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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....
Sent from my SGH-T959 using Tapatalk
Not sure how I could check unless i unlocked it..
Sent from my SGH-T959V using Tapatalk
princedwi said:
Not sure how I could check unless i unlocked it..
Sent from my SGH-T959V using Tapatalk
Click to expand...
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.
Click to expand...
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?
Click to expand...
Click to collapse
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.
Sent from my SGH-T959V using XDA Premium App
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!
Click to expand...
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.
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.
Click to expand...
Click to collapse
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.
Click to expand...
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?
Well after moths investigating on internet and different carriers in my country I can solve this, the thing is here we have HSPA+ "4G" i'm with Digicel right now but the thing is I still getting 3G, moreover settings>about>status>mobile net type says HSDPA and I've confirmed they use 1900Mhz for 4G
Customer service as always don't even know what all of this things are so this is my last resort to solve this mystery. Is the carrier or the phone??????
thanks in advance
**delete**
Thanks for the reply but the post don't really help me because Digicel only use 1900 as I said I got 3G but not HSPA+. When I enable/disable wcdma 1900 is it turns to 3G/edge instead of "4G"
inmortal009 said:
Thanks for the reply but the post don't really help me because Digicel only use 1900 as I said I got 3G but not HSPA+. When I enable/disable wcdma 1900 is it turns to 3G/edge instead of "4G"
Click to expand...
Click to collapse
When choosing a phone, what frequencies will work on this network?
· Our 4G network will work well with any 3G+ handset which supports 2100 MHz.
This is off of one of Digicel's websites.
lumin30 said:
When choosing a phone, what frequencies will work on this network?
· Our 4G network will work well with any 3G+ handset which supports 2100 MHz.
This is off of one of Digicel's websites.
Click to expand...
Click to collapse
Sorry for don't mentioned this before but I'm with Digicel Panamá, here the only available bands are 850 and 1900 and they only use 1900. However I tested with 2100 only enabled and doesn't work.
This phone can use 1900mhz too, for some reason I only get 3.5G instead 4G or H+ symbol...
I am with Cincinnati Bell and have never been able to get my phone on 4g (except when I was in Chicago). I have spent hours on the phone with customer service, reading forums, posting questions and I still to this day only get 3g. There is something odd about this phone using another (smaller) carriers 4g (hspa+).
However, I know that there are a lot of people that use Simple Mobile with our phone and 4g is no problem... so idk
jigglynuts said:
I am with Cincinnati Bell and have never been able to get my phone on 4g (except when I was in Chicago). I have spent hours on the phone with customer service, reading forums, posting questions and I still to this day only get 3g. There is something odd about this phone using another (smaller) carriers 4g (hspa+).
However, I know that there are a lot of people that use Simple Mobile with our phone and 4g is no problem... so idk
Click to expand...
Click to collapse
Well I give up there is nothing left to try and we'll never know the cause of the problem
I want to figure this out once and for all.
What services does this phone support on the 850 MHz band?
The big question is whether UMTS/HSPA works. NYC area has amazing 850 band coverage on AT&T.
If I were to put a prepaid AT&T SIM in my phone, set my phone to only operate on the 850 MHz band, and set the proper APNs (necessary for 3G?); would I be able to get data beyond EDGE?
Only one way to find out...
There's no mystery to it if you read through the [GUIDE] Set up Verizon Galaxy S3 as World GSM Phone (confirmed working) thread and the [BOUNTY] ($205 so far) Enable HSPA+ on 1900 MHz / 1700MHz for VZW Galaxy S3 i535 threads completely....
With the radio software verizon has on the phone, the galaxy s3 is quad band GSM (850/900/1800/1900) and single band WCDMA (2100).
We don't know if it has the hardware for WCDMA 850/900/1900 and until now, nobody has successfully flashed a different radio due to the bootloader lock. Keep an eye on the "enable WCDMA 1700/1900" thread for updates.
And just to answer another question that you might have, when my S3 was rooted and set up to work in Germany, I tried both T-Mobile and AT&T sim cards here in town. The problem with the S3 is that even if you try to select a different WCDMA band in the field test menu, the radio firmware will not allow you to change it from 2100. So in an area with T-Mobile PCS (1900) and AT&T PCS/CELLULAR (1900/850) WCDMA, each test I tried only ran on EDGE.
Sent from my Nexus 4 using xda premium
Wow... That really sucks.
So, there's literally no way to get 3G outside of Verizon aside from MetroPCS EVDO?
LLStarks said:
Wow... That really sucks.
So, there's literally no way to get 3G outside of Verizon aside from MetroPCS EVDO?
Click to expand...
Click to collapse
The first step is to experiment with different radio files, as one user in the 1700/1900 thread wants to do, but we need to get the secure-boot/bootloader unlocked so those files can be written.
Phones like the Rezound had the hardware for Quad-band WCDMA (3g), but took a radio file flash to make it work. The reason there is a bounty is because we -think- the Verizon S3 has the hardware, it will just take some work to get the software on the phone to talk to that hardware.
I know. I've been following the thread.
Was a little unsure of the details regarding frequencies.
As far as I understand, they're at a dead end. They need JTAG/UART to continue without worrying about bricks.
LLStarks said:
I know. I've been following the thread.
Was a little unsure of the details regarding frequencies.
As far as I understand, they're at a dead end. They need JTAG/UART to continue without worrying about bricks.
Click to expand...
Click to collapse
Yeah, and sadly, I lack the skills and the bounty probably isn't enough to attract a dev with JTAG and a phone to fiddle with to solve our issue
Verizon cdma is ran by nortel dual urban base stations the frequencies are 810-910 and 1840-2000mhz. The LTE is 690-760mhz 1x means that your on 850. 3g means your on 1900 or 850 depending on how far away from the site you are, and 4g means your on LTE. The LTE base station is ericsson but speeds will vary depending on whether or not the site is on fiber or T1 transport. Normally they keep the pre pay customers on the nortel dual urban... Oh by the way we are starting to decommission the lucent cdma on metro pcs sites and convert them to t-mobile GSM but luckily metro uses ericsson for LTE too so there's hope.
Sent from my SCH-I535 using xda app-developers app
I just got this Sky Vega LTE EX im-a820L from Korea and I was told it's unlocked.
I put in a AT&T sim card and it says the registration failed and I can't even make a phone call.
Is anyone here using this phone in the USA?
How do I make it recognize the sim card?
gooruma said:
I just got this Sky Vega LTE EX im-a820L from Korea and I was told it's unlocked.
I put in a AT&T sim card and it says the registration failed and I can't even make a phone call.
Is anyone here using this phone in the USA?
How do I make it recognize the sim card?
Click to expand...
Click to collapse
From what I see here it looks like it only supports 900, 1800, and 1900 GSM frequencies. AT&T do use 1900 in some places, but 850 in most. So it looks like the phone isn't a great candidate for use on AT&T. T-mobile use 1900 so you might have better luck with them. However, it will only be 2G.
desertflyer said:
From what I see here it looks like it only supports 900, 1800, and 1900 GSM frequencies. AT&T do use 1900 in some places, but 850 in most. So it looks like the phone isn't a great candidate for use on AT&T. T-mobile use 1900 so you might have better luck with them. However, it will only be 2G.
Click to expand...
Click to collapse
:good: Thanks for this good info.
Now I don't know what to do with it.
Is there an active im-a820L forum here?
Since T-mobile uses 1900, does that mean I can use it to make a call and use 2G?
How is 1900Mhz coverage?
Thanks much.
T-mobile has all of their 2G GSM coverage on 1900Mhz, so you would be able to make calls just about anywhere T-mobile has service. I don't know if there is a forum for that device here on XDA - sorry!
yes theres an active forum here, im a Sky vega 820L user..:good:
Sky Vega 4G LTE EX IM-A820L on GSM
Works this phone on GSM network?
ika-2 said:
Works this phone on GSM network?
Click to expand...
Click to collapse
yes..
Sent From my Google Nexus 5 Using Tapatalk 4
official jb update will be released in a few days :cyclops: