONS

I know the original vibrant was a pentaband phone, supporting AT&T's 850/1900 networks as well as t-mobiles 3g networks....
Can anyone confirm the 3g bands on the new Vibrant 4g?
Will there be fast 3g 21mbps for 850/1900 on the modem chip also? ( or 4g whatever you want to call it, in my book its just faster 3g..)
someone enter the debug screen and check which bands are available...
cheers!

stealthj said:
I know the original vibrant was a pentaband phone, supporting AT&T's 850/1900 networks as well as t-mobiles 3g networks....
Can anyone confirm the 3g bands on the new Vibrant 4g?
Will there be fast 3g 21mbps for 850/1900 on the modem chip also? ( or 4g whatever you want to call it, in my book its just faster 3g..)
someone enter the debug screen and check which bands are available...
cheers!
Click to expand...
Click to collapse
How do I get to the debug screen? *#*#4636#*#* gives me WCMDA/GSM under phone info
Sent from my SGH-T959V using XDA App

stealthj said:
I know the original vibrant was a pentaband phone, supporting AT&T's 850/1900 networks as well as t-mobiles 3g networks....
Can anyone confirm the 3g bands on the new Vibrant 4g?
Will there be fast 3g 21mbps for 850/1900 on the modem chip also? ( or 4g whatever you want to call it, in my book its just faster 3g..)
someone enter the debug screen and check which bands are available...
cheers!
Click to expand...
Click to collapse
Curious about this as well. Currently using a vibrant on at&t...
Sent from my SGH-T959 using Tapatalk

stealthj said:
I know the original vibrant was a pentaband phone, supporting AT&T's 850/1900 networks as well as t-mobiles 3g networks....
Can anyone confirm the 3g bands on the new Vibrant 4g?
Will there be fast 3g 21mbps for 850/1900 on the modem chip also? ( or 4g whatever you want to call it, in my book its just faster 3g..)
someone enter the debug screen and check which bands are available...
cheers!
Click to expand...
Click to collapse
HSPA+ 21 only works with T-mobile, AT&T doesn't use an AWS band, in this case is 1700/2100Mhz.
Someone may have been able to 'trick' the vibrant into using a basic UMTS band on AT&T, but I never heard of it, let alone heard that the Vibrant supported AT&T 3G. The Vibrant has GSM.support for them (2G), I haven't seen anything else.
Where's the supporting documents that people have been getting At&t 3G with a T-Mobile Vibrant?
Sent from my HTC Vision using XDA App

TheMan42 said:
HSPA+ 21 only works with T-mobile, AT&T doesn't use an AWS band, in this case is 1700/2100Mhz.
Someone may have been able to 'trick' the vibrant into using a basic UMTS band on AT&T, but I never heard of it, let alone heard that the Vibrant supported AT&T 3G. The Vibrant has GSM.support for them (2G), I haven't seen anything else.
Where's the supporting documents that people have been getting At&t 3G with a T-Mobile Vibrant?
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
Trust me.... I'm using a vibrant on at&t with 3g. It does support the wcdma 1900 band. There is alot of evidence of this...heck engadget made a post about this... google it!
Edit: What I was trying to ask is if the galaxy s 4g supports the 1900 wcdma that the original vibrant supported....
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Not sure how I could check unless i unlocked it..
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princedwi said:
Not sure how I could check unless i unlocked it..
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Click to collapse
That would work....hopefully the galaxy s 4g can be unlocked the same way the previous galaxy s phones could.

In my research I have found that 4G is not backwards compatable with 3G. Someware I read that companys are putting 3G and 4G chips on the new 4G phones to bridge the gap between the 3G chip ability to handle voice and the 4G chip being able to handle data. I can't say for sure if SGS4G has both chips. It's a know issue that the 3G SGS misses calls when connected to a laptop because It does not handle data well in combination with voice. That's why I upgraded to the 4G. I don't think Its going to make a lot of difference until TM gets their HW in place with a backbone that can support it.

Samsung Galaxy S 4G 1900 MHz WCDMA
I bought my Samsung Galaxy S 4G at a T-Mobile store in San Francisco. I subsequently upgraded it to the latest firmware provided by T-Mobile using Samsung Kies.
I usually use WCDMA only mode because GSM causes awful buzzing sound when I use it in my car (I have a FM transmitter connected to my phone).
Anyways, I was curious to see if I'd see AT&T, so I searched for network (still under WCDMA Only mode), and it found both AT&T and T-Mobile.
I pressed *#197328640# in the dialer, and then went to the debug screen/band selection to look at available bands, and it actually does have 1900 WCDMA.
It shows
GSM 850, 900, 1800, 1900, WCDMA 2100 (FDD I), WCDMA 1700 (FDD IV), WCDMA 1900(FDD II).
I don't know if AT&T SIM would work since my phone is locked but I can report back once I get it unlocked.

EDIT: Reading an old post of mine, I realized that my memory played a bad trick on me. My tests DID work on 1900 WCDMA and DID NOT work on 850 WCDMA, just opposite to what I wrote earlier in this post. --sorry
fm219 said:
...Anyways, I was curious to see if I'd see AT&T, so I searched for network (still under WCDMA Only mode), and it found both AT&T and T-Mobile.
I pressed *#197328640# in the dialer, and then went to the debug screen/band selection to look at available bands, and it actually does have 1900 WCDMA.
It shows
GSM 850, 900, 1800, 1900, WCDMA 2100 (FDD I), WCDMA 1700 (FDD IV), WCDMA 1900(FDD II).
I don't know if AT&T SIM would work since my phone is locked but I can report back once I get it unlocked.
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Click to collapse
I don't think it would work. For reference, here is a side by side band comparison between my Vibrant (tested 3G on AT&T) and my coworker's SGS 4G (locked, untested).
The essential band here is the 850 1900 WCDMA, but the "overflow" 850 WCDMA is missing and I couldn't make it work anyways (I'm in Houston, maybe it is not switched on here).

My understanding is that AT&T usually uses 1900MHz for 3G, and in certain cities where they don't have enough bandwidth in 1900 MHz like NYC and SF, they use 850MHz.. so you could still get by with only 1900 MHz, no?

EDIT: Reading my old post, my memory played a bad trick on me. My test DID work on 1900 and DID NOT work on 850, just opposite to what I wrote earlier on this post.
fm219 said:
My understanding is that AT&T usually uses 1900MHz for 3G, and in certain cities where they don't have enough bandwidth in 1900 MHz like NYC and SF, they use 850MHz.. so you could still get by with only 1900 MHz, no?
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Yep, thats what I have heard as well. Now one thing of note. When I tested my Vibe, it only worked on the 850 1900 WCDMA band. Could not make it work on the 850 no matter how hard I tried. I'm in Houston for that matter and maybe this 850 WCDMA is not enabled here.
This was my test: http://forum.xda-developers.com/showpost.php?p=9958501&postcount=14

fosormic said:
EDIT: Reading an old post of mine, I realized that my memory played a bad trick on me. My tests DID work on 1900 WCDMA and DID NOT work on 850 WCDMA, just opposite to what I wrote earlier in this post. --sorry
I don't think it would work. For reference, here is a side by side band comparison between my Vibrant (tested 3G on AT&T) and my coworker's SGS 4G (locked, untested).
The essential band here is the 850 1900 WCDMA, but the "overflow" 850 WCDMA is missing and I couldn't make it work anyways (I'm in Houston, maybe it is not switched on here).
Click to expand...
Click to collapse
I'm currently unlocked on AT&T and i'm on 3G. I ALWAYS have an issue with upload speeds, but otherwise download speeds are just fine.
I attached four photos, of the available bands with my CURRENT galaxy S 4G unlocked on AT&T.
Also, a speed test I ran. That download speed is WAY higher than average because it was taken when the network was under the lightest usage possible, late at night.

Oh wow, over 5Mbps download on AT&T?
Are you on AT&T's 4G (HSPA+) or 3G?
I'm supposedly on T-Mobile 4G (my phone shows 4G when I download/upload), but I don't ever get 5Mbps. I get usually something around 2~3Mbps down and 1Mbps upload. I'm in the Bay Area.
I went into phone debug page, and one of the screens says HSDPA[0], HSUPA[0]. It also says network status: HSDPA (sorry I don't have the exact info on me right now).
Am I really just on HSDPA, not HSPA+? Is there a definite way to find out what my phone is using? Thank you.

fm219 said:
Oh wow, over 5Mbps download on AT&T?
Are you on AT&T's 4G (HSPA+) or 3G?
I'm supposedly on T-Mobile 4G (my phone shows 4G when I download/upload), but I don't ever get 5Mbps. I get usually something around 2~3Mbps down and 1Mbps upload. I'm in the Bay Area.
I went into phone debug page, and one of the screens says HSDPA[0], HSUPA[0]. It also says network status: HSDPA (sorry I don't have the exact info on me right now).
Am I really just on HSDPA, not HSPA+? Is there a definite way to find out what my phone is using? Thank you.
Click to expand...
Click to collapse
Technically I'm on HSPA+, though this phone doesn't even cover all of the "necessary" bands.
Look, to edit what bands you're on go into the market and download SGS Tools.
Then, go into the first line (Secret Codes) and hit Band Selection.
I'm on AT&T so I'm not sure what bands you need, but you can manually select them in there.
To check the band you're on, go to GSM Status in the "Secret Codes" page again.
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Oh I know I'm on 1700/2100 MHz because that's the only frequency (AWS) that T-Mobile uses for WCDMA/UMTS/4G/3G.
I downloaded Phono, and it says Network Type is HSDPA. Shouldn't it say HSPA+? I'm just wondering if there's an easy way to tell if I'm really on 4G (aka HSPA+) as opposed to 3G.
I actually messed around with debug settings last night so I'm worried that I screwed it up....
Thank you!

fm219 said:
Oh I know I'm on 1700/2100 MHz because that's the only frequency (AWS) that T-Mobile uses for WCDMA/UMTS/4G/3G.
I downloaded Phono, and it says Network Type is HSDPA. Shouldn't it say HSPA+? I'm just wondering if there's an easy way to tell if I'm really on 4G (aka HSPA+) as opposed to 3G.
I actually messed around with debug settings last night so I'm worried that I screwed it up....
Thank you!
Click to expand...
Click to collapse
Which debug settings did you change?
And as for Phono (which I've never even heard of/used until now), my phone says HSDPA as well, which, quite frankly, makes no sense. I guess you can technically get speeds of around 5MBPS on HSDPA but it's not typical.
You should easily be able to tell whether you're on HSDPA or HSPA+ with the 4G/3G connectivity icon. in your status bar.
Now, I'm no expert, but hopefully that answers your question.

I played around with GCF settings. When I go into debug mode, there was something about choosing Rel.6 or Rel.5 or cancel settings.. And then also, if you do *#3214789#, you can enable/disable GCF Mode.. which I have no idea what it is about....
Thanks!

fm219 said:
I played around with GCF settings. When I go into debug mode, there was something about choosing Rel.6 or Rel.5 or cancel settings.. And then also, if you do *#3214789#, you can enable/disable GCF Mode.. which I have no idea what it is about....
Thanks!
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Click to collapse
Hmm...that's awfully strange.....
I can't find anything about it anywhere....
Try restoring using ODIN yet?
I mean, if the phone is that messed up since you messed with that setting.

I put my friends att sim in my unlocked sgs4g to test and the 3g sign came up by the bars as well as the att operator logo didn't really test out speeds but im guessing that the 3g sign wouldn't have came up unless it was really picking up that frequency.

No 3G or 4G connection

I have just 2G speed (checked by speedtest) with my Atrix 2!
As you know switcher 2G/3G is disabled on our phone!
I certainly have 3G on my account, I checked my SIM card with other phone and other SIM card with Atrix 2 and got just E icon (2G).
Any ideas???

did u check ur service provider does support the A2 3g frequency??? you need 850 / 1900 / 2100 either one of them to get 3g or 4g Speed.

athris said:
did u check ur service provider does support the A2 3g frequency??? you need 850 / 1900 / 2100 either one of them to get 3g or 4g Speed.
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I use USA T-Mobile.
So does it mean that AT&T Phones don't support 3G or 4G T-Mobile Internet even if unlocked?

From what I remember from the ATRIX forums is they use the same frequencies but with a AT&T phone on T-Mobile u will only have Edge or 2G speeds. No 3G or Hspa+

JRW 28 said:
From what I remember from the ATRIX forums is they use the same frequencies but with a AT&T phone on T-Mobile u will only have Edge or 2G speeds. No 3G or Hspa+
Click to expand...
Click to collapse
Could you provide with links?
I'm going to return phone if this case .
If I root phone will I get 3G?

yup, as far as u know Tmobile USA only support 1700 but atrix 2 doesn't support that so you wont get 3g from it.
Also you wont get 3g even u root it, root doesn't do anything with the hardware.

athris said:
yup, as far as u know Tmobile USA only support 1700 but atrix 2 doesn't support that so you wont get 3g from it.
Click to expand...
Click to collapse
It is said that tmobile supports 1700/2100 Mhz for 3G in wiki and Atrix 2 supports 2100 Mhz.

I think that's 2100 MHz is not the real 2100 band. It means 1700 download and 2100 upload. For more information, i think it is better to ask those peoples who are using tmobile usa.

I haven't run across any AT&T phone so far that works with T-mobile on anything but EDGE.

I think the galaxy s2 can. Someone has 3g ln there T-Mobile gs2. And they get better speeds lol
gunnyman said:
I haven't run across any AT&T phone so far that works with T-mobile on anything but EDGE.
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Click to collapse
Sent from my SAMSUNG-SGH-I777 using XDA App

T-Mobile uses 1700Mhz/2100Mhz for UMTS/HSPA.
Like AT&T, they have 4 total bands for coverage, they do not use 1700 down and 2100 up. You pick either one. TMobile has a big disadvantage here, since with out a low frequency to carry hspa, they don't get any where close to the footprint per tower AT&T does.
Frankly TMobile is odd-man out in the US, and I am really surprised they have as many subscribers as they do.
All that said, my question is: How did you unlock an Atrix 2?

Any Att Phone or Unlock Phone with tmobile 3g?

Ok i have a tmobile s2 and a att unlock lg thrill, i plan to tether with my s2 but tmobile makes you pay a fee each month so i cant do that, recently i put my tmobile sim card in the att lg thrill and i decided to try and tether from the thrill and it was able to work but only with edge speed. So im just wondering if there's any phone out there that can get tmobile 3g but it's not tmobile branded, basically is there any cheap pentaband phones out there?
i would love to get a pentaband phone to tether... i like getting more phones but i would consider to try and root my s2 if i have too, i suck at rooting phones xD

It doesn't matter which phone you use. T-mobile can see how much data you're using and recommend (or force) you to have the tethering plan.
Btw, loved the Thrill, great phone.

KayxGee1 said:
It doesn't matter which phone you use. T-mobile can see how much data you're using and recommend (or force) you to have the tethering plan.
Btw, loved the Thrill, great phone.
Click to expand...
Click to collapse
that only happens on my tmobile s2, tmobile directs you to a page to get the tethering plan. When i tether with the thrill, tmobile doesnt direct me to tethering page so basically i can tether with the thrill.

If you use ATT phone on T-Mobile 3G network, you will likely be getting EDGE speed only as most ATT phones only work with dual-band UMTS 850/1900. T-Mobile 3G/4G network operates on UMTS 1700/2100, as I vaguely recalled.
For ATT, UMTS 850 is the dominant band for 3G/4G network. UMTS 1900 only works with a very limited coverage. That is the main reason that most overseas phones failed to obtain 3G+ data speed on ATT network as most of them are dual-UMTS 900/2100 or tri-UMTS 900/1800/2100.
I have never been a customer on T-Mobile, but it has been alleged that UMTS1700 is the dominant band on T-mobile 3G/4G network. If that is indeed true, then it is close to impossible to get any 3rd-party unlocked phones to work with T-mobile 3G/4G network. While UMTS2100 is very common on overseas phones, UMTS1700 is close to non-existance other than the phones subsidized by T-Mobile.
UMTS850 is hard to get by, but not as hard as UMTS1700.
This is the trick for mobile carriers to lock in their customers.

GSM version of the Galaxy Nexus should work. It has 850, 900, 1700, 1900 and 2100 bands.

adelmundo said:
GSM version of the Galaxy Nexus should work. It has 850, 900, 1700, 1900 and 2100 bands.
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Click to collapse
yeah the nexus should work but it's too expensive for me haha
Sent from my SGH-T989 using xda premium

Then the GSM version of the Nexus S...900, 1700, 2100, but then again T-Mo has a version of Nexus S already I believe.

adelmundo said:
Then the GSM version of the Nexus S...900, 1700, 2100, but then again T-Mo has a version of Nexus S already I believe.
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Click to collapse
oh my bad, i meant the galaxy nexus, i forgot the galaxy part
Sent from my SGH-T989 using xda premium

jiayu g2

Purchased a Jiayu g2 to play with so far the phone is very nice. It is suppose to work with 850/900/1900/2100mhz wcdma however I cannot get it to work on 3g with att I only get edge and have tried just about every apn setting I can. Does anyone else in the US have this phone working on 3g? I have it rooted. Funny never thought I would say this but it is a very nice phone.

eaa628 said:
Purchased a Jiayu g2 to play with so far the phone is very nice. It is suppose to work with 850/900/1900/2100mhz wcdma however I cannot get it to work on 3g with att I only get edge and have tried just about every apn setting I can. Does anyone else in the US have this phone working on 3g? I have it rooted. Funny never thought I would say this but it is a very nice phone.
Click to expand...
Click to collapse
A lot of these Chinese phones state they're quadband GSM, but only have 2100 for 3G. Correct me if I am wrong.
Also, do you accidentally have GSM Only set?
Sent from my iPad using Tapatalk HD

KayxGee1 said:
A lot of these Chinese phones state they're quadband GSM, but only have 2100 for 3G. Correct me if I am wrong.
Also, do you accidentally have GSM Only set?
Sent from my iPad using Tapatalk HD
Click to expand...
Click to collapse
here is the link for google translate.
http://translate.google.com/translate?hl=en&sl=zh-CN&tl=en&u=http://www.ejiayu.com/Product-5.html
this is the manufactures website and in the product parameters tab it shows 850/900/1900/2100 wcdma 3g and even in the engineermode menu it has them listed. i only paid 160 for it but to be honest it is a real nice phone and i was completely shocked at how well it was constructed. i even have it rooted. if there is anyone else out there that has this phone in the US or anywhere i would be interested to find out what bands you are on.

Take a look at the specshere
It shows 2100MHz for 3G
Don't be fooled by Engineering mode. It may show the options for specific MHz, but if the phone doesn't support it then the options pointless and misleading.
Sent from my iPad using Tapatalk HD

KayxGee1 said:
Take a look at the specshere
It shows 2100MHz for 3G
Don't be fooled by Engineering mode. It may show the options for specific MHz, but if the phone doesn't support it then the options pointless and misleading.
Sent from my iPad using Tapatalk HD
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Click to collapse
i hear what you are saying. but the fact that the manufacture website shows the bands. i understand that the selling sites are all diff some show 2100 some show 850/2100. but for 160 it was worth a shot.

So no one else in north America has this phone?

Hi,
I have heard that MTK6575 SoC does support 3G on 850MHz/1900MHz. Two things might prevent it from working.
1. Your cellular provider maynot be providing 3G on both 850 and 1900 where you live. It could just be on 1900MHz where you live. Could you go to some other part of the city and test it?
2. I have read that the antennae required for 850/1900MHz is different from 2100MHz. So, even if the SoC supports it, the signal strength is not strong enough to make it work.
I would be very interested in your test results since I am thinking of buying one.

KayxGee1 said:
A lot of these Chinese phones state they're quadband GSM, but only have 2100 for 3G. Correct me if I am wrong.
Also, do you accidentally have GSM Only set?
Sent from my iPad using Tapatalk HD
Click to expand...
Click to collapse
Because China Unicom 3G is @ WCDMA 2100MHz.
Sent from my GT-S5570 using xda premium

eaa628 said:
Purchased a Jiayu g2 to play with so far the phone is very nice. It is suppose to work with 850/900/1900/2100mhz wcdma however I cannot get it to work on 3g with att I only get edge and have tried just about every apn setting I can. Does anyone else in the US have this phone working on 3g? I have it rooted. Funny never thought I would say this but it is a very nice phone.
Click to expand...
Click to collapse
Hi! Did you insert your 3G SIM on the SIM 1 slot? It is the only SIM slot capable of 3G (WCDMA). There are two slots in Jiayu G2 and only SIM 1 will work with 3G. SIM 2 is for GSM only.

toffzter said:
Hi! Did you insert your 3G SIM on the SIM 1 slot? It is the only SIM slot capable of 3G (WCDMA). There are two slots in Jiayu G2 and only SIM 1 will work with 3G. SIM 2 is for GSM only.
Click to expand...
Click to collapse
yes i did. i have even tried to get help from Ejiayu.com and no one replies. the spec on the their website show is is 850/900/1900/2100 mhz wdma and it shows in the engineering menu as well but i think it is a lie i can not get it to work at all in 3g. My sim works fine in my Pantech Burst 4g LTE. i have not given u completely but i need someone who has an in depth knowledge of this phone to help

3g access
eaa628 said:
Purchased a Jiayu g2 to play with so far the phone is very nice. It is suppose to work with 850/900/1900/2100mhz wcdma however I cannot get it to work on 3g with att I only get edge and have tried just about every apn setting I can. Does anyone else in the US have this phone working on 3g? I have it rooted. Funny never thought I would say this but it is a very nice phone.
Click to expand...
Click to collapse
u might try and see what the apn setting is
u might have to input the correct apn for your carrier

Can Nexus S support 3G band 850, 1900MHz

I checked the spec. of Nexus S is only supported 3G band 900, 1700, 2100MHz.
Can Nexus S support 3G network (HSDPA) 850 and 1900MHz?

psphknxp said:
I checked the spec. of Nexus S is only supported 3G band 900, 1700, 2100MHz.
Can Nexus S support 3G network (HSDPA) 850 and 1900MHz?
Click to expand...
Click to collapse
http://bit.ly/NZEpk3

<DELETED>

kwudude said:
There are actually multiple versions of the Nexus S with different bands
See this link for a table of the different models and their bands.
If you want the simple version, though, the only Nexus S variant with 850/1900 support is the GT-i9020A
Click to expand...
Click to collapse
Absolutely aware of this. This superb search, powered by Google, gives you that answer in the first link. Information on both the T-Mo and AT&T variant.

<DELETED>

So if I have at&t service and I get the i9020a I should get 3g service?
Sent from my Barnes & Noble Nook Tablet using xda app-developers app

No should. You will.

So I can take my att sim card out of my current smart phone with data plan put it in the unlocked i9020a and be good to go? or will I have to set any thing else up? Thanks for your help just want to make sure before I buy.
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If its the 9020a ( same for the 9020t just no 3g) as you mentioned then yes. Just put the sim in. It is a full sized sim so keep that in mind.