yashsingh1/xdaforums huggingface dataset:
[OnePlus 3 Questions & Answers] beni26:
Came here to say I have the same issue. Tried some of the suggested things like switching slots and changing the preferred network with no luck. Pretty frustrating seeing as I had no issues with my oneplus one. If it's not resolved soon by at&t, I'm going to reactivate my old sim and cut it down like someone else did.

UPDATE: Ok so called AT&T and they said my current IMEI is showing only 2G!!!! So what they did, and what you should ask for specifically if you call in, is for them to send your IMEI number to the IMEI range group and tell them that this is a LTE device. It can take up to 2 weeks for them to register the IMEI as an LTE device. He also was able to switch back my IMEI to my old phone and guess what... I HAVE LTE!!.. at least for a bit until they ping me. So after a couple weeks, I'll probably call back in and have then switch my IMEI back. Also make sure the plan you are on has LTE on it. Have them double check because when I added the oneplus 3 my plan changed to a non-lte plan.
[OnePlus 3 Questions & Answers] daneoleary:
How do you access APN settings? I've looked and cannot, for the life of me, find it.

---------- Post added at 01:42 AM ---------- Previous post was at 01:36 AM ----------

Found AT&T APN settings, but don't see them for my Project Fi/T-Mobile sim card. For AT&T, I was automatically on the nextgen APN and am getting LTE and 4G+ it seems.
[OnePlus 3 Questions & Answers] dmoses1969:
Wasnt hard at all. Just download a template and print it out or look at it real close online to figure out what needs cut off.
[OnePlus 3 Questions & Answers] Goronok:
Just about all factory unlocked phones will have this "problem." Best bet is to go into an AT&T store and ask for a new sim without the OP3 on you. If you can get the Sim setup with an AT&T branded LTE device and then move the sim over, you should be fine.

Like others have mentioned - never ever call a rep. Guaranteed failure.
[OnePlus 3 Questions & Answers] crowsnestitsupport:
No issues here after 3 days... LTE works fine and when I log into my AT&T account it shows my new op3 IMEI and unrecognized device.. but no LTE issues..
[OnePlus 3 Questions & Answers] droidrev71:
My bad.. Not paying attention..lol
[OnePlus 3 Questions & Answers] noobtoob:
I called and told the guy I was having issues with my phone and to change my imei back to an old device (an old garbage s4 I had lying around), and they did it on the spot. LTE is great now. If any of you have an old LTE capable phone lying around, call em up and tell them you only want your imei updated and they'll do it. I had zero issues with the rep. We didn't troubleshoot anything, just changed it, rebooted phone, done.
[OnePlus 3 Questions & Answers] budbay:
I cut my sim card down from my oneplus one using a template I printed. LTE is working fine for me so far, also using ATT Phone APN profile.
[OnePlus 3 Questions & Answers] HIcycles:
Anyone had success with the APN settings? I'm getting my today!!!
[OnePlus 3 Questions & Answers] noobtoob:
All APN settings were correct on mine out of the box. Only problem was the imei. If you can get away with not changing your old imei, then you should be good to go.
[OnePlus 3 Questions & Answers] JazzieBoi:
I cannot get LTE only H and H+... I have tried switching the sim from slot 2 to 1 and it didn't work. I am going to have to make a call to AT&T or stop over to a AT&T store.
[OnePlus 3 Questions & Answers] HIcycles:
Alright, so dumb question. If I use the sim from my current phone, I should be okay?
[OnePlus 3 Questions & Answers] TritonB7:
I used the same sim from my previous phone (Moto X Pure) and had no issues. I'm currently using Straight Talk (ATT) and have had no issues with LTE.
[OnePlus 3 Questions & Answers] Z51:
I'm on cricket. Mnvo of at&t and I have full LTE Service.

Sent From My OnePlus 3
[OnePlus 3 Questions & Answers] Retroactive:
I have same issue no LTE, only 3g+ come to think of it it maybe due to a old grandfathered unlimited data plan that I still have. Pps whom can't get LTE I wonder if it's for that same reason....
[OnePlus 3 Questions & Answers] jastao:
For my OP3, I cut down the sim card I am previously using on a nexus 5 and use it in the op3. I am still getting LTE but I can't make any calls. Yet the LTE is running perfectly. Anyone seeing the same lost voice issue?
[OnePlus 3 Questions & Answers] Optimus08:
I had the same issue after updating from note 4. As someone suggested above, I asked the rep at store to change phone back to note 4 but not the sim. After reboot, LTE works perfect! Hopefully, it lasts forever..I believe this is the only solution currently available. On a side note, its just a waste of time dealing with at&t reps. Those reps at store are so dumb, had no clue regarding unlocked phones. According to them, no other phones besides at&t locked and unlocked ones can get LTE services!!
[OnePlus 3 Questions & Answers] budbay:
I had same thing, I just rebooted and everything was as it should be.
[OnePlus 3 Questions & Answers] biglilsteve:
All you should have done is rebooted the phone. When you first boot the phone with a new sim, sometimes you'll have LTE with full bars, but voice doesn't work. Rebooting solved it for me twice.
[OnePlus 3 Questions & Answers] 3rdcoasttx:
ok so i have a oneplusone and absolutely love the phone itself, but with at&t my service drops in and out quite a bit. I live in the country so service is already spotty, but i notice when i use my backup cheapo at&t phone, i get better service. right now i am looking to upgrade, either to an at&t device, or to oneplusthree.. i would rather the oneplusthree but dont want to continue with the bad reception.. soooo how has yall signal been so far? now that it supports all at&t lte bands notice a differnce? thoughts?
[OnePlus 3 Questions & Answers] Joe Mustard:
I live out in the sticks too.... I was using a Nexus 6 with spotty service and switched to the OP3. The OP3 most definitely out performs the Nexus 6 when it comes to service.

You can always call up ATT and complain until they give you a microcell for free.
[OnePlus 3 Questions & Answers] noobtoob:
I live close to the city, but cell reception sucks in my area until they "expand towers." But I can tell you it is night vs. day difference between 1+1 and the 1+3. My signal is stronger in every sense of the word. Just as others and myself have mentioned, all data issues affecting LTE is related to the imei. You need a rep good enough to change it in their end or if your lucky, cut your old sim down. My old some was from a note 3, and wouldn't cut down to nano, but I had a rep change my imei over the phone, and I'm up and running great.
[OnePlus 3 Questions & Answers] zelendel:
Ok guys Enough. I will say this only once. Advising people to commit fraud is not allowed here so please stop doing it.

Also you guys do know ATT reps monitor this site and more right?
[OnePlus 3 Questions & Answers] sohbins:
Here is my experience with Lte issue and hope it helps someone. Alright the first time I inserted the simcard on one of the Sim slot, I did not get the Lte even after trying setting up proper access points. I turned off the phone, remove the Sim tray and move the Sim card to another slot. Boom! Problem solved.
[OnePlus 3 Questions & Answers] J3COMPUTERSERVICES:
Just received my OP3 no voice all good after a reboot. LTE seems to be working we'll see if it works after a while.
[OnePlus 3 Questions & Answers] zxcv888:
I didn't even have to enter any APN settings. Lte works fine since I got the phone on 6/20
[OnePlus 3 Questions & Answers] thewalkingaust:
I took my OP3 into ATT with me to get a nanosim (moved over from an old HTC One X) and was stuck on H for the week. Called ATT today and it was an imei issue that was holding me back. A simple reboot after that and LTE! :good:
[OnePlus 3 Questions & Answers] balleron24z:
I don't see how simply listing the IMEI of another device as the one on your account is against TOS or anything. Especially if AT&T's system sweeps the IMEIs used on their network. Can't help that AT&T is also behind on their IMEI database, which affects the end user. If more reps knew how to change the data plan to the LTE one instead of the "4G" one, wouldn't be a problem.

For those who struggle with it, here's what happened back when I used to work for AT&T.

There are data plans for non-AT&T/unlocked devices, 4G and LTE are the 2 primary ones. Make sure your rep is picking the LTE one and not the 4G one, as that's just for H+.
[OnePlus 3 Questions & Answers] :
I finally received my OP3 today and ran across the exact same issue as most people here. I previously had an iPhone 6 on AT&T, so I popped that SIM into the OP3, it registered LTE at first, now here is the weird thing...when trying to actually pull any data down, the LTE indicator would switch to say 4G+.... then, when the data transfer was completed, it would toggle back to LTE. If I let it sit there it would just say LTE, but anytime data was sent across, it would toggle down to 4G+, then switch back to LTE very quickly.

Anyways, AT&T's system picked up very quickly that I'm not using an iPhone anymore, and since their system doesn't recognize this device, it put it into 2G mode. Since the device doesn't support 2G, it just showed cell bars with no data indicator. I called AT&T and did exactly what beni26 did back on page 5...have them re-provision it with the old IMEI and put an order in to have this phone labeled in the system as being LTE capable. He said this may take a few weeks to do, in the meantime if the OP3 falls off of AT&T again, I can always call back and have the iPhone IMEI put back in.

However, it is still having the issue when actually pulling data, it toggles from LTE to 4G+...has anyone else seen this issue?
[OnePlus 3 Questions & Answers] zelendel:
Then you don't understand how a TOS works. By lieing about the IMEI on the plan you are talling att you are using another device. Which is fraud in the company. There are reasons why it might not work or for ATT not to have it use that plan.

Either way it is up to them as to what devices run on 2hat parts of their network.

Carriers only care about the devices they carry. It's been the same for over a decade.

Anyone ever look to see if the device is cert by the fcc to work on that band? Just because a device can doesn't mean it is certified to do so. Mainly a device from China where the rules are very diff.

All I see if people Complaining that something doesn't work the way 'they' think it should. So instead of trying to find the reason or explanation they decide to lie and commit fraud.
[OnePlus 3 Questions & Answers] dm36415:
I have this issue as well, had to get a new nano SIM from the AT&T store, end result was no mobile data at all. After an hour long chat session with AT&T online, and their internal escalation, they temporarily fixed the issue (at their suggestion) of using my old IMEI until they could get my new on added, which they entered an internal ticket for, and stated it would take up to 48 hours. Stuck with HPSA+ for the time being, I'll report back should this get rectified.

Thanks everyone for sharing your stories & tips regarding this issue. Hopefully someone will get and post the resolution soon that we can all use it.
[OnePlus 3 Questions & Answers] bricky23:
Well I just popped the sim in that I was using in an iPhone 6s, and it works. 2 weeks, and no problems.
[OnePlus 3 Questions & Answers] SquireSCA:
I called att support because while popping in my lte SIM card got me on their network, with lte, I could not get visual voicemail to work.

The tech on the phone said no problem, and he copied and pasted the imei code from my wife's note 5's imei and it worked. The tech said it was one of the workarounds that they use with non att phones...
[OnePlus 3 Questions & Answers] zelendel:
Which he is not supposed to do. This is why a global IMEI blacklist will not work. Which is why it makes stolen cell phones such a lucrative market.
[OnePlus 3 Questions & Answers] SquireSCA:
Well, he offered to, and said that it would take up to 2 weeks for my 1+3 to have its IMEI get approved and into their network tables, so this was how I would get full functionality in the interim.

I wasn't gonna argue with him, he fixed my setup so that my phone would work...
[OnePlus 3 Questions & Answers] biglilsteve:
There have been countless people in this thread that said ATT said it could take up to 2 weeks to get the IMEI registered as LTE.

It's been almost 3 weeks since this thread has been started. Has anyone had their OP3 IMEI successfully registered as an LTE device?

And which IMEI are you guys providing? The 1st or 2nd?
[OnePlus 3 Questions & Answers] SquireSCA:
I think I gave them first SIM's IMEI... But I don't know when it will get in there, and mine is working on my wife's IMEI anyway...

I asked the tech, "Will having two phones on the network with the same IMEI cause a problem?"

He said no, that while their network will scan for blacklisted and stolen codes, it doesn't check for duplicates...
[OnePlus 3 Questions & Answers] :
Also, you would think once it is added into their system, it would affect everyone? Why are we having to do this individually?

I provided the SIM tray IMEI where the SIM card resides.
[OnePlus 3 Questions & Answers] biglilsteve:
I think this is why moving the card to the second SIM slot worked for me. I originally started in the 1st slot. The phone had LTE and worked fine until the guy on ATT's end took my new Slot 1 IMEI and entered it into the system. Even once he put my old Nexus 6 IMEI back into the system, I still could only get H from SIM 1.

Since I never gave ATT SIM 2's IMEI, they haven't "caught onto it", which is why SIM 2 works for me.

It's just annoying because when I get calls, it says "(SIM 2)" next to the caller. A small part of me is extremely irked by this.

Bottom line...should have never called ATT. Everyone on this thread that had a smooth transition with LTE has one thing in common: they just put the SIM in the phone and never called ATT to notify them of the change. Learned my lesson.
[OnePlus 3 Questions & Answers] :
You can rename the SIM if you go to Settings --> SIM Cards --> and tap on whichever SIM (not the on/off toggle but on it's name), a box will pop up where you can rename it. I named mine AT&T so that shows everywhere now.

Also, their system would have detected it eventually. My data was turned off by their "IMEI sweep" and I had to call them and do like most people here by having them assign my old phone IMEI to it and they put in to the IMEI team to permanently activate my IMEI as an LTE device, which takes a few weeks apparently.
[OnePlus 3 Questions & Answers] Alex240188:
This is just a display preference.

LTE = 4G

My Nexus 5 displays 4g. (some custom ROMs show LTE)

My OP3 displays LTE

They are both the same.

4G+ is actually LTE-A (LTE advanced) which is quicker than LTE.

It works much the same way as H & H+ did back when that was the mainstream.

Your device will stay on LTE (4G).

When it has to do any downloading it will change over to the faster LTE-A (4G+)
[OnePlus 3 Questions & Answers] :
Yeah I figured it out a few threads back. Never seen "4G+" mentioned in the USA, nor LTE-A for that matter, everything is just advertised as LTE. The more you know...

At least they fixed the icon alignment in the 3.2.1 update when it would toggle between LTE and 4G+.
[OnePlus 3 Questions & Answers] nightfox7:
Okay so I have had my OP3 for a bit over a week now, I got a new nano sim and activated it when I got my OP3 (with my OP3's IMEI). It shows that I am getting LTE, but it seems slow to me, I'm never able to get more than 5mbps with about 60-70% signal strength.

So am I really getting LTE or does my phone just think i'm getting LTE? It seems like on my previous phone I was getting faster speeds..
[OnePlus 3 Questions & Answers] mizzezjonezee:
Please tell me what your apn settings are..please send me screenshots..I am in desperate need of help. Thanks
[OnePlus 3 Questions & Answers] crowsnestitsupport:
There you go! AT&T has worked great from day one for me.
[OnePlus 3 Questions & Answers] mizzezjonezee:
Thanks so much. I tried everyone's suggestions on this forum but my phone was still stuck on H and not even H+. All I had to do was call ATT customer service and after about 30 minutes, the rep finally found a workaround after trying everything possible to figure out why my OnePlus 3 wasn't registering as a 4G LTE device. Now I have LTE and 4G+ when browsing the web or pushing for any other type of data. I love my new phone!
[OnePlus 3 Questions & Answers] milespro:
Does this effect volte? I can't seem to have LTE while on phone calls. How do we enable that?
[OnePlus 3 Questions & Answers] juancarlos5:
one question.

You have a nano sim or cut your micro sim?
[OnePlus 3 Questions & Answers] mizzezjonezee:
Nano sim
[OnePlus 3 Questions & Answers] ERoels23:
How did they do that???

It sounds like I am currently having the exact same problems that you were having, only H, not even H+. I have visited many stores and talked to a LOT of service reps, but none of them have found the workaround that your rep found. If you could tell me anything about what he did, it would be a huge help, and it would make customer support go a lot faster.

Thanks!
[OnePlus 3 Questions & Answers] mizzezjonezee:
Im sorry but he didn't go into details about what he did. Wish I had asked. I believe he used the settings from the first OnePlus because it had LTE. I knew for sure he tried everything he possibly could because I remember having to reboot my phone a dozen times for the new settings to kick in until something finally worked.
[OnePlus 3 Questions & Answers] gmac1990:
I've posted another thread about this but was wondering if anyone is getting inconsistent signal strength. Idk if maybe these issues are linked? I get lte at times but it's inconsistent. One second it's really strong and the next second it's weak. Are these issues related?
[OnePlus 3 Questions & Answers] issasaurus:
Wow, AT&T is not my friend at the moment.

I can't remember if LTE worked right off (got in July). Brought my new oneplus 3 to AT&T store to get a new SIM since old one was micro. More recently realized I'm not getting any LTE. In store they had no clue, said to call. Tried a chat, literally broke my data. Tried another chat and escalated. Got 3g back. Told them I could pop my wife's SIM in and get LTE no problem. They said I needed to go to store and try a new SIM because this one wasn't allowing LTE. I'm def on an LTE plan and they have the imei registered as an LTE device. She couldn't guarantee LTE service would ever work on a non AT&T phone. Which is ironic because the only reason I shopped around was their removal of 2 year contact plans! She also said VOLTE definitely would not work. Which I'm ok with I guess but haven't investigated.

ANYWAY, after reading this thread, tried popping SIM into second slot and BOOM, LTE. Let's see if it sticks. If not, the other posters suggestion is what I'll do next. Go to store WITHOUT phone. Say you called and rep told you to pick up a new nano but you don't have phone on you. This should do the trick as well. These people are a combo of idiots trained by corporate scam artists. No, I'm not going to over pay for a phone to get the quality of service I'm paying for and have been for 13+ years.
[OnePlus 3 Questions & Answers] biglilsteve:
Your problem was registering the imei. Don't do that anymore. Your 2nd slot works because that imei isn't registered.
[OnePlus 3 Questions & Answers] issasaurus:
Yes exactly. It's BS.
[OnePlus 3 Questions & Answers] biglilsteve:
Completely agree. Att is being pretty.

If you want, you can get a local store that activate a new sim for you and it will work in slot 1. I had to use slot 2 for awhile but got the new sim and ive been back on slot 1 since July.
[OnePlus 3 Questions & Answers] issasaurus:
That's my plan. Do you know anything about the volte thing? Is it something that's not supported by the device or AT&T's dickery?
[OnePlus 3 Questions & Answers] biglilsteve:
Last I checked, which was several months ago, the only devices that support volte on att are iPhones.
[OnePlus 3 Questions & Answers] issasaurus:
Figures. Thanks for replying! Hopefully these posts will help someone with their new oneplus 3/3t. What I don't understand is why I couldn't find this thread until now. I must've searched a million times before.
[OnePlus 3 Questions & Answers] biglilsteve:
It was frustrating that's for sure! And this issue isn't just limited to the OP3. I bought an Axon 7 about a month after the OP3 to try. Exact same issue.
[OnePlus 3 Questions & Answers] rauleeros:
So just to make sure... I am getting 2 new SIM cards from Straight-Talk: 1 AT&T and the other is T-Mobile. I got both just in case one wouldn't work. So what you are suggesting is that to register/activate the SIM card (either At&T or T-Mobile) I should use another phone with LTE, then once I get it working with LTE, just put it into the O+ 3T?

...but what if I don't have any other phone to activate my SIM card?
[OnePlus 3 Questions & Answers] biglilsteve:
Your sim should work fine. Just dont give your imei to att. Or give att an imei from an old phone if they need one to activate the sim.
[OnePlus 3 Questions & Answers] 2015Ducatimulti:
I ditched my s7 edge for the oneplus 3 and I changed nothing and swapped in my sim card from my s7 edge , and I can not get LTE, so I went back to ATT and gave them the IMEI# of LG V10 and used bunch different APN`s and nothing works, I`m still on H no LTE.
[OnePlus 3 Questions & Answers] rauleeros:
Working perfectly!

After 2h of talking to Straight Talk, we got my SIM card of AT&T working. First the problem was with the SIM not being activated, then I did not get any calls. After some more changes and reboots, my phone was getting 4G(+) but no calls. One more reboot did it and then I got the 4G(+) and calls.

However, and I do not think this is a problem, my 4G drops to H+ every time I have an income or outcome call.
[OnePlus 3 Questions & Answers] biglilsteve:
Dumb question: did you reboot your phone? Usually when first slipping in the sim, the phone only gets H. A quick reboot gives you LTE. No tinkering with IMEI or APNs should be required.
[OnePlus 3 Questions & Answers] 2015Ducatimulti:
yeah I did that first I just swapped in my sim and rebooted, I had a OP3 before and didn`t have this problem, popped in my sim and it just worked, this OP3 it will not, I have tried everything under the sun and even the sim slot 2 and its no go

---------- Post added at 02:35 PM ---------- Previous post was at 02:33 PM ----------

yeah I did that first I just swapped in my sim and rebooted, I had a OP3 before and didn`t have this problem, popped in my sim and it just worked, this OP3 it will not, I have tried everything under the sun and even the sim slot 2 and its no go, also I bought this brand new from amazon and they it`s the international version but I know the A3000 that is sold international and the one sold from OP website are the same from my research.

---------- Post added at 03:29 PM ---------- Previous post was at 02:35 PM ----------

funny thing is I can take my sim card I had in my S7 edge, and put that back in back in my son`s s7 edge...... and he gets LTE no problem with his ATT S7 edge, but I put my sim back in the OP3 and all I get is H........ no 4g+ or H+ have tried the ATT phone APN, and the NXTGEN APN and noting all I get is H and I have 4g(lte) selected to. ATT told me the 7th might keep it and see if no Lte after that then it goes back, I have bought all kinds of other unlocked phone from sony, moto and honor 8 and never had issue with getting LTE service they always just worked.
[OnePlus 3 Questions & Answers] 2015Ducatimulti:
looks like i found the problem i bought the international version from Amazon and i checked my son`s S7 edge with Lte discovery and it shows band 30, which the OP3 international version doesn`t support, so its going back to Amazon.:(
[OnePlus 3 Questions & Answers] biglilsteve:
Ahh yes make sure you get the A3000.
[OnePlus 3 Questions & Answers] 2015Ducatimulti:
from what I read that all of them are A3000, but you have to make sure u get the correct A3000.