yashsingh1/xdaforums huggingface dataset:
[AT&T LG Optimus G] Nurmi_CEO:
Something about activating the SIM card from TMobile on this phone causes LTE to disappear.

Last night I was pumped. Got a brand new LG OG ATT phone, bought a TMobile prepaid $70 sim card, put it in the phone and entered the APN settings (I used epc.tmobile.com) and then bam....had 4G LTE. LTE symbol and was getting 20-30MB down speeds. Did some laundry, cleaned up, and drove to my friends house. On the way over I was in regular 4G mode. Thinking that LTE just wasn't in that area, I ended up back home and no more LTE signal.

In spots where I know LTE is being broadcasted, the signal is simply gone. I've tried a few other APN settings, but it just simply will not come back. In the network setting I can search for the available network network, and TMobile LTE is a choice. I select it but it still won't connect.

Now in this thread people are reporting the same thing. LTE suddenly disappears and will not come back. Digging through the threads, a few reported they got LTE, but they don't post after that if it went away or they got lucky and it's still working.

So frustrating. LTE signal is good here in Vegas and I like this phone but what gives??? We need a fix please!
[AT&T LG Optimus G] besweeet:
Ah, I understand now. In a similar but slightly unrelated comparison, my temporary Lumia 925 (AT$T) has had something similar happen to it, where one morning a few weeks ago, LTE was magically disabled, showing "4G" instead. It's still like that right now. Haven't found reports of it happening to others, though.
[AT&T LG Optimus G] besweeet:
Curious: what's battery life compared to AT$T?
[AT&T LG Optimus G] riskingl:
with non development

with non development with non development
[AT&T LG Optimus G] autosurgeon:
The reason you guys are losing LTE is T-Mobile is slowly switching to a diff band. And it is one this phone doesn't handle.
[AT&T LG Optimus G] br0adband:
And you have come upon this information from where, exactly, because they use band 4 and I've yet to see any mention of them moving to anything else - they've picked up where MetroPCS used to be and that's also band 4.

If you meant to say something about the 1700 MHz/AWS that's different and they're aren't doing that. They're refarming a big chunk of the 850/1900 MHz spectrum that they've been using for 2G/EDGE capabilities towards 4G HSPA+ and LTE as noted in this T-Mobile support document:

http://support.t-mobile.com/docs/DOC-5736

The LG Optimus G supports 850 and 1900 out of the box without any issues.

As I've said before and so have others, we DID have LTE working but then it just up and disappeared, but I can still see the T-Mobile LTE RAT when I scan for available networks so nothing in that respect has changed - as noted, Las Vegas was the first city in the US to actually have that switch flipped that enabled their LTE circuits so again, nothing has changed in those respects.
[AT&T LG Optimus G] besweeet:
Umm, what?
[AT&T LG Optimus G] autosurgeon:
I was trying to help a friend with this very same phone and when we talked with Tmobile about it that is what they told us. If I was informed incorrectly I am sorry. However I can think of no other reason why this would happen other than the hardware on the phone doesn't match the hardware on the towers.
[AT&T LG Optimus G] besweeet:
Bump. Anyone have any comments about battery life? I ask because my iPhone 5's battery life has turned into absolute junk (with Wi-Fi off, of course) the second I put my T-Mobile SIM. I'm assuming it's the phone's general compatibility with the network, and hoping that the E970 isn't like that.
[AT&T LG Optimus G] Julianjb:
Same here had LTE then only 4G

I had Lte the first time i poped in my tmobile sim and it would pick it up every time for the first 2 weeks but then it disapeared never to be seen again. It blows I believe that tmobile is restricting these unlocked atnt optimus lgs because the phone is capable of accessing LTE on Tmobile.
[AT&T LG Optimus G] whatsitsnamenow:
That's a negative. I have the Sony Xperia tl, HTC one x, iphone 5, and they all can access T-Mobile Lte just fine.

I have no idea what's going on with the optimus g. I only see Lte once in a blue moon, hence that's why I recently got rid of it.
[AT&T LG Optimus G] besweeet:
A stock E970 doesn't have options to force 2G/3G/LTE at any given moment, right?
[AT&T LG Optimus G] charleswesde:
It does. You can choose the preferred network mode in settings. GSM, WCDMA, GSM/WCDMA, GSM/WCDMA/LTE. You can also make the selection via the hidden menu.
[AT&T LG Optimus G] besweeet:
But where though? I haven't been able to find that anywhere using the stock AT$T ROMs, even in the hidden menu.
[AT&T LG Optimus G] inknzvl:
Did you had to adjust the settings of the phone ?

I will receive mine prety soon, I already have a T-Mobile phone, I will be just switching SIM card.

If you did adjust yours settings. Do you mind posting them here so that we can verify and match them.

Thank you!
[AT&T LG Optimus G] charleswesde:
You'll be able to make/ receive calls/ texts with no adjustments. However for data you will have to add the correct APN. A quick Google search will give you all the info you need.
[AT&T LG Optimus G] Cliff Clavin:
Hey guys first time poster.

I'm probably going to order one of these unlocked in the next couple days to use on T-mobile.

By coverage maps I should have good 4G LTE in my area. I'm in NJ close to NYC. For work and recreation I am all over NJ, in Manhattan and Brooklyn and PA from the edge of the border by 78 and also in Philly/Philly area a lot and by their coverage maps the LTE should be pretty bumping in all these areas.

I've been with T-Mobile for over 3 years and get good HSPA 4G in general with an old school G2 slider and understand if I'm not getting full LTE I need to rely on luck of refarmed to not wander on to terrible edge coverage with this device, but to make a long story longer I have a few questions/concerns:

1. Are people still having issues getting full LTE with this phone in areas where LTE is?

T-mobile is on the 1700/2100 bands for this right? And this phone supports those, so this on paper shouldn't be an issue, but I see ITT it seems it was an issue for at least half of you as recently as maybe the summer.

2. Anyone familiar with the refarm coverage in the areas I listed above? T-mobile still doesn't have any recent official updates or maps for their refarming of 1900 by google search.

3. What's the battery life like with this phone on T-mobile's network as an in general?

Thanks in advance.
[AT&T LG Optimus G] besweeet:
You'll get LTE, refarmed 3G/HSPA+, and of course EDGE. "Native" HSPA+ isn't possible since it doesn't support the 1700/2100 GSM bands, but it does the LTE band 4 (1700/2100) bands.

I'm assuming battery life will be lower than what one might be getting using the same phone on AT&T. With my experience using 3 different unlocked AT&T devices on T-Mobile (Samsung Focus, iPhone 5 (and 5s), and some other phone that I forgot), the battery would decrease at a noticeably faster rate when using cellular data.

I'm sure you'll be happy regardless. Speeds should be fast, the phone is good, and the network is awesome :laugh:.
[AT&T LG Optimus G] Cliff Clavin:
OK true, thanks.

I was waiting on the Z1 forever and now it finally comes to T-mobile and I just don't think I can't get past the size haha. It's almost 6 freakin' inches tall.

I'm still somewhat undecided, but I really need a new phone, this one has just run it's course and he Optimus G was a phone I really loved when it came out, it just never came to T-mobile and was too expensive unlocked til recently.

Figure I'm going to order a G tomorrow and rock it til maybe the summer or so when the next group of sick phones comes out and then sell it for like $75 to $100.

I'm hoping the Z1 Compact makes it to T-mobile by May if it does at all, or maybe the rumored Z1 Pro or Z2 with the smaller profile but bigger screen, but for now and maybe even for a year or so the Optimus G seems like a really nice stopgap at a really reasonable price new in the box.
[AT&T LG Optimus G] besweeet:
I'm surprised by how cheap they've gotten recently (<$200 new & unlocked). I guess it's to combat phones like the Nexus 5 and Moto G a bit.
[AT&T LG Optimus G] Cliff Clavin:
BTW, the E975 is pretty much useless on T-mobile right?

---------- Post added at 12:27 AM ---------- Previous post was at 12:20 AM ----------

Yeah, just say a month ago, maybe even 2 or 3 weeks ago IIRC they were over $300 on Amazon, I think around $340. I hadn't checked Ebay in awhile though, so not sure if they've been sub $200 for longer on there. That was the reason I hadn't bought one sooner. At that price it just made a lot more sense to wait for the Xperia or just go with the LG G2.

But at $195 with free shipping new with a warranty from a pretty local Ebay shop with 99+ rating on a ton of feedback really can't go wrong as long as it works well on the network.
[AT&T LG Optimus G] charleswesde:
1 The LTE issue was never resolved AFAIK, there hadn't been any recent posts on it as the people having the issue changed devices or simply gave up. If you get this device prepare yourself for the fact you may not get LTE at all. From the sounds of it tho it was a back end issue that may have been resolved. Either a system sweep that didn't recognize the LGOG as an LTE device that removed the LTE feature and replaced it with a standard data package, CSRs not placing the correct feature on in the first place or individuals going from nonLTE devices to the OG and not having the proper feature added.

2 Not familiar with it but at this point all major metro areas should be good to go so you should be fine unless you're out in the boonies.

3 Battery life should be comparable to that of those using the device on ATTs network, if you have battery issues flash a diff radio, most are using the hybrid 33/84 if I'm not mistaken.
[AT&T LG Optimus G] Ace42:
Give up on LTE on T-Mobile, don't even bother, nothing works. Even if I force LTE only on this & my N4 will my N4 be the only one to accept it. This thing will never connect to LTE outside of at&t.

Sent from my Optimus G
[AT&T LG Optimus G] Cliff Clavin:
I see you're still using it though, are you at least getting fast HSPA+?
[AT&T LG Optimus G] Cliff Clavin:
Also, is the E975 Optimus G pretty much useless on T-mobile?
[AT&T LG Optimus G] Ace42:
Oh I'm getting rearmed hspa+. It's insanely slow...About 1-4mb lol.

Sent from my Optimus G
[AT&T LG Optimus G] Cliff Clavin:
Oh man, that's pretty awful.

My old ass HTC G2 gets steady 5+ down and usually a decent amount better, even in the worst reception areas I'm usually in the 3's unless I slip onto Edge.
[AT&T LG Optimus G] Ace42:
That's because the G2 uses T-Mobile's normal bands, these rearmed towers w/ at&t band need a lot of work. However there are probably a lot of iPhones(att) on T-Mobile which may explain the low speeds.

Sent from my Optimus G
[AT&T LG Optimus G] Cliff Clavin:
Yeah, I was just figuring the refarmed in this area would be nearly identical. That's disappointing.
[AT&T LG Optimus G] rashp12:
t-mobile LTE

I live in t-mobile refarmed, LTE enabled/support area. My son's iphone 5 LTE works just fine on t-mobile but my new LG optimus g e970 ATT stock JB only displays 4G. I also went in hidden config changing WCDMA-ONLY>>MODEM SETTINGS>>RAT Selection>>Automatic like someone on stock JB suggested works but didn't work so I went to t-mobile store and ask them to swap sim card eventhough my original sim card was newer micosim version. Interestingly soon as I plug new sim card, 4GLTE came up. I left t-mobile store and did speed test and wov it was LTE speed. Than driving around in town no problem but when i went inside store, may be due to LTE signal unavailability or what but when it drop back to 4G and never came back to 4GLTE.

Iphone 5 GSM A1428 - LTE 700 MHz Class 17 / 1700 / 2100

LG optimus G E970 - LTE 700 MHz Class 17 / 1700 / 2100

This makes me nut. Why once 4GLTE works than once drops to 4G will not switch back to 4GLTE. T-mobile needs to look at this issue and fix it.
[AT&T LG Optimus G] Ace42:
And no one will ever know. I was wondering if the IMEI is getting blacklisted on LTE signals or something. It's so weird how I can switch to my N4 and get LTE, but when I return to my LGOG it will refuse to even acknowledge the same tower.
[AT&T LG Optimus G] dante501:
Did u ever try putting a non att ROM on to the e970? Something like cm11? See if it still won't see t mobile 4g LTE
[AT&T LG Optimus G] Ace42:
The problem is on custom and stock.

Sent from my Optimus G
[AT&T LG Optimus G] dante501:
I think the problem is that the e970 does not has t mobile LTE bands. That is e bands the e970 supports

2G NetworkGSM 850 / 900 / 1800 / 1900 3G NetworkHSDPA 850 / 1900 / 2100 4G Network LTE 700 MHz Class 17 / 1700 / 2100
[AT&T LG Optimus G] rashp12:
First, when you compare LTE bands spec of iphone 5 and LGOG, both are identical and iphone 5 LTE works. Second, when i put new sim and turn on LGOG, it does first come up with 4GLTE and works. I did web browse, OOKLA speed test to prove it works on Tmobile LTE. No doubt about it because ookla speed(upload/download) so much better(3x than HSPA+)) with LTE. But further along in time line one of the two things is happening. (1) LGOG firmware(including radio) once drops to 4G or lower is not able to switch back to 4GLTE.( 2) If further LGOG/t-mobile tower communication invalidates LGOG IMEI LTE support during more back and forth communications than t-mobile needs to fix it. T-mobile network support lab can do testing to figure out and help identify issue.
[AT&T LG Optimus G] besweeet:
Have you not been reading anything people have posted in this thread, let alone look up proper specifications of the phone compared to T-Mobile's LTE?
[AT&T LG Optimus G] rashp12:
Yes, I read this and other forums related t-mobile support for LGOG several times but did not find clear conclusion of what exactly(device vs t-mobile network or both) is issue. Respectfully, I appreciate if one could conclusively answer why 4GLTE support disappears(doesn't stick) after couple of hours working on t-mobile. No one posted, they contacted t-mobile and open trouble ticket with their device engineering support(which i did today) for them to let know where they see problem ? If I get definite answer from TO, I will post it here to rest this issue and move on. Thanks all.
[AT&T LG Optimus G] besweeet:
My post wasn't in reply to yours.
[AT&T LG Optimus G] Nick N:
We need to start a bounty for this! In for $20.00 USD

Let's see:

Device exists with similar specs that connects to T-Mobile LTE (Nexus 4)

Device has correct radio for LTE on T-Mobile (Band 4)

Device has Users that can initially connect to T-Mobile LTE (albeit temporarily) <-- Need proof for this such as speedtest, etc.

Not sure if I buy the T-Mobile blocking certain devices even though they are using a newer Micro-SIM card in an area that offers band 4 LTE. Can anyone name any other devices that cannot get LTE on T-Mobile even though it has the correct bands?
[AT&T LG Optimus G] dante501:
It might be also possible that att blocks it from getting LTE. But normally they would block it all together. Did you try a att sim card if u get LTE and it stay connected? It might be the LTE radio or something that is faulty.
[AT&T LG Optimus G] Ace42:
The E980/G Pro has the same issue. It could be something LG/att did to prevent LTE on T-Mobile network.

http://xdaforums.com/showthread.php?t=2392364

Sent from my Optimus G
[AT&T LG Optimus G] dante501:
That's what I mean. Att is knowing for doing this. Not for international carriers but with the gsm USA carriers they like to block stuff. Anyway. A non stock based ROM should normally take care of that. Like it does for WiFi tethering. Att with windows phone is so bad that u can't even change the MMS settings to receive MMS and such and they block the WiFi tether even in Europe so makes a windows phone based on att useless for WiFi tethering and MMS. Since u don't have the option on most windows phone to hack them to change stuff. Android leaves u note freedom with that.
[AT&T LG Optimus G] besweeet:
Proof could be found with less than a minute of time to quickly skim through the first 9 pages of this thread. Some screenshots are here and here.
[AT&T LG Optimus G] Nick N:
Good catch, I was on the way to a meeting and added that. So maybe we need something like an xposed module that can run a script of some sort or prevent whatever switches it off from doing so?
[AT&T LG Optimus G] besweeet:
Wouldn't all of that be more trouble than it's worth? People have messed around with different radios and other things to no avail, so unless someone happens to love the E970 that much, getting a different phone to solve the LTE problems might just be a more worthwhile approach.
[AT&T LG Optimus G] Nick N:
Not for someone who does it for fun or for a challenge... I didn't get this phone for LTE on T-Mobile, and I am on WiFi 80% of the day. I just think it is unfortunate that there is an LTE capable phone that has the LTE disabled.

I have come to find on these forums and in life that it is not necessarily the degree of difficulty that prevents a problem from being solved, it is who is working on it (no offense to anyone here).

A great example is the HTC HD2. Obviously it could never have LTE, but it would not surprise me if it it can run Jolla, KitKat, etc when an HTC Flyer got stuck on Honeycomb.
[AT&T LG Optimus G] Ace42:
I highly doubt any devs will have interest in handling this. I already bugged the developer of beanstalk if he could fix LTE, but it's still broken. I will stay away from att LG phones, since I know S4 and iPhone don't suffer from this.

Sent from my Optimus G
[AT&T LG Optimus G] aka369:
Thanks for starting this issue up with TMo! Seems like they punted big time in response to your first request (support.t-mobile.com/thread/63848)... I just hope the second one (support.t-mobile.com/thread/65053) can garner some sort of response from them.

Maybe if more folks posted to that second one it might put some more pressure on them... Not holding my breath but you never know...

Can't post links yet but a cut & paste from above should do the trick....
[AT&T LG Optimus G] rashp12:
Last time I posted saying I opened device trouble ticket with t-mobile support. Unfortunately, they came back saying typical answer that I have to wait for few months till t-mobile have stronger signal LTE in my area. I know no one on t-mobile created device<->network test scenarios to capture log and analyse it to pin point the problem.

Today, I bought new(unactivated,virgin,never used) SIM card and plug into my unlocked LG Optimus G e970 AT&T. Boom....4gLTE came up. Though I can't do much because the SIM is not activated and associated with account. But, confirms the theory.

Than, I removed new SIM and put my old t-mobile activated SIM. I still have 4gLTE. I turned off the phone and turned on and I still have 4gLTE. I did some emails and still 4gLTE. This lasted over 3 hours till I received first call and t-mobile call communications turned 4gLTE into 4G thinking this phone is not LTE capable. That's it. Now, if i put previous unactivated SIM card, it won't go back to 4gLTE; unless I get new, never used SIM.

One can see from two screens(screen capture attached) by comparing two scenarios(4gLTE vs 4G) by going into hidden screen. Dial *#*#4636#*#* and than phone information.

1. When 4gLTE working, "network type" = LTE

2. 4G working than "network type" = HSPA.

T-mobile somehow re-sets "network type" configuration in phone from LTE to HSPA thinking this phone is not LTE capable.

Someone posted; root, stock JB, change build.prop(ro.radio.networkmode=enable), AT&T SIM(?) able to change "network mode" to gsm/wcdma/lte to stick LTE.

Also, With 33-84 hybrid radio mainly and Paulicat AOSP 4.4.2 on T-Mobile LTE work. 33-84 hybrid radio - http://xdaforums.com/show...64&postcount=2
[AT&T LG Optimus G] besweeet:
Interesting finds.
[AT&T LG Optimus G] Ace42:
Hmm I knew it was TMO blacklisting the phone. I only had LTE the 1st day I owned the phone, but I didn't think to try a new SIM card. Too bad I can't buy a new SIM every time LTE dies.
[AT&T LG Optimus G] Nick N:
So you think they specifically blacklisted this phone, or carrier specific phones in general? Nexus 4 is not carrier locked (from Play store) and Verizon G2 comes factory unlocked and both access LTE just fine after a few tweaks of course. Maybe it is just AT&T exclusive phones?

Was anyone who did the Nexus 4 conversion able to access LTE for an extended period of time?
[AT&T LG Optimus G] Ace42:
It's hard to say. The nexus 4 has no problem. I have both & can switch to my nexus & get LTE. There's something about this phone that causes this, the att iPhone 5 is allowed to usr LTE on T-Mobile.

Sent from my Optimus G
[AT&T LG Optimus G] rashp12:
Anyone experimented changing in JB stock build.prop(stock rom?) from the ro.radio.networkmode=disable to ro.radio.networkmode=enable. This suppose to give additional selection for choosing "preferred network mode" under "mobile networks" (Settings->Tethering & Networks->Mobile Networks->).
[AT&T LG Optimus G] Ace42:
I don't see any new menus after adding this to vanir. Might need LG ROM.
[AT&T LG Optimus G] rashp12:
Works on sock JB. Also, need to make sure after changes and re-boot device, the changes in build.prop stays. Moreover, using the dialer "secret code"(*#*#4636#*#*) to switch the network modes is normally locked by AT&T LGOG and changes will not stick without root.

Without root and build.prop changes, following is what you will experience under network modes.

Network Mode	Change/Save allowed

Automatic	OK

WCDMA 800	FAIL

WCDMA 850	OK

WCDMA 900	FAIL

WCDMA AWS	FAIL

WCDMA 1900	OK

WCDMA 2100	OK

GSM 850,900,1800,1900	FAIL	(OK if GSM set in RAT selection)

LTE Only	FAIL
[AT&T LG Optimus G] evnaglions:
Does that mean you got LTE working with the changes to build.prop on stock JB?

I am still unable to connect to LTE with the build.prop change. Are you using a different radio firmware?

I did notice 2 things that was strange:

1) I had a lot less options in terms of Preferred Network Mode (GSM Only, WCDMA Only, GSM/ WCDMA Only, and GSM/WCDMA/LTE auto)

2) I couldn't select the radio band on through the secret code"(*#*#4636#*#*). I can select edit, but there is no dropdown of bands to select.
[AT&T LG Optimus G] Tornade0:
I've tried changing build.prop as well and forcing LTE connectivity but the end result is always "fail". I do not believe a workaround has been discovered for this yet.
[AT&T LG Optimus G] evnaglions:
It looks like from rashp12's screenshot, he got LTE to work. I also can't connect to hspa+ via wcdma aws spectrum. I am thinking that I need to flash my radio to the .33 hybrid radio since it may have additional support to that spectrum/band, but I am not sure how to flash my radio without flashing my rom.
[AT&T LG Optimus G] Nick N:
Dear TMo,

Y U NO LET GEEB HAVE LTE LUV LONG TIME!?!

I was able to get LTE for a very brief period right after flashing AOKP and 33-84 hybrid radio a few weeks back. Before I could get a solid speedtest it dropped. I was using my regular micro SIM and had got LTE on my Bro's Nexus 4 before swapping back to the E970.
[AT&T LG Optimus G] Nick N:
Got this just now standing in my kitchen making chicken wings... First screen I was connected to WiFi, turned it off and ran the test.

Thought it might kick over to LTE but no...
[AT&T LG Optimus G] evnaglions:
Have anyone tried with stock JB and the .33 radio?

It seems from the forums that most of people that got LTE, got it over stock JB. I'm also curious about the ability to select band.

I know from a hardware perspective, the band 4 LTE is available, but is the firmware supporting that properly?