[Q] unlock vibrant with at&t - Vibrant General

i recently unlock my vibrant and now on at&t.
straight to the point i can recieve text messages but not send out.
i tried changing the message center number from tmobile to at&t but itz highlighted gray and unable to change.
if anyone knows wat to try next feel free
thankz

Try this: http://forum.xda-developers.com/showthread.php?t=782253

Do u know if u can get 3G on ATT with the unlock?

Bronco gator 15 said:
Do u know if u can get 3G on ATT with the unlock?
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Yes you can. I have a Tmobile Vibrant unlocked and working on AT&T.

Bronco gator 15 said:
Do u know if u can get 3G on ATT with the unlock?
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Click to collapse
Many debates on this. My understanding is that one of the two bands (can't remember which) works on the vibrant. my work phone uses att and where I live I get att 3g when I switch out the sims. Not sure what band it is on to get this but it does work for me.
Sent from my SGH-T959 using XDA App

a400meter said:
Many debates on this. My understanding is that one of the two bands (can't remember which) works on the vibrant. my work phone uses att and where I live I get att 3g when I switch out the sims. Not sure what band it is on to get this but it does work for me.
Sent from my SGH-T959 using XDA App
Click to expand...
Click to collapse
The T-Mobile US Vibrant has the 1900MHz 3G band. AT&T still uses it in some places, but was supposedly phasing it out as of several years ago. Works fine in my area.

Related

UN-Friggin-Locked Baby!

Confirmed! I got a code from unlockadic on EBay and now have my Vibrant on ATT! FU TMobile!
Could you not have just bought a captivate?
Sure, but wanted a Vibrant and got one used much cheaper. Plus, I don't have a contract and don't want to have one.
Shane_pcs said:
Could you not have just bought a captivate?
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Yeah I am confused, what is the benefit of having a vibrant on AT&T as opposed to just getting a captivate? Aren't you basically running the same phone but without 3G?
We're all happy for you, not sure why though.
Plus, I need to use it out of the country and att wouldn't unlock the Captivate for 10 months, even if bought at full price. What do you mean no 3g? I am using 3g on it no prob.
Being that there have been several people wanting to unlock it without success, I figured I would let everyone know that this source is confirmed to work. If you aren't concerned, why bother posting that you don't care?
techspy said:
Plus, I need to use it out of the country and att wouldn't unlock the Captivate for 10 months, even if bought at full price. What do you mean no 3g? I am using 3g on it no prob.
Being that there have been several people wanting to unlock it without success, I figured I would let everyone know that this source is confirmed to work. If you aren't concerned, why bother posting that you don't care?
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Really? That is interesting I have always been told that the tmo and AT&T 3G networks weren't compatible, and my unlocked mytouch has no 3G access.
Edit; It isn't that I didn't care I was just confused at the benefit of doing it considering the availability of nearly the same device on the network you are using it on.
maybe you should give Simple Mobile a try since it's unlocked. $60 a month for unlimited everything, no contract. An additional $10 gets you international calling. Sorta like Boost Mobile, except you supply your own unlocked GSM phone. There's a one time $12.99 fee to get their SIM.
I went this route with my daughter as I was able to get her a cheap used slider phone for practically nothing.
And the reason why this worked for him is the Vibrant supports the UMTS1900 band that AT&T uses. One of the rare T-Mobile phones that does.
I am confused how you are using 3G? ATT uses 850mhz band for their 3G and the Vibrant only is able to use 3G on either 1700mhz or 2100mhz. Am I missing something here?
Sent from my SGH-T959 using XDA App
Yep, 3g is working. The places I will be spending time in out of the USA don't have many options for service. Basically I buy prepaid sims and don't use data.
I have been with ATT so long that I still have the $15/mo unlimted data. Which is low enough to warrant leaving the account on while I am out of the country.
So to recap, ATT would not let me unlock the Captivate for 10 months even if I bought it outright. (I spent a long time talking to them to find this out as I was about to purchase a Captivate)
I do not want to get into a new contract
I need to use it out of the country.
I got a Vibrant used at a good deal.
That Simple Mobile looks like a good deal! If I didn't have the $15/mo unlimited data now, I would give them a shot.
dcam1075 said:
I am confused how you are using 3G? ATT uses 850mhz band for their 3G and the Vibrant only is able to use 3G on either 1700mhz or 2100mhz. Am I missing something here?
Sent from my SGH-T959 using XDA App
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I don't know but it is working. I have crappy service at my house (for all carriers) and it goes back and forth between "3G" and "E". When I have a descent signal, it sure seems pretty snappy so I believe it is 3G. I will try a speed test when I am in a good signal location. Aren't the Captivate and Vibrant the same hardware wise? Wouldn't it make sense that it would work with ATT 3G if that is the case?
They area similar hardware but the radios are carrier specific. I am pretty sure it won't work on 3G on ATT for the same reason the iPhone doesn't work on T-Mo's 3G. You must be seeing some sort of glitch on your phone. Definitely try a speed test while you are on 3G and let us know!
Sent from my SGH-T959 using XDA App
I had to take a drive to test. Solid 5 bars, 3G indicator and tested on DSL reports and mobilespeedtest.com, both gave same numbers 1127kbps.
Get the speedtest.com app in the market.that is a more reliable speed test app.
Sent from my SGH-T959 using XDA App
I see speedtest by xtreme labs, speedtest.net speed test, and mordax speedtest. No speedtest.com app shows up.
techspy said:
I see speedtest by xtreme labs, speedtest.net speed test, and mordax speedtest. No speedtest.com app shows up.
Click to expand...
Click to collapse
speedtest.net
My bad I meant speedtest.net
Sent from my SGH-T959 using XDA App
Got it. I will test tomorrow and post the results.
I am confused about the Vibrant's 3G capabilities on ATT network as well...
When I had my Nokia N95 unlocked it didn't work on TMO's 3G but did on ATT's network. The same deal with iPhones, they won't work on TMO's 3G and limited to EDGE.
Well, I will have TMO unlock my Vibrant and pop my blackberry's ATT card in to see what's the deal.
You should of got an iphone... Lol.
Good luck with working it all out!
Catchin' the VIBE on the XDApp

AT&T Data Question

Im Thinking of buying one off of ebay and was wondering if i unlock it, since the phone is meant for T-Mobiles "4g" will i my Data work and get 3g, and when AT&T gets 4g will it work for the device?
ShadowLegion said:
Im Thinking of buying one off of ebay and was wondering if i unlock it, since the phone is meant for T-Mobiles "4g" will i my Data work and get 3g, and when AT&T gets 4g will it work for the device?
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Click to collapse
Once you unlock it for AT&T it will only function on EDGE, correct me if I'm wrong, not too sure if this phone is compatible with AT&T 3G network....most likely it will not.
Sent from my HTC Glacier
ghost_231 said:
Once you unlock it for AT&T it will only function on EDGE, correct me if I'm wrong, not too sure if this phone is compatible with AT&T 3G network....most likely it will not.
Sent from my HTC Glacier
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oh.. do you know if the G2 or MyTouch 3g Slide is the same
Is the same for all t-mo phones. The Frequencies used by at&t and t-mobile for 3g are different. The most you will get is EDGE, and we all know that EDGE SUCKS
No 3g wont work. only 2g/edge will work as att and Tmobile have different data radios. If you have the old dataplan for att and don't want to pay 15 for 200mbs get a vibrant. If your lucky it'll pick up the 850mhz 3g band to get 3g for at&t. And you'll keep the old data plan because att wont pickup the imei of the vibrant.
Sent from my unicorn
Alex530 said:
No 3g wont work. only 2g/edge will work as att and Tmobile have different data radios. If you have the old dataplan for att and don't want to pay 15 for 200mbs get a vibrant. If your lucky it'll pick up the 850mhz 3g band to get 3g for at&t. And you'll keep the old data plan because att wont pickup the imei of the vibrant.
Sent from my unicorn
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alright thanks. I had the old Unlimited Data Plan but it changed me to the new 2GB Plan when i Upgraded Last Week but when i get the phone im gonna call them so they can switch it back. Even if i sell it or not

[Q] 4g speed on at&t phone.

Hello everyone
i just bought a brand new samsung infuse locked to at&t. I got it unlocked to use it with tmobile.i am currently using mytouch4g. i am able to use infuse after unlocking with tmobile but can not get 4g data speed on infuse.it only gives me EDGE speed
is there any setting out here that i can use that will give me 4g speed on samsung infuse using tmobile sim just like i get with mytouch4g. and i want to use it with tmobile USA.
please help
thanks in advance
No reply to help me. Please guys id anyone have any answer this .
I would really appricate this.
Sent from my HTC Glacier using Tapatalk
EDGE is 4G on AT&T. just kidding
I would check what you have it set to under phone options, dail *#*#4636#*#*, and check what band you have selected, as well as correct APN settings.
ATT's 4G bands are not the same at T-Mobile's 4G bands. Wont work no way no how.
@ chris it says gsm/wcdma auto(prl)
Sent from my HTC Glacier using Tapatalk
AT&T is using 1900 MHz (850 MHz in some markets) for 3G. T-Mobile will use 1700 MHz for download and 2100 MHz for upload or pretend I didn't say anything and keep trying something that isn't doable. that's your call
like jay says it doesn't have the correct network band antennas,
just sell it, new smartphones are coming out weekly.
and 4G is gimmicky, best of luck,
Thank you so much guys for trying to help. Do you guys think if root my phone and install custom rom. Is there any chance of getting 4g speed then?
Sent from my HTC Glacier using Tapatalk
ipaq dude said:
Thank you so much guys for trying to help. Do you guys think if root my phone and install custom rom. Is there any chance of getting 4g speed then?
Sent from my HTC Glacier using Tapatalk
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it's a hardware limitation
check the APNs. I got an Atrix and my downloads on HSPA+ were between 2 and 3. Then I changed the APNs, they had 4 options. THen I got 5-7 downloads. Thats the closest to 4G you'll get on ATT
DiamondJay20 said:
check the APNs. I got an Atrix and my downloads on HSPA+ were between 2 and 3. Then I changed the APNs, they had 4 options. THen I got 5-7 downloads. Thats the closest to 4G you'll get on ATT
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Are you sure it's not just the amount of traffic in your area?
Here in NYC, i've hit anywhere from 1.5Mbps down all the way up to 6+Mbps down
wow thanks for the info.are you on tmobile also ?
if yes do you mind sharing your apn settings.
i get good 4g speed with mytouch 4g which is tmobile branded device.
Thanks again for your inputs to help me out.
ph00ny said:
Are you sure it's not just the amount of traffic in your area?
Here in NYC, i've hit anywhere from 1.5Mbps down all the way up to 6+Mbps down
Click to expand...
Click to collapse
ipaq dude said:
wow thanks for the info.are you on tmobile also ?
if yes do you mind sharing your apn settings.
i get good 4g speed with mytouch 4g which is tmobile branded device.
Thanks again for your inputs to help me out.
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Click to collapse
ATT
Never tweaked and still on the cingular wap setting
Sent from my GT-I9100 using XDA App
ipaq dude said:
wow thanks for the info.are you on tmobile also ?
if yes do you mind sharing your apn settings.
i get good 4g speed with mytouch 4g which is tmobile branded device.
Thanks again for your inputs to help me out.
Click to expand...
Click to collapse
I hate to burst your bubble but there is no way you are going to get the AT&T device to work on T-Mobile's 3G, nevermind "4G"/HSPA. Sorry.
right... It has to do with the phone and the hardware... aka - the stuff they build the phone with. Its like if you try to use a phone to receive xm radio frequencies... it's not going to work... If you have a phone with the ATT bands they will NEVER work the same on Tmobile. But you can get Edge on any GSM network. Hope this helps. Search for att cellular bands on Google and compare them with Tmobile cellular bands.
Sorry to say it but the guys are correct! ALL of the AT&T 4G phone are quad band GSM phones! They work on the 850/1900 frequencies for all data and communication purposes in the USA! T-Mobile uses 1700! So basically you should have done a little more homework before you ran out and spent all that money!
If you are lucky you can still sell it and maybe get your money back!
Sent from my MB860 using XDA App
yes i know.what waste i hope i will be able to sell it.thank you guys anyways.
souperman7340 said:
Sorry to say it but the guys are correct! ALL of the AT&T 4G phone are quad band GSM phones! They work on the 850/1900 frequencies for all data and communication purposes in the USA! T-Mobile uses 1700! So basically you should have done a little more homework before you ran out and spent all that money!
If you are lucky you can still sell it and maybe get your money back!
Sent from my MB860 using XDA App
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Wont work at all. Different bands. That is the one crappy part. TMO uses there oddball 1900 MHZ or something like that.
mediq91 said:
Wont work at all. Different bands. That is the one crappy part. TMO uses there oddball 1900 MHZ or something like that.
Click to expand...
Click to collapse
They use 1700 and 2100 (both are required by the phone).

AT&T on Tmo sim card

Is there a way to force the phone to use AT&Ts towers? Like for example when i was on sprints network i would simply flash a verizon PRL and done i got full 3g coverage on verizon's towers.
Is the same ideaology possible for a phone running a Tmobile sim card to force it to use an ATT tower? Like can i force it to roam?
Only if the carrier tower allows your sim to roam then you can try to switch carriers through the wireless settings. Otherwise you get no signal.
Sent from my HTC HD2 using XDA
hengsheng120 said:
Only if the carrier tower allows your sim to roam then you can try to switch carriers through the wireless settings. Otherwise you get no signal.
Sent from my HTC HD2 using XDA
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Mmmm that's what I figured :\ I just feel like there has to be a way around it
Sent from my HTC HD2 using Tapatalk
hengsheng120 said:
Only if the carrier tower allows your sim to roam then you can try to switch carriers through the wireless settings. Otherwise you get no signal.
Sent from my HTC HD2 using XDA
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it wouldnt matter anyway unless he has a telstra hd2
he would still only get 2g since the hd2 doesnt have att 3g bands
Kameirus said:
it wouldnt matter anyway unless he has a telstra hd2
he would still only get 2g since the hd2 doesnt have att 3g bands
Click to expand...
Click to collapse
I have the T-Mobile version and its unlocked. But i have a T Mo sim card cause i find them to be the best service(this is my opinion) but at some places T Mobile only has 2G coverage while ATT has 3G and it would be nice to just hop on their towers for the couple hours i'll be there to get faster speeds
elesbb said:
I have the T-Mobile version and its unlocked. But i have a T Mo sim card cause i find them to be the best service(this is my opinion) but at some places T Mobile only has 2G coverage while ATT has 3G and it would be nice to just hop on their towers for the couple hours i'll be there to get faster speeds
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Click to collapse
i know all about that lol
i have a tmo hd2 on att cause i cant afford to switch to tmo right now
but when i get the cash flow again ill be switching in a heartbeat
Kameirus said:
i know all about that lol
i have a tmo hd2 on att cause i cant afford to switch to tmo right now
but when i get the cash flow again ill be switching in a heartbeat
Click to expand...
Click to collapse
I'm on the 30 bucks a month plan, totally can not complain either, just gotta stop streaming all my anime cause I'm already at 3.5gb xD
Sent from my HTC HD2 using Tapatalk 2

[HELP] [URGENT] Looking for a Network work with 2100UMTS

Hi fellows xda, i'm an international student here in the States and I just came 3 days ago. Now after purchasing a T-mobile SIM Card I realize that, T-mobile 3G network does NOT work with my device, which is an iPhone 3Gs unlocked. I do not know its origin because a friend give it away to me, but I can use it normally in Asia so I assume that it uses 900/2100 UMTS band for 3G/HSDPA.
After a while of searching now I know that none of T-mobile nor AT&T support this baseband, so my question is, are there any other U.S service provider that support this band so I can get 3G/HSDPA working on my phone ? I desperately need this feature because I need to skype with my family back home. So please, any suggestion would be helpful. I don't want my phone will be a brick here because it doesn't have internet on it.
Thank so much guys for any help or suggestion. I'm waiting for all your replies.
I think the 3gs has 1900.
Sent from my XT883 using xda app-developers app
yeah i think so but T-mobile band is 1700.
if you mean I can have EDGE, yes i do. but it just not enough.
thank for your reply.
hey said:
yeah i think so but T-mobile band is 1700.
if you mean I can have EDGE, yes i do. but it just not enough.
thank for your reply.
Click to expand...
Click to collapse
T-mobile uses both 1700mHz/2100mHz bands. 1700 for the downlink. 2100 for the uplink. It won't work only on 2100.
Sent from my HTC_Amaze_4G using xda premium
yes i do know that basically my phone will not have any 3G on T-mobile.
so is there any other network provider that will work with my phone ?
hey said:
yes i do know that basically my phone will not have any 3G on T-mobile.
so is there any other network provider that will work with my phone ?
Click to expand...
Click to collapse
AT&T
Sent from my XT883 using xda app-developers app
MrObvious said:
AT&T
Sent from my XT883 using xda app-developers app
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humm...
i don't know if my phone was AT&T either... so i will give it a try.
but i think the most possible that it will not work... because AT&T is 1900 i think...
hey said:
humm...
i don't know if my phone was AT&T either... so i will give it a try.
but i think the most possible that it will not work... because AT&T is 1900 i think...
Click to expand...
Click to collapse
I thought the 3Gs had 1900 in the antenna.
MrObvious said:
I thought the 3Gs had 1900 in the antenna.
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Click to collapse
i don't really know. maybe. i just know for sure that it has 2100 because my country's where i use it with 3g is 2100.
i'll give it a shot this weekend anyway. thanks for the tip.
EDIT: yes, i've search. it does operate on 1900. so i'll be changing to at&t next month then. because i've already payed for the 1-month prepaid t-mobile plan though.
thank you so much
EDIT: but it seems at&t plans are a little bit expensive for a student like me. and i do see complains about the service. so if possible. are there any other network that work with 850/1900/2100 3G baseband ? just curious. so i will be like having a choice. if not, it is att for sure.
hey said:
i don't really know. maybe. i just know for sure that it has 2100 because my country's where i use it with 3g is 2100.
i'll give it a shot this weekend anyway. thanks for the tip.
EDIT: yes, i've search. it does operate on 1900. so i'll be changing to at&t next month then. because i've already payed for the 1-month prepaid t-mobile plan though.
thank you so much
EDIT: but it seems at&t plans are a little bit expensive for a student like me. and i do see complains about the service. so if possible. are there any other network that work with 850/1900/2100 3G baseband ? just curious. so i will be like having a choice. if not, it is att for sure.
Click to expand...
Click to collapse
Just get a Straight Talk AT&T SIM. It's 15 bucks for the SIM and 45 for the unlimited calls/sms and "unlimited" data.
MrObvious said:
Just get a Straight Talk AT&T SIM. It's 15 bucks for the SIM and 45 for the unlimited calls/sms and "unlimited" data.
Click to expand...
Click to collapse
yeah it is a little too much. like double what i have to pay for my T-mobile. just 30 bucks for the whole package including the SIM already, 100min talk, unlimited sms and data. so it just as good. because i don't call that much though. just data. thanks for the detail anyway. appreciate it. so i'll be heading over att next month.

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