[Q] A little Help. - Optimus One, P500, V General

Ive got a T-mobile Optimus T LG P509. Its been unlocked and im now using it on the ATT network. Ive been told that ATT and T-mobile Operate on different frequencies, and that it is impossible for me to get 3g signal on the p509; is this correct?

AT&T 3G frequency bands are 850/1900 MHz while Optimus T supports 1700/2100 MHz so it should not work.
AT&T 3G Bands
OptimusT 3G Bands

Related

[Q] Is Telus a GSM Network now?

I know telus used to be strictly cdma, however i know as of 2010 they have made some upgrades.
Does anyone know if unlocked phones such as this one:
(add http) cgi.ebay.com/MOTOROLA-DROID-MILESTONE-2-ANDROID-SMARTPHONE-UNLOCKED-/140483114173?pt=Cell_Phones&hash=item20b57234bd
would fully funcionall work on telus?
Just by looking at the supported bands it won't work on Telus or Bell. It will only work on Rogers but at EDGE speeds. The current supported bands by Telus and Bell are 3G only which are 850/1900 frequency. The only other provider in Canada which has a different one is Wind which is on the AWS 1700 frequency so T-Mobile 3G phones should work.
Telus and Bell Canada are not GSM because that refers to 2G which is a legacy network they do not have. They are 3G which all the 2G providers such as AT&T have upgraded to. Their CDMA network is still there running in parallel for now.
They use the exact same 3G system and frequencies as AT&T. So any AT&T 3G phone will also work on Bell or Telus. They do not have the legacy network so 2G phones will not work. Only 3G phones.
To put it another more technical way:
They support 3G UMTS/HSPA 850MHz and/or 1900MHz
They do NOT support 2G GSM/EDGE on any frequency

[Q] Rooted/Unlocked - Tmobile SIM - data transfer is on E (edge)

Hello All,
I am on tmobile and had samsung galaxy s before i got SGS2 from at&t (my wife upgraded). i unlocked/rooted the phone after reading through the posts and it worked like a charm!
My concern right now is that I am always on edge data network with tmobile. can anyone help me on this. Tethering is also not much of use when i am on the slowest connection. Please help.
Can't do much about it since AT&T version doesn't support the 3g/4g band for T-mobile.
At&t gs2 doesn't support t-mobile frequency for 3 g.
Sent from my SAMSUNG-SGH-I777 using xda premium
I thought this phone has all the bands to support all networks.
parags1982 said:
I thought this phone has all the bands to support all networks.
Click to expand...
Click to collapse
No only AT&T.
My guess is that international version supports all the bands not the carrier branded sgII
^Even international version doesn't support T-Mobile 3g/4g (HSPA+) network.. Not many phones support their network. Or maybe it will.. but not everywhere
AT&T SGSII
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 1900 / 2100
T-Mobile SGSII
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 1700 / 2100
International SGSII
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100
I am following another post that lets says HOW TO: "Enable 850Mhz 3G Network Frequency on your Samsung i9000 Galaxy S''. will update how it goes... fingers crossed..
parags1982 said:
I am following another post that lets says HOW TO: "Enable 850Mhz 3G Network Frequency on your Samsung i9000 Galaxy S''. will update how it goes... fingers crossed..
Click to expand...
Click to collapse
No luck. i read somewhere that i may need to install another modem?
Is there anyone out there with the same issue as mine?
any experts out there?
parags1982 said:
I thought this phone has all the bands to support all networks.
Click to expand...
Click to collapse
The AWS (1700) bands are supported only by a handful of carriers. It doesn't exist at all in Europe and Asia. There's little reason for manufacturers to include it on their global phones as so few people use it. It's the reason the T-Mobile SGS2 has a Qualcomm chip instead of Exynos like the rest of them. After the merger, it won't even exist in the U.S. any longer as AT&T plans on using it (1700) for LTE. If you want versatility and the ability to use unlocked phones, change to AT&T.
parags1982 said:
I am following another post that lets says HOW TO: "Enable 850Mhz 3G Network Frequency on your Samsung i9000 Galaxy S''. will update how it goes... fingers crossed..
Click to expand...
Click to collapse
In order to get T-mo 3G, a phone must support HSPA on 1700MHz AWS band, not 850MHz. As such, only phones from T-Mo or some Candadian carrier support 1700 band. Rest of the world use 900/2100 for 3G and AT&T uses 850/1900 for 3G/4G.
You are never going to get 3G on T-Mo on any phones from AT&T. Period. Give it up.
foxbat121 said:
In order to get T-mo 3G, a phone must support HSPA on 1700MHz AWS band, not 850MHz. As such, only phones from T-Mo or some Candadian carrier support 1700 band. Rest of the world use 900/2100 for 3G and AT&T uses 850/1900 for 3G/4G.
You are never going to get 3G on T-Mo on any phones from AT&T. Period. Give it up.
Click to expand...
Click to collapse
thanks. i give up
TMobile uses 1700 up, 2100 down. If the handset doesn't support 1700, you are out of luck.
Correct. Many phones support the 2100 MHz International band.
T-Mobile's network is weird though, and uses both 1700 and 2100 MHz at the same time.
My guess is that UMTS1700 support and not 42 Mbps HSPA+ is why the T-Mobile variant of the GS2 is such an oddball phone.
NO AT&T phone and only a small handful of international phones support T-Mobile's 1700 MHz band.
Similarly, only one or two T-Mobile phones (The Vibrant being one of them) support any of AT&T's 3G bands, but none support all of AT&T's 3G bands to my knowledge.
The interesting thing about this entire thing is that if you go into the modem band selection it lists 5 different wcdma bands including the aws 1700. I enabled those bands and tried using a tmo sim but alas it still only worked on edge. It may have just been there cosmetically rather then actually supporting aws bands. use dialer code *#2263# to access the band selection menu. Maybe there is a way to get it to work.
pb1866 said:
The interesting thing about this entire thing is that if you go into the modem band selection it lists 5 different wcdma bands including the aws 1700. I enabled those bands and tried using a tmo sim but alas it still only worked on edge. It may have just been there cosmetically rather then actually supporting aws bands. use dialer code *#2263# to access the band selection menu. Maybe there is a way to get it to work.
Click to expand...
Click to collapse
I agree with you and have tried exactly what you did (along with other bands) but still not working.
pb1866 said:
The interesting thing about this entire thing is that if you go into the modem band selection it lists 5 different wcdma bands including the aws 1700. I enabled those bands and tried using a tmo sim but alas it still only worked on edge. It may have just been there cosmetically rather then actually supporting aws bands. use dialer code *#2263# to access the band selection menu. Maybe there is a way to get it to work.
Click to expand...
Click to collapse
Typically, the s/w supports multiple versions of h/w. Just because an option's in the menu doesn't mean the h/w's available to support it. The same thing happened with the T-Mobile G2X. It was supposed to be quad-band, the option was in the ROM, but the radio wasn't there to support all the bands.

[Q] hey guys looking for a straight answer

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.
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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).
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
---------- 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
Click to expand...
Click to collapse

T-Mobile HTC One on ATT

According to the chart below, if I use a T-Mobile HTC One on AT&T, I would be able to use all of AT&T's HSPA+ network but will only be able to use their 700 MHz band for LTE? Am I reading it right or do I have it wrong?
I found this chart at android central (can't link because I'm blocked as a new user)
GSM/GPRS/EDGE
850/900/1800/1900 MHz
WCDMA
AT&T: 850/1900/2100 MHz
T-Mobile: 850/AWS/1900/2100 MHz
Sprint: 700/AWS MHz
CDMA
Sprint: 800/1900 MHz (BC0/BC1/BC10)
LTE
AT&T: 700/850/AWS/1900 MHz
T-Mobile: 700/AWS MHz
Sprint: 1900 MHz
Does this mean that if I have a T-Mobile phone, I can fully utilize HSPA+ speeds but not LTE speeds on AT&T?
gophermuncher said:
According to the chart below, if I use a T-Mobile HTC One on AT&T, I would be able to use all of AT&T's HSPA+ network but will only be able to use their 700 MHz band for LTE? Am I reading it right or do I have it wrong?
I found this chart at android central (can't link because I'm blocked as a new user)
GSM/GPRS/EDGE
850/900/1800/1900 MHz
WCDMA
AT&T: 850/1900/2100 MHz
T-Mobile: 850/AWS/1900/2100 MHz
Sprint: 700/AWS MHz
CDMA
Sprint: 800/1900 MHz (BC0/BC1/BC10)
LTE
AT&T: 700/850/AWS/1900 MHz
T-Mobile: 700/AWS MHz
Sprint: 1900 MHz
Does this mean that if I have a T-Mobile phone, I can fully utilize HSPA+ speeds but not LTE speeds on AT&T?
Click to expand...
Click to collapse
I'm wondering the same thing. If I purchase the tmobile ONE and use it on ATT, will I get LTE and MMS as well.
i want to use it the other way around an at&t htc one on tmobiles hspa+ will ill be able to do that please let me know
gophermuncher said:
According to the chart below, if I use a T-Mobile HTC One on AT&T, I would be able to use all of AT&T's HSPA+ network but will only be able to use their 700 MHz band for LTE? Am I reading it right or do I have it wrong?
I found this chart at android central (can't link because I'm blocked as a new user)
GSM/GPRS/EDGE
850/900/1800/1900 MHz
WCDMA
AT&T: 850/1900/2100 MHz
T-Mobile: 850/AWS/1900/2100 MHz
Sprint: 700/AWS MHz
CDMA
Sprint: 800/1900 MHz (BC0/BC1/BC10)
LTE
AT&T: 700/850/AWS/1900 MHz
T-Mobile: 700/AWS MHz
Sprint: 1900 MHz
Does this mean that if I have a T-Mobile phone, I can fully utilize HSPA+ speeds but not LTE speeds on AT&T?
Click to expand...
Click to collapse
nuprotocol said:
I'm wondering the same thing. If I purchase the tmobile ONE and use it on ATT, will I get LTE and MMS as well.
Click to expand...
Click to collapse
HSPA+, yes. MMS, yes. LTE? Maybe.
manaurys said:
i want to use it the other way around an at&t htc one on tmobiles hspa+ will ill be able to do that please let me know
Click to expand...
Click to collapse
Someone can correct me if I'm wrong, but only if you're in a refarmed 1900mhz frequency area. You can find out if you are here: http://airportal.de/
I've been investigating this. FCC documentation suggests that the HTC One for T-Mobile is certified for LTE Band 17 (AT&T).
I've unlocked the handset, but I'm only able to access AT&T's HSPA+ network.
Out of the box, the HTC One for T-Mobile doesn't support AT&T LTE.
If there is latent support, I reckon that you'd need to flash AT&T's radio to the device.
EDIT: I stand corrected. http://forum.xda-developers.com/showpost.php?p=41237507&postcount=17
the tmobile ONE supports tmobile/att hspa and lte for both carriers. The att ONE supports lte for both but only att hspa and only tmobils 1900 hspa.
Sent from my HTC One using Tapatalk 2
Best of both - Noob Asks
This is extremely curious to a noob like myself. To clarify, The HTC One purchased through Tmobile can be used on both the Tmobile and ATT networks? If purchased through Tmo how can I get the SIM for ATT? Can I toggle between the two? How can I utilize this awesome find to get the best out of each network. You all are smart. Thanks!
aWisseh said:
This is extremely curious to a noob like myself. To clarify, The HTC One purchased through Tmobile can be used on both the Tmobile and ATT networks? If purchased through Tmo how can I get the SIM for ATT? Can I toggle between the two? How can I utilize this awesome find to get the best out of each network. You all are smart. Thanks!
Click to expand...
Click to collapse
My friend has the T-mobile One and I have the AT&T One. He tried putting his T-mobile SIM in my phone, but it would not work (my AT&T One has to be unlocked, which I believe can be done if you buy an unlock code). I couldn't say if my SIM would work since my SIM is not actually AT&T's, it is a Straight Talk SIM that is compatible with AT&T's network. I imagine you could also unlock the T-mobile variant to work with AT&T's networks, but I'm not sure if it'd be able to work on the 4G network.

[Q] Unlocked t-mobile will work on at&t 3g bands?

im from mexico, we had 850 mhz like at& for 3g (we had lte but since my carrier sucks at lte i dont care lte but hspa+ AKA 3.9G)
so im trying to check offers on ebay (really expensive for internaitonal buyers ) but i saw some t-mobile htc one, so im wondwering t-mobile sim Unlocked will work on at&t 3g bands? hspa+?
Thanks

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