Develop Bugs

[Q] Can I Use My Rooted SGS2 In Europe?

Hi All,
Does anyone know if I can use my rooted SGS2 over in Europe? Specifically I'm using a rooted T989 running TDJ's Darkside Evolution 3 v7 with the venom kernel and the Touch0Color theme. I'm going to the Netherlands, where I think I can just get a local Tmobile (NL) sim and be fine, and the Romania, where I believe the phone will work on the Orange network.
Since the phone is rooted, it should also be unlocked, so there shouldn't be a hitch in just switching the sim and being up and running, correct?
Any thoughts, and especially first hand experience, would be appreciated.
I just want to make sure I'm not missing something completely obvious that makes simply buying the cheap $15 throw away the better option.
Thanks,

That's correct. Just call tmo for the unlock code...tell them the truth-you're going overseas. When you get there get a local SIM and pop it in.
Sent from my SGH-T989 using xda app-developers app

your phone should work in with any gsm carrier to make phone calls but your phone has to be unlocked. I dont know how the data will work since most gms carriers frequency bands are different from Tmobile's.

Ok, so I went to T-Mobile as instructed, and they said they would get back to me in 14 days (I know, right?). So they just sent me the below.
What should I do? I'm still wondering if the phone is just blanket unlocked as a result of the root and the new rom, but I'd prefer not to go buy a prepaid AT&T sim to find out. Can anyone out there advise?
Here's what T-Mobile sent me.
BEGIN
T-Mobile Phone #: 5********9
T-Mobile Sim Unlock Request
Sim Unlock Reference: 5*****6
IMEI: 3*************0
Thank you for taking the time to contact T-Mobile. Unfortunately, we are unable to provide the unlock code at this time. After review of the account we have determined that the device is not in use with the corresponding mobile number. T-Mobile policies and procedures state that the device must be in use on the mobile number requesting the unlock code. If this is a new device please allow 3-4 business days prior to submitting a new request to allow your usage to update in our system.
Thank you,
SIM Unlock Department
Thank You,
Sim Unlock Department
T-Mobile USA, Inc.
END
I checked the numbers twice, and they are correct. But, obviously, I'm using the number with the phone on t-mobile without a hitch ...
So I called T-mobile, and asked what's what. They said that they couldn't even see what my phone was on the system, and then suggested that I call Samsung. Samsung said that they couldn't verify ownership of the phone and said to call tmobile. So I'm wondering what's going on here. The tmobile rep did say that she doesn't think that I'd be able to use an AT&T sim even though I rooted my phone. How would they know though, isn't the normal android stuff unlocked?
Any thoughts?

"rooted" and "unlocked" are not same terms.
I have rooted my phone and requested Unlock code from t-mobile before my trip to russia. Their policies state that you have to be t-mobile's customer for at least 40 days.(though because of circumstances they gave it to me on 39th day)
In russia I bought local sim card, slip it in my S2, followed an instructions provided by t-mobile and had no problems to place/receive calls and use an Internet. Though speed was 3G.

First, Rooted it doesn't mean Unlocked! They are 2 different operations.
You can be Rooted but NOT Unlocked, you can be Unlocked but NOT Rooted
and you can be Rooted AND Unlocked.
That being said, I beleive you have to be on Stock ROM when you
request the unlock code. With a custom ROM they don't recognize
your phone.....
If you don't want to flash back to stock until you get the code, then I would
go to a local cell phone store (not a company, just a local that sells
phones for all major carriers) and ask them to unlock it for you.
It should take about 5 min. and should cost about $20.
You can also go in Romania and unlock it there for about $5.
I know nothing about Netherlands, but it should be the same.....
Good luck and have a nice vacation.

SIM Unlock/Root Questions

Firstly, I'll say I'm new to XDA so thanks to all those who offer people like me somewhere to turn to. So, a little back-story, I recently got the root itch after my last ATT upgrade and it would seem it couldn't have come at a worse. For I had just recieved my ATT Galaxy s6 Edge Plus two days prior to being introduced to this site. Needless to say, I put too much effort in finding other devices essentially to "play" (root, flash, etc..) then I should. Which brings me to this...I came across this Sprint HTC 10 still with the plastic on it for a price I couldn't refuse. While trying to go about Unlocking the SIM I've encountered two issues: one being I paid to get an unlock code (actually double due to "high level of security") which ends up saying unlocked from network in a pop up but when I reboot with different carrier SIM, it still says SIMlock Enabled. So, Secondly, I figured try my chances calling Sprint even though I didn't have any of the sellers information. Only to find out, according to her, that phones aren't even elligible to be SIM Unlocked unless they have been active with the carrier for atleast 50 days. I would reallly appreciate if someone could shed light on this and let me know, since I bought it out the box and don't have Sprint, did I just buy an expensive paperweight? Also, if anyone could point in the direction of an effective SIM unlock method, it would be appreciated. And lastly, would rooting it make it easier or expand my options of SIM Unlocking? Thanks for any input.

I haven't tried sim-unlocking this phone but I usually get unlock codes from reputable sellers on eBay. If the code you received doesn't work, I would ask for my money back or ask the seller to help me troubleshoot the issue.

The source seemed to be a reputable and were extremely professional, (HTCunlockingservice.com), and said they got the code straight from Sprint server. I just don't understand why the code won't work. Any knowledge of how factual the service reps statement that if it hasnt been active for 50 days, it cant be unlocked?

How to unlock att s9 to use with another carrier?

What is the proper procedure to unlock an att s9 to use with another carrier?
Thanks.

Just to clarify. This phone was purchased from Samsung directly with the new $150 discount for Att branded phones.

RossTeagan said:
So the phone is bought from samsung but lock on att?
Try the following to check if your phone is network locked be sure you really need to unlock it (otherwise, I don't think you need to unlock it).
1. Insert a GSM SIM card from another network (a non-AT&T SIM, liek Cricket ot T-Mobile)
2. Try placing a call
If your phone manages to connect and make the call with this other SIM card, then you won't need to unlock it, as it's already unlocked. And if the phone is locked, I recommend you check with AT&T, given that this phone is not tight to a contract.
Click to expand...
Click to collapse
I don't have the phone yet (2 more days,) but I did an extensive Google search, and it seems like this particular phone will be sim locked. It's paid off outright, no contract or anything, but there were several heavy discounts like $150 off msrp and another $150 off for trading in S6.
My Google search gave me two possible options -
1) Talk to ATT and ask to unlock,
2) Use an unlock site, like DeviceUnlock, pay 20-50 dollars for them to obtain and send an unlock code to you.
As for #1, I saw a post where a guy complained that talking to ATT and Samsung was useless to him in a similar situation - each company sent him to the other one to get it unlocked, so he got nowhere with this option.
Also, I saw a few posts that said that a locked phone may have to be activated on ATT first and used for up to 40 days before ATT will unlock it for you. What would happen with this Samsung bought phone though?
And for #2, I just don't know how this kind of business works - you send them IMEI and the locked carrier info, pay money, and a few days later, they send you an unlock code that you can enter yourself.
Is it safe? How does it work exactly? What if there's a problem because the IMEI is not actually registered on ATT because the phone was sold by Samsung?
I have many more questions, just because I don't know what I am talking about, but the bottom line is this. What should I do?
Thanks.

AS your phone is paid off and there is no contract on it, you should stick with your first option: ask att to unlock it but as you said you will need an activated phone, so you will need to activate the phone with att, however, you should go to them immediately and not wait for 40 days. While Samsung locked the phone, the actual company who controls the lock and who has authority of unlocking it att. So don't let them fool you to go search the code somewhere else.
Also, there is a law in the US that forces operators to unlock your phone if there are no debts or contract on your device. So keep that in mind.
Regarding third parties, they are a shortcut and you just have to provide them the devices IMEI and network lock. They, in turn, will look for the unlocking code for you. And if there are issues, as you said, I think you can ask for a refund (so if you decide to go for such a service, first make sure they have a money back guarantee).
TLDR Go with att, they should (have to) provide the unlock for you

Hi nabbed,
did you manage to unlock it?
what did you do in the end?

Giskardors said:
Hi nabbed,
did you manage to unlock it?
what did you do in the end?
Click to expand...
Click to collapse
I called ATT, spoke to tech support. The tech said that since I had no history/account with ATT, they had to make one to verify that the phone IMEI was clean. He created a new account - name, address, phone, email, imei etc info. He created a support ticket (and gave me its number) for sim unlock. He said that I should receive an email within 48 hours that would either tell me that I cannot unlock or will come with the unlock code (if it is decided that I should be able to unlock.)
I tried using their default web service for getting an unlock https://www.att.com/deviceunlock/#/unlockstep1 but that thing doesn't work - the Next button cannot be clicked.
If unsuccessful, I am considering going and talking to a retail ATT store representative directly. They probably don't know much, but perhaps they can be more convincing on the phone with ATT.
Third option is trying one of the unlock websites.

So I had to do this with my S9, same kind of situation as you (I have T-Mobile service, received an AT&T locked device).
As you know, the web portal won't work. AT&T never entered your IMEI in their database, so as far as THEY are concerned, your phone doesn't exist.
Call tier 2/advanced tech support and have them create a case with the Device Unlock Team. GET A CONFIRMATION NUMBER. You should receive an email confirming that the case was made.
48-72 hours later, you SHOULD have an unlock code. Should. This is AT&T, and they don't know their ass from their elbow. It took me 2 weeks.
Device unlock services didn't work, as the IMEI has to be in AT&T's database for it to work correctly. They'll just (hopefully) refund your money when it fails.
Don't go into an AT&T store. As a former AT&T retail employee, I can guarantee you, those employees are dumber than a bag of wet hammers, and have no way of helping you with this, whatsoever. In addition, since you're not BUYING anything, they're not going to help too much even if they could.
Good luck. It will work for you eventually.

entropism said:
So I had to do this with my S9, same kind of situation as you (I have T-Mobile service, received an AT&T locked device).
As you know, the web portal won't work. AT&T never entered your IMEI in their database, so as far as THEY are concerned, your phone doesn't exist.
Call tier 2/advanced tech support and have them create a case with the Device Unlock Team. GET A CONFIRMATION NUMBER. You should receive an email confirming that the case was made.
48-72 hours later, you SHOULD have an unlock code. Should. This is AT&T, and they don't know their ass from their elbow. It took me 2 weeks.
Device unlock services didn't work, as the IMEI has to be in AT&T's database for it to work correctly. They'll just (hopefully) refund your money when it fails.
Don't go into an AT&T store. As a former AT&T retail employee, I can guarantee you, those employees are dumber than a bag of wet hammers, and have no way of helping you with this, whatsoever. In addition, since you're not BUYING anything, they're not going to help too much even if they could.
Good luck. It will work for you eventually.
Click to expand...
Click to collapse
Thanks.
The tech guy didn't say what kind of a support ticket he created. It may have been a general support ticket, or maybe he referred me to the unlock team directly, I don't know. He seemed like he understood perfectly what I needed. Anyway, the ticket format is like this - cm10230128_122673352, does that look right?
I have received an email confirmation that the call was made, but not that the case was created yet. The call ended at 5:30pm CDT on a Friday night, so maybe it would take until Monday to get a confirmation?

nabbed said:
Thanks.
The tech guy didn't say what kind of a support ticket he created. It may have been a general support ticket, or maybe he referred me to the unlock team directly, I don't know. He seemed like he understood perfectly what I needed. Anyway, the ticket format is like this - cm10230128_122673352, does that look right?
I have received an email confirmation that the call was made, but not that the case was created yet. The call ended at 5:30pm CDT on a Friday night, so maybe it would take until Monday to get a confirmation?
Click to expand...
Click to collapse
Maybe it will take up to tuesday. That's the limit
Im going to the US for 2 weeks, I dont know if i'll be able to unlock it on time, but If I order it I'll get it on the 2nd week.
I really hope you can unlock it!
Keep us updated

Update:
Got the unlock code in an email. The instructions say "Please allow 24 hours upon receipt of this notification to complete the unlock process." Not sure what that means, gonna try to unlock tomorrow with a project fi sim.

Update2:
Phone unlocked fine with a Project FI sim card and connected to T-mobile.

We're on the same boat!
I'm also on Project Fi and I received my AT&T S9 today.
My IMEI was found in AT&T's database and I just submitted the unlock request.
Do you experience any issues when using S9 w/ Project Fi?

zenlifexxa said:
We're on the same boat!
I'm also on Project Fi and I received my AT&T S9 today.
My IMEI was found in AT&T's database and I just submitted the unlock request.
Do you experience any issues when using S9 w/ Project Fi?
Click to expand...
Click to collapse
I just used the Fi sim card to facilitate the unlock procedure (the S9 is not mine, it's for a friend, and I am just setting it up.) I just looked at sim status in the options to confirm that provider was T-Mobile. In my research, I read that using Project FI T-Mobile was no different from any other unlocked gsm phone using T-Mobile. You will lose all Project FI apps because they don't exist with non-Google phones. There will not be carrier switching between T-Mob, Sprint and US Cell, and there will not be wifi calling. But if your T-Mob service is already good, there shouldn't be a problem.
As as side note, my own FI service is kind of awful. Ever since Google introduced "preferred partner" feature, where a FI phone would connect not to the strongest signal carrier but rather to a particular carrier, in this case Sprint in my area, I have had really bad sound quality.
US Cellular has best towers in this area, with signal strength of -70-80 db or so, while Sprint has crappy towers with signal strength of less -100 db. Yet I am constantly connected to Sprint with crappy sound quality because they are the preferred partner here. I have to constantly to remind myself to manually switch to US Cell if I'm to make a lengthy phone call.
Good luck.

SIM unlock lost by LG repair - hard to get back

A small warning here for those who need to send a previously SIM unlocked H932 in for LG repair:
After breaking its glass back, I had to send my TMO V30+ in for repair at LG’s center in Texas. At the same time I asked them to replace the screen under warranty, since there was a small cluster of dead pixels just above the navigation bar. They did all that. Cost $88 (including free shipping) with 11 days turnaround.
They also managed to lose the SIM unlock which I had previously been granted by T-Mobile using their Device Unlock app. Realizing this could be a problem, I had included a letter to LG Repair where I begged them to preserve the SIM unlock. Needless to say, the phone is paid off and all bills were paid (including the extra month TMO auto-charged my credit card and refused to refund).
After receiving it back, my Red Pocket GSMA SIM (AT&T prepaid MVNO) only does 3G, not LTE. The TMO Device Unlock app says the phone is “network locked” and not eligible for unlock.
T-Mobile Customer Service first requested unlock instructions to be emailed to me. After 2 days I received an email saying I had to use the TMO Device Unlock app. Duh. After much experimenting on my own (including with my now inactive TMO SIM card) I went to the T-Mobile store where I bought the phone. They were keen to help, but unable to solve the problem. We did confirm that with an active TMO SIM, everything was fine.
I then called TMO Customer Service again, this time asking for Tier 2. Here they finally escalated the case and requested an unlock from LG and said to expect a solution within 72 hours.
Different from the issue reported by @michy21 in this thread mine is the SAME phone with the same IMEI; it was just wiped by LG repair in a way that lost the SIM unlock. OR it really is a new phone or motherboard and they transferred the IMEI.
I should add that there has been no pushback or reluctance to help from any T-Mobile staff. It’s just that the company has baked everything so hard into the Device Unlock app now, so no human is able to do anything.
The only lesson here is to never buy carrier devices -- as @ChazzMatt has been stressing all along, and as I had been practicing myself in my Nexus days. But unfortunately carrier devices are where the best deals are -- which is the only thing that made it possibly for me to buy this class of phone in the first place.
I'll update this thread with the final outcome. Fingers crossed. I’ll be traveling overseas soon, really hope to have it fixed before.

TheDannemand said:
A small warning here for those who need to send a previously SIM unlocked H932 in for LG repair:
After breaking its glass back, I had to send my TMO V30+ in for repair at LG’s center in Texas. At the same time I asked them to replace the screen under warranty, since there was a small cluster of dead pixels just above the navigation bar. They did all that. Cost $88 (including free shipping) with 11 days turnaround.
They also managed to lose the SIM unlock which I had previously been granted by T-Mobile using their Device Unlock app. Needles to say, the phone was paid off and all bills were paid (including the extra month TMO auto-charged my credit card and refused to refund). Realizing this could be a problem, I had included a letter to LG Repair where I begged them to preserve the SIM unlock.
After receiving it back, my Red Pocket GSMA SIM (AT&T prepaid MVNO) only does 3G, not LTE. The TMO Device Unlock app says the phone is “network locked” and not eligible for unlock.
T-Mobile Customer Service first requested unlock instructions to be emailed to me. After 2 days I received an email saying I had to use the TMO Device Unlock app. Duh. After much experimenting on my own (including with my now inactive TMO SIM card) I went to the T-Mobile store where I bought the phone. They were keen to help, but unable to solve the problem. We did confirm that with an active TMO SIM, everything was fine.
I then called TMO Customer Service again, this time asking for Tier 2. Here they finally escalated the case and requested an unlock from LG and said to expect a solution with 72 hours.
Different from the issue reported by @michy21 in this thread mine is the SAME phone with the same IMEI; it was just wiped by LG repair in a way that lost the SIM unlock. OR it really is a new phone or motherboard and they transferred the IMEI.
I should add that there has been no pushback or reluctance to help from any T-Mobile staff. It’s just that the company has baked everything so hard into the Device Unlock app now, so no human is able to do anything.
The only lesson here is to never buy carrier devices -- as @ChazzMatt has been stressing all along, and as I had been practicing myself in my Nexus days. But unfortunately carrier devices are where the best deals are -- which is the only thing that made it possibly for me to buy this class of phone in the first place.
I'll update this thread with the final outcome. Fingers crossed. I’ll be traveling overseas soon, really hope to have it fixed before.
Click to expand...
Click to collapse
Worst comes to worst, sell the phone on eBay while at the same time buying one of the mint LS998 V30+ for $320. Immediately convert to carrier unlocked US998, bootloader unlock and root.
In the eBay listing for this phone stress the T-Mobile band 71, blah, blah, blah -- which you don't need on AT&T MNVO, but would interest T-Mobile users.
Sent via open market LG US998 V30/V30+

ChazzMatt said:
Worst comes to worst, sell the phone on eBay while at the same time buying one of the mint LS998 V30+ for $320. Immediately convert to carrier unlocked US998, bootloader unlock and root.
In the eBay listing for this phone stress the T-Mobile band 71, blah, blah, blah -- which you don't need on AT&T MNVO, but would interest T-Mobile users.
Click to expand...
Click to collapse
Thank you, Chazz!
I had a suspicion you might suggest that :laugh:
But yes, that would have to be the outcome if I cannot solve it. I'll probably file an FCC complaint first, which michy21 reported had solved her problem. But again, there is no pushback from anybody, which is a positive.
The only attachment I have to this particular phone is my 2 year warranty, which gives me peace of mind. A phone bought used wouldn't have that (or any warranty).
Thanks again!
Edit: Actually, it's not quite true that I have no other attachment to this H932: If/when T-Mobile rolls out B71 in this area, I'll probably give them another try, as they generally have far better network speeds. AT&T service here is acceptable (and widespread) but doesn't blow me away. We only switched because TMO couldn't reach through our concrete brick walls. Red Pocket supports all four carriers, so I can switch to TMO network on my current plan to take advantage of B71.
So my hope is I won't have to part with this phone. AND that @runningnak3d will release H932 root later this year

TheDannemand said:
A small warning here for those who need to send a previously SIM unlocked H932 in for LG repair:
After breaking its glass back, I had to send my TMO V30+ in for repair at LG’s center in Texas. At the same time I asked them to replace the screen under warranty, since there was a small cluster of dead pixels just above the navigation bar. They did all that. Cost $88 (including free shipping) with 11 days turnaround.
They also managed to lose the SIM unlock which I had previously been granted by T-Mobile using their Device Unlock app. Realizing this could be a problem, I had included a letter to LG Repair where I begged them to preserve the SIM unlock. Needless to say, the phone is paid off and all bills were paid (including the extra month TMO auto-charged my credit card and refused to refund).
After receiving it back, my Red Pocket GSMA SIM (AT&T prepaid MVNO) only does 3G, not LTE. The TMO Device Unlock app says the phone is “network locked” and not eligible for unlock.
T-Mobile Customer Service first requested unlock instructions to be emailed to me. After 2 days I received an email saying I had to use the TMO Device Unlock app. Duh. After much experimenting on my own (including with my now inactive TMO SIM card) I went to the T-Mobile store where I bought the phone. They were keen to help, but unable to solve the problem. We did confirm that with an active TMO SIM, everything was fine.
I then called TMO Customer Service again, this time asking for Tier 2. Here they finally escalated the case and requested an unlock from LG and said to expect a solution within 72 hours.
Different from the issue reported by @michy21 in this thread mine is the SAME phone with the same IMEI; it was just wiped by LG repair in a way that lost the SIM unlock. OR it really is a new phone or motherboard and they transferred the IMEI.
I should add that there has been no pushback or reluctance to help from any T-Mobile staff. It’s just that the company has baked everything so hard into the Device Unlock app now, so no human is able to do anything.
The only lesson here is to never buy carrier devices -- as @ChazzMatt has been stressing all along, and as I had been practicing myself in my Nexus days. But unfortunately carrier devices are where the best deals are -- which is the only thing that made it possibly for me to buy this class of phone in the first place.
I'll update this thread with the final outcome. Fingers crossed. I’ll be traveling overseas soon, really hope to have it fixed before.
Click to expand...
Click to collapse
That does not make sense at all. Has the device IMEI have changed at all? Was the actual logic board replaced? The answer is likely no. So why would the device be relocked by LG? You are giving them way too much credit.
More proof that the device should have remained unlocked is that you can access the device with your MNVO (ATT), if it was truly locked you would not able to get a signal or make a call under your MNVO at all. Sounds more like user error or a miss configuration of your carrier, or both.
Also you should not be trying to run a T-Mobile Specific device unlock app under a different carrier sim,
and it might just be reporting wrong information. Had this happen to me several times in the past, when the device was actually unlocked. You said yourself, you were able to use the device on (ATT)!

jblparisi said:
That does not make sense at all. Has the device IMEI have changed at all? Was the actual logic board replaced? The answer is likely no. So why would the device be relocked by LG? You are giving them way too much credit.
More proof that the device should have remained unlocked is that you can access the device with your MNVO (ATT), if it was truly locked you would not able to get a signal or make a call under your MNVO at all. Sounds more like user error or a miss configuration of your carrier, or both.
Also you should not be trying to run a T-Mobile Specific device unlock app under a different carrier sim,
and it might just be reporting wrong information. Had this happen to me several times in the past, when the device was actually unlocked. You said yourself, you were able to use the device on (ATT)!
Click to expand...
Click to collapse
Thank you. I understand where you come from. And no offense taken
The problem IS a SIM lock (or "network lock" as they call it). But not in the same way you're thinking where nothing works with an alien SIM. Both T-Mobile and LG have confirmed that.
Some details I didn't mention in my opening post (I meant to warn people here, not argue the matter):
1) LG warned me before they began repair that the phone would come back SIM locked, even though I'd included a letter asking if they could avoid it. I also talked to T-Mobile before sending it in, who said to just request an unlock code if needed (obviously that person was clueless).
2) I've seen other XDA users report how SIM locked V30s could connect on different networks, but NOT get LTE. That's what I am seeing too. One of my goals with visiting the T-Mobile store was to verify that there wasn't a problem with the phone itself preventing LTE. But once an active TMO SIM was inserted, everything works flawlessly.
3) I thought the same thing about not running the TMO Device Unlock app with the alien SIM inserted, but TMO's wording in the instructions they sent me are: "Before completing the steps below to unlock your device you must be connected to the internet via a cellular network in order to complete the steps", not mentioning it must be on TMO. And I DO have 3G internet with my Red Pocket SIM. Nevertheless, my second goal with visiting the T-Mobile store was so we could try the Device Unlock app with an active TMO SIM. And regardless of which SIM is inserted, the app reports that the phone is currently network locked and not eligible for unlock. When running this app on an unlocked phone, it shows the date of unlock -- even after a factory reset. They are obviously storing the lock/unlock state on the vendor, modem or carrier partitions or some such place. And on my phone it is in a locked state.
4) There is not much room for user configuration error here: The phone has been factory reset 5-6 times while testing this, with the only configuration being a Red Pocket APN. That same SIM and same APN work flawlessly in my Nexus 5 as well as my wife's V30 (also H932). Even if I mis-typed the APN, I wouldn't have done so 5-6 times -- and I would have caught it during one of the many times I verified the APN.
So I have no doubt that there is some form of network lock in place that is causing this. And again, T-Mobile and LG agree and have promised to solve it.
You are right that LG had no reason to replace the mainboard. But they did replace both the screen and the glass cover. I think it is possible that they sent me a refurbished phone with my IMEI transferred -- which would explain both their warning that the phone would come back locked, and why the Device Unlock app gets confused when seeing a blank (still locked) phone, but T-Mobile's IMEI database claims that the device is already unlocked (as I saw on the screen in the store).
So, we'll see if they manage to solve it or I have to sell this phone as suggested by Chazz.

Would paying a 3rd party carrier unlocking do the trick? Or does even that seem out of the question now? Before Frankensteining was a thing I did that so I could use an H931 on T-mo. It was $10 well spent as far as I was concerned.

jaysus145 said:
Would paying a 3rd party carrier unlocking do the trick? Or does even that seem out of the question now? Before Frankensteining was a thing I did that so I could use an H931 on T-mo. It was $10 well spent as far as I was concerned.
Click to expand...
Click to collapse
Thank you for the suggestion. I'd have no objection to that at all, but various reports on here had given me the impression that 3rd parties aren't able to unlock the H932 because TMO locked it down so hard (as is the case with Sprint, but for different technical reasons). I could be wrong about that, so definitely something to try.
Thanks again!

Update: It's been four days since I talked to T-Mobile and they promised to escalate my problem and request that LG provide a solution. They said to expect a response within 72 hours, but I haven't heard back from them.
But yesterday, when I tried popping in my Red Pocket SIM (it's in my Nexus 5 until this is solved) everything suddenly worked: Instant LTE, which stayed all day, even as I drove an hour away across town and worked there for a few hours (using hotspot), went on several errands, and back home all last night. LTE Discovery Log showed how it had switched seamlessly between towers, without ever losing LTE. I was certain they had fixed it, and was much relieved.
Then this morning, it had locked itself again. Phone had been on all night, clearly T-Mobile must have pushed another lock. Or rather: One of the TMO services/apps locked it after pulling TMOs servers. No amount of Network Resets, reboot or toggling Mobile Network settings have worked to get it back. I promised T-Mobile not to make any more attempts with the Device Unlock app as it messes things up for them, but I am sure it it would still say "Ineligible for unlock" even though the IMEI is clear in TMO's database (and listed as already unlocked).
As always, the same SIM gives perfect LTE service in my Nexus 5 and on my wife's V30, with the same APN.
I called T-Mobile Customer Care and was unable to persuade them to transfer me to Tier 2. But they did says to expect a call within a day.
It is almost certain I'll have to go the FCC complaint route. It's sad because T-Mobile is otherwise not a bad company. Probably just a small handful of idiots who got this "bright idea" how to protect TMO phones -- which ends up causing so much trouble for legitimate customers.
@jaysus145: Which Unlock service did you use? The ones I looked at which support T-mobile unlock cost $75-150 -- and they don't seem to guarantee success.

TheDannemand said:
@jaysus145: Which Unlock service did you use? The ones I looked at which support T-mobile unlock cost $75-150 -- and they don't seem to guarantee success.
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I used celllunlocker.net, it cost me $10 to unlock my AT&T version, and took less then a day to complete.

jaysus145 said:
I used celllunlocker.net, it cost me $10 to unlock my AT&T version, and took less then a day to complete.
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Thank you!
T-Mobile called me back yesterday and assured me they were still working on it and they would get this phone unlocked and please sit tight another day. They confirmed there was nothing on the phone's IMEI or my old account that should prevent it.
I'll check out unlocking services if it comes down to it.
Thanks again!

Final update on this (and solution):
T-Mobile solved the server side problem with a manager override, so that the Device Unlock app now says "Permanent Unlock approved". But it continued reporting "Unlock Failed" nevertheless. Some say because the phone is already unlocked, personally I think because the servers report the phone as previously unlocked. The app also says "Phone is currently network locked" when first running.
Notably, the connection problem persisted, and T-Mobile (after discussing with LG) said it had to be a bad SIM card or a problem with that SIM ICCID and my phone's ESN. As previously described, I get perfect connection and service using the same SIM in my Nexus 5 and in my wife's V30. T-Mobile said that was all they could do.
I then decided it was time to take the matter in my one hands. After much searching and countless Factory Resets and Network Settings Resets, I managed to get the phone working right with the following steps:
1) Remove Google account to disable Device Reset Protection.
2) Factory Reset from the Service Menu: *#546368#*932# (replace 932 with your model number, though this is likely a T-Mobile only problem). From there SVC Menu - Factory Reset (R&D Only). This takes quite a bit longer than normal Factory Reset.
3) Initial setup with WiFi, no Google account. No APN. Phone shows usual connection slowness.
4) Airplane mode, then WiFi on.
5) T-Mobile Device Unlock app, Permanent Unlock. Got the same "Unlock Failed, but Approved" message.
6) Enter APN.
7) Network Settings Reset (Android Settings - Reset menu). Wait for reset to complete. It may go straight to LTE already here.
8) Power off/on.
After this, everything is back to normal. Instant signal and LTE connection, even after subsequent Factory Reset. It's such a relief :laugh:
Edit: I should add that it is quite possible that not all of these steps are required. Probably the Service Menu Factory Reset was the key to undo what LG had done during the repair. I am merely listing all the steps which I used, and which brought my phone back to life.

How are Consumer Cellular Note 10 Carrier Locked? Help Needed

I have a Note 10 Plus N975U1 that was sold as a Consumer Cellular device through Target. The phone came with the N975U1 unlocked ROM installed on the phone and there is no carrier apps or Consumer Cellular identification anywhere. The only reason I know it's Consumer Cellular is because of a message that popped up for something, can't recall what now.
Anyway, the phone acts just like an unlocked model. Put in various sim cards and the phone reboots through the blue recovery screen to update carrier software for the sim you are using. APN settings are available and can be edited. Everything is just like an unlocked model.
Except, it connects to the network for a couple minutes or so and then stops working. It acts like the Verizon versions do before they are unlocked by Verizon. Except the Verizon versions give you a little pop up stating the phone can't be used on another network. This model has no message.
I am guessing that they are locked using the same mechanism that Verizon uses for locking their devices now except they just are not showing anything to let you know.
Is anybody aware of exactly how this is done and any third party who can unlock it? I have tried a couple different unlocked ROM s as well as an AT&T and Verizon just to see what happens. Same problem.
Thanks

Have a link from the target site to the phone you bought?
I have a feeling that the phone is not actually unlocked or it may not be as what it appears exactly. You can run the IMEI number using swappa and see if the phone is indeed an U1 variant or just the normal carrier N975U.
It maybe possible (not sure how exactly) that your using an international variant that was flashed and configured to look like a N975U1. For example the phone listed here is an international variant that is compatible with US LTE, but I have some serious doubts with how compatible it really is. From past experiences with a local store that sells unlocked Note 10+ units for Net10, I discovered they are not actually US models and are really international models. They were flashed and configured in a weird way (best I can describe it) that it would work for the most part, work with Net10, but it would not work with the other providers here locally. It would at first appear to work but then fail all together.. It wasn't until I started digging into the IMEI number and what it belonged too that I discovered the truth of what the model actually is, and I then promptly returned the phone to the store I bought it from.
If the phone is just network locked and a genuine N975U1 model it would just seem that you only have to use the phone with the service for a certain period of time before they will unlock it. Consumer Cellular would be the best place to go to get (and ask about getting) the phone unlocked.
https://www.consumercellular.com/Help/phones-and-services/5

I resell used phones and specifically phones from Consumer Cellular. All the previous Samsung models used to come unlocked, but about the time the S10 was released, all their Samsung phones came with this unusual lock. I've tried working with countless unlockers and no one has been able to remove it. Once it connects to the internet, it downloads some google update and the phone loses voice/data service. I've wondered how they do this too. A few other models I have that have the same lock are the A10e A20 J7 S10/+ S20/+ Note 10/+. Really really frustrating as I've been searching for a long time now. If anyone knows anything, please let me know. I have hundreds of these that need to be unlocked. Also to clarify, yes they are all the U1 factory unlocked models.

Edit: Apparently when a carrier locked device is flashed to U1 firmware BEFORE unlocking, there is no software prompt to unlock the device. It probably was a carrier locked N975U originally. Maybe on Consumer Cellular firmware, there would be a prompt to unlock it?

These are the guys but they only do commercial work. I am pretty sure they never fail unlock.
https://www.swiftunlocks.us/

Guyinlaca said:
Edit: Apparently when a carrier locked device is flashed to U1 firmware BEFORE unlocking, there is no software prompt to unlock the device. It probably was a carrier locked N975U originally. Maybe on Consumer Cellular firmware, there would be a prompt to unlock it?
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These are not the U versions. I've sold CC phones for years and they are and have always been U1 models. Not only does it say it in the software, but even on the back glass. They are locking these things with an update somehow.
I'll reach out to swiftunlocks, but I would put a big bet up that they can't unlock it either. I'm connected with some of the top unlockers in the world as this is my business and no one has any idea. If anyone is reading this and wants a phone to test, I'll even send you one if you think you can unlock it. It's worth a lot of money to me to find a solution. The worst part is that these phones are all paid off and eligible to unlock through the carrier, but since "I'm not the original owner" they won't help me.

Shatter65 said:
These are not the U versions. I've sold CC phones for years and they are and have always been U1 models. Not only does it say it in the software, but even on the back glass. They are locking these things with an update somehow.
I'll reach out to swiftunlocks, but I would put a big bet up that they can't unlock it either. I'm connected with some of the top unlockers in the world as this is my business and no one has any idea. If anyone is reading this and wants a phone to test, I'll even send you one if you think you can unlock it. It's worth a lot of money to me to find a solution. The worst part is that these phones are all paid off and eligible to unlock through the carrier, but since "I'm not the original owner" they won't help me.
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My friend, did you finally find a solution to unlock samsung phones locked to consumer cellular, i have a few phones locked to them and i would like to know if theres a way to unlock them

seth81 said:
My friend, did you finally find a solution to unlock samsung phones locked to consumer cellular, i have a few phones locked to them and i would like to know if theres a way to unlock them
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I personally use samkey.org