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[Q] S3 -GT-I9300 International version verification

Can some one help and tell me how I can find out where my Galaxy S3 gt-i9300 was manufactured and possibly what market the phone was meant to be used in. There are many of us on this forum that have had the sudden death issue and the first thing we are told is if your in the US we cant fix it but send it to the samsung service Center in the country you bought the phone in. HMMM easier said then done therefore the question is there a way to identify where the phone was originally meant to be used international,
I have seen a website that had a tool that you would add your serial number andEMEI number and it would tell you where the phone was from and carrier used etc but have not been able to find it again. Yah should learn to bookmark things ....

[Completed] T-Mobile Blocked my IMEI on used phone

Hi Im new here and needed some clarification regarding an issue with my IMEI on my T mobile Note 2. I bought it used back in June off of a facebook buy and sell group to fix it up and sell it. At the time I bought it, it had a clean IMEI, and the people who sold me the phone told me they were the original owners. a few weeks ago, I again checked the imei, and it was still clean.
Now Im about to sell the phone, but I check one more time and now its blacklisted on T mobile and Metro, but clean on ATT and Verizon according ti imeidata.net. I check tmobiles website and it says its been reported lost. Im going to try to contact the people who sold it to me, and if they wont help me, Ill be contacting Tmobile and Asurion. After doing some research about what else I can do, Ive came up with a few options, but I still need some advice.
1. Sell as is and cut my losses
2. Sell on ebay to someone outside of US
3. Sell for parts
If I sell it to someone outside the country, how do I know it will work wherever the buyer is? I have no intention if screwing anyone over and want to make sure they get what they pay for.
How can I protect myself from this happening in the future? Is there a way to get the IMEI numbers of future phones signed over to my name, even if Im not a customer of that phones carrier?
Also, if imeidata.net says its only blacklisted on Tmobile/metro, can it be used on other American networks?
I really appreciate any help with this. Thanks.

One more thing I forgot to mention...when I bought it, it was running android 4.1.2. I downgraded it to 4.1.1 to unlock it and its still running 4.1.1 incase the unlock procedure didnt work and I need to try again. Not sure if this is relevant to the imei issue but Im just putting it out there.

Hi,
If it's blocked, it's blocked. No one can help you with that legally. Sorry.
Whether it works in other carriers.... I would doubt it. Usually blacklists are across all carriers in North America.
And as far as protecting yourself in the future, you can't really. Buying a used phone is always going to be a gamble. Nothing you can do about that except try to buy from a reputable source or individual.
Good luck!
Thread closed.

Could This Be a Fake S8?

I bought an S8+ 955FD which seems to be genuine but when I contacted AT&T to get assistance with slow LTE speeds (I contacted them 2 months ago for the same reason when I was using an AT&T branded phone). Of course they ask for the IMEI to verify whether it's an LTE phone and is supported. When I gave them the IMEI they said it wasn't even coming up as a Samsung phone let alone LTE. It's listed as an unknown phone with 2G capabilities. I checked the IMEI on http://www.imei.info/ and it shows that it's a S8+ and everything checks out on that site as it does on my Samsung box.
My sister has an S8 too 955F and when AT&T checks hers, it comes up as a Samsung S8+.
I don't know if my having rooted the phone has anything to do with it (I'm guessing not because rooting doesn't change the IMEI) but could this be a fake? Should I return it?

icydius said:
I bought an S8+ 955FD which seems to be genuine but when I contacted AT&T to get assistance with slow LTE speeds (I contacted them 2 months ago for the same reason when I was using an AT&T branded phone). Of course they ask for the IMEI to verify whether it's an LTE phone and is supported. When I gave them the IMEI they said it wasn't even coming up as a Samsung phone let alone LTE. It's listed as an unknown phone with 2G capabilities. I checked the IMEI on http://www.imei.info/ and it shows that it's a S8+ and everything checks out on that site as it does on my Samsung box.
My sister has an S8 too 955F and when AT&T checks hers, it comes up as a Samsung S8+.
I don't know if my having rooted the phone has anything to do with it (I'm guessing not because rooting doesn't change the IMEI) but could this be a fake? Should I return it?
Click to expand...
Click to collapse
Very well could be. Where did you buy it? Take a look at this thread.
https://forum.xda-developers.com/galaxy-s8+/help/s8-software-installation-problems-t3639259
If it has a mediatek processor and not a snapdragon or exynos it's definitely a fake.

AT&T does not have anything in their databases about international phones like the F model. When you call them and give them an IMEI of an S8 F model, they will not know anything about it, and their systems won't know what features it is capable of supporting. Ton get Volte working, you will have to flash the ATT CSC https://forum.xda-developers.com/galaxy-s8/samsung-galaxy-s8--s8-cross-device-development/utility-flashable-csc-selection-v1-1-0-t3636739 and keep calling them until you get a 2nd level tech support guy that is willing to go into the guts of their systems and place an IMEI of another ATT phone that has similar features. If you have another similar phone on your ATT account, they can use that IEMI to have their system figure out what features it supports. I believe they used a S7 that I used to have and that got Volte working - for a while anyway.

I have an unlocked S8+ phone Model G955U1 and was with AT&T. In the process of trying to get wifi calling (BTW, they don't provide this feature for unlocked phones, so I dumped them and went with T-Mobile), I asked them to verify the IMEI, they could not find it. Their IMEI data base lists only the phones they sell but not the factory unlocked ones or phones you buy somewhere else. I wouldn't count on AT&T and as ggrant3876 mentioned above, check your processor's make.

Flame Red said:
AT&T does not have anything in their databases about international phones like the F model. When you call them and give them an IMEI of an S8 F model, they will not know anything about it, and their systems won't know what features it is capable of supporting. Ton get Volte working, you will have to flash the ATT CSC https://forum.xda-developers.com/galaxy-s8/samsung-galaxy-s8--s8-cross-device-development/utility-flashable-csc-selection-v1-1-0-t3636739 and keep calling them until you get a 2nd level tech support guy that is willing to go into the guts of their systems and place an IMEI of another ATT phone that has similar features. If you have another similar phone on your ATT account, they can use that IEMI to have their system figure out what features it supports. I believe they used a S7 that I used to have and that got Volte working - for a while anyway.
Click to expand...
Click to collapse
Thanks for replying. Funny, I never got notifications that anyone had replied.
Actually someone did add an IMEI for another similar AT&T phone.
Nothing about the phone seems fake, but when I gave them my sister's IMEI for a 955F they said it immediately came up in their system while my 955FD did not.
I'll review that thread to see if my phone would be negatively affected by the ATT CSC.
BTW, what happened to your voLTE that made it stop working?
Gratitudes!!

ggrant3876 said:
Very well could be. Where did you buy it? Take a look at this thread.
https://forum.xda-developers.com/galaxy-s8+/help/s8-software-installation-problems-t3639259
If it has a mediatek processor and not a snapdragon or exynos it's definitely a fake.
Click to expand...
Click to collapse
None of these are applicable *whew*
The seed of doubt was planted when an AT&T rep told me it may be a fake even though I had not previously considered it.
Thanks for the link!!

TheBoozer said:
I have an unlocked S8+ phone Model G955U1 and was with AT&T. In the process of trying to get wifi calling (BTW, they don't provide this feature for unlocked phones, so I dumped them and went with T-Mobile), I asked them to verify the IMEI, they could not find it. Their IMEI data base lists only the phones they sell but not the factory unlocked ones or phones you buy somewhere else. I wouldn't count on AT&T and as ggrant3876 mentioned above, check your processor's make.
Click to expand...
Click to collapse
I feel better now, thanks! It shows Exynos 8895 and everything else seemed legit as well. I don't know why I listen to AT&T reps....
I never really liked the Wi-fi calling on my AT&T V20 and even without it, the voice clarity is wonderful.

one way to check is root , real us versions cant be rooted as its a snapdragon , so far our friends in china cant fake an s8 , just by looking at the screen will give it away , but before the years out iam sure they will have a better clone that could fool anyone.international models are always better also faster than the us versions as nd no crap ware from the carriers .

That lack of band 30 could be the issue regarding the slow LTE speeds

icydius said:
I bought an S8+ 955FD which seems to be genuine but when I contacted AT&T to get assistance with slow LTE speeds (I contacted them 2 months ago for the same reason when I was using an AT&T branded phone). Of course they ask for the IMEI to verify whether it's an LTE phone and is supported. When I gave them the IMEI they said it wasn't even coming up as a Samsung phone let alone LTE. It's listed as an unknown phone with 2G capabilities. I checked the IMEI on http://www.imei.info/ and it shows that it's a S8+ and everything checks out on that site as it does on my Samsung box.
My sister has an S8 too 955F and when AT&T checks hers, it comes up as a Samsung S8+.
I don't know if my having rooted the phone has anything to do with it (I'm guessing not because rooting doesn't change the IMEI) but could this be a fake? Should I return it?
Click to expand...
Click to collapse
not a fake dont worry and no rooting will have nothing to do with it, also you would easily be able to tell if you compared it to your sisters s8! the current s8+ fakes are the same size as the S8 theres nothing + about them haha, they may fool someone who has never handled an s8 or seen one irl but you would 100 percent be able to tell its a fake having handled a real one regardless if its the plus or not

Very easier to know is real or not, if Odin can't detect then it is fake. Fake one impossible can install Samsung own firmware.

I know my s8+ is a fake. I just need to know how to change imei number so I can use my phone. It came from China. He said it's supported by TMobile and at&t. I want to go with TMobile if possible. He sent me the pattern to call and change it,but I don't know what numbers to replace it with.

Cecejohns said:
I know my s8+ is a fake. I just need to know how to change imei number so I can use my phone. It came from China. He said it's supported by TMobile and at&t. I want to go with TMobile if possible. He sent me the pattern to call and change it,but I don't know what numbers to replace it with.
Click to expand...
Click to collapse
Changing imei numbers is illeagal in most contries. and You will find no help on XDA for such tasks
either way orig user solved his problem thread closed

Can I root my Samsung S7 and gert rid of "all things ATT"..?

So, I'll apologize if this has already been dealt with previously, but I just need to verify what I've been told by a friend who knows Android systems (and Samsung S7 phones) a LOT more than I will ever attempt to understand..
About a year ago, I bought a Samsung Galaxy S7 from a 'rebuilder' (my term) who mentioned at the time "... it was ATT phone..", and, yes, when I turn it on it does the ATT circle jerk logo and has an ATT logo on the back of the phone. This was of no real concern to me, because my service purveyor uses the ATT system (Consumer Cellular), so it's worked well enough. But unfortunately, it also has a boatload of 'semi-proprietary' ATT trash in the phone which I'd like to get rid of. To confuse the matter even more, it appears that I cannot 'unlock' the phone because it has not been associated with an actual active ATT account for close to two years, and it APPEARS that now they refuse to accommodate an unlock code for this phone.
So... according to my friend (Mr. Android Phone), I can 'root' this phone to 'factory original firmware' and make it (in essence) just a plain-old-vanilla Samsung S7 without this rather bogus ATT firmware and the myriad of craplets I'd like to get rid of..
So, I'm here looking for "expertise" in such things because I certainly don't want to 'brick' this pretty nice phone, but I also want to get this to a point where there is no association with ATT in any manner. So my question sorta comes down to: "can I root this and be rid of all things ATT?", and "will this allow me to achieve an 'unlock' without having to play ATT's games? (I had QUITE the discussion with an ATT 'support' dude a couple of hours ago when he flatly refused to give me an unlock code so I could simply ATTEMPT to see if Consumer Cellular's T-Mobile service might work better at my home, since CC tells me I'm right in the center of a brand new rebuilt 4G service area).
Does any of this make any sense to anyone? Pardon my ignorance, but if the IMEI # is somehow 'tethered' to ATT and they won't "release" it, how does rooting help with this? - or is this something more like an 'association' of the IMEI # AND the ATT firmware...? GAH!! I'd just like to be totally rid of all this ATT junk and have the freedom to choose whichever service I want.

CentennialMan said:
So, I'll apologize if this has already been dealt with previously, but I just need to verify what I've been told by a friend who knows Android systems (and Samsung S7 phones) a LOT more than I will ever attempt to understand..
I'd just like to be totally rid of all this ATT junk and have the freedom to choose whichever service I want.
Click to expand...
Click to collapse
Hi There that's a lot of words partner! I'll try make the answer easy to understand and I've cut out much of the post so my reply isn't huge.
1. Yes you can install vanilla firmware which will remove all branding from AT&T and you don't need to root the phone to do this. here is the firmware for your device >>here<< You can also use XAS or XAA. You will see the guide and the Odin you need to flash this firmware.
2. This is another version of Odin on this website if you have any issues with the one on Sammobile. >>here<<
3. Unfortunately you cannot unlock the phone unless the original cell phone provider gives you their half of the unlock key as a code to input to the phone. In the UK once a phone is out of the initial contract period it is illegal for the provider to refuse to give you this code whether your still with them or not. I know in the USA you guys gets ****ed over. The original account holder of the phone can ask for the unlock code but not you.
4. Changing the firmware and unlocking the phone to any network are two different things, flashing unbranded firmware will not unlock the phone the network is tied to. They don't make it that easy!
5. As far as i know T Mobile (USA) has also moved to G930U firmware so you could be lucky with a T Mobile SIM working once the phone is flashed with this firmware but don't hold your breath. Check Sammobile for the T Mobile firmware too.
6. IMEI number is tied to the phone so in theory it can be changed after the phone is rooted and you are able to modify the EFS partition but it is extremely difficult even for veterans like me and it causes lots of problems with cell network registration. Leave well alone if you don't want a completely useless device.
Things to make flashing go easier
1. Turn off FRP lock or sign out of the Google account on the phone or delete it before you do anything, you can put that account back on the phone after flashing.
2. If you enable Developer options make sure " usb debugging" is enabled and OEM unlock, not essential but can help when things go wrong.
3. Anything you want to keep, pics media etc back up or move to SD card, the SD card won't be touched when flashing firmware.
4. Please follow the guides on how to flash correctly.
Any other questions please ask.

It should be noted that if it's an ATT phone it's Snapdragon therefore permanently bootloader locked, OEM Unlock won't actually do anything, that setting only works on Exynos.
The only root method for Snapdragon is to use a leaked engineering bootloader to gain system access, and you can only install the leaked bootloader if your phone is already running old firmware. For up to date phones there is no root method.

Beanvee7 said:
It should be noted that if it's an ATT phone it's Snapdragon therefore permanently bootloader locked, OEM Unlock won't actually do anything, that setting only works on Exynos.
The only root method for Snapdragon is to use a leaked engineering bootloader to gain system access, and you can only install the leaked bootloader if your phone is already running old firmware. For up to date phones there is no root method.
Click to expand...
Click to collapse
Hello mate i'm not sure if your aware but AT&T were initially Qual comm but they've also been using Exynos for a while.

cooltt said:
Hello mate i'm not sure if your aware but AT&T were initially Qual comm but they've also been using Exynos for a while.
Click to expand...
Click to collapse
Source?

Beanvee7 said:
Source?
Click to expand...
Click to collapse
Don't be smart you know how to use Google?

I did google it, I wouldn't have asked for a source if I found something. But it doesn't matter, you're the one making unsubstantiated claims, the burden is on you to prove it. But since you asked for it:
AT&T's website says Snapdragon
https://i.imgur.com/TdV62Mq.jpg
https://www.att.com/buy/phones/samsung-galaxy-s7-32gb-black-onyx.html
GSM Arena says Snapdragon
https://www.gsmarena.com/samsung_galaxy_s7_(usa)-7960.php
Wikipedia says Snapdragon
https://en.wikipedia.org/wiki/Samsung_Galaxy_S7#Qualcomm_Snapdragon_820_Models
There isn't a single page when googling AT&T S7 Exynos that backs your claim up. The USA also uses completely different network technology than internationally, using the S7 Exynos in the USA is already known to cause issues with LTE, VoWiFi etc. They'd have to do a hardware refresh of the Exynos SoC if they wanted to support it in the USA, which they ain't going to do a for a 3 gen old phone.

Beanvee7 said:
I did google it, I wouldn't have asked for a source if I found something. But it doesn't matter, you're the one making unsubstantiated claims, the burden is on you to prove it. But since you asked for it:
AT&T's website says Snapdragon
https://i.imgur.com/TdV62Mq.jpg
https://www.att.com/buy/phones/samsung-galaxy-s7-32gb-black-onyx.html
GSM Arena says Snapdragon
https://www.gsmarena.com/samsung_galaxy_s7_(usa)-7960.php
Wikipedia says Snapdragon
https://en.wikipedia.org/wiki/Samsung_Galaxy_S7#Qualcomm_Snapdragon_820_Models
There isn't a single page when googling AT&T S7 Exynos that backs your claim up. The USA also uses completely different network technology than internationally, using the S7 Exynos in the USA is already known to cause issues with LTE, VoWiFi etc. They'd have to do a hardware refresh of the Exynos SoC if they wanted to support it in the USA, which they ain't going to do a for a 3 gen old phone.
Click to expand...
Click to collapse
lol ok.

Help, Tmobile carrier lock, "invalid imei"

Hello,.
I bought a phone, 8t plus (tmobile version). when i try to check imei status it says invalid imei... it came with a deactivated sim card.
i tried paying three different unlock site services for the t-mobile unlock app. but they keep returning to me saying that they could not find the imei or its invalid.
I'm in a real pinch here, I love this phone, what are my options? is there some way to force unlock it with a different firmware or something like this? maybe you've got a clue why my imei doesn't show up anywhere?
many thanks

If it's bought from eBay, you're SOL - invalid IMEI is invalid IMEI. You will want to refund it and buy the virgin OnePlus 8T to ensure you don't run into problem.
It will be tough to remove the IMEI from the blacklist, as it's usually death sentence for that ID number, not to mention it's illegal to mess with it.
Especially for this reason, I don't buy used phone anymore unless it won't see network service (usually as a Linux hacking plaything), and I mainly buy new phones ever since to guarantee that I don't run into any problems.
Sent from my OnePlus 8T using Tapatalk

it doesnt give any error, through the tmobile unlock app it says "not eligible" which all unlock sites say that's what you want to get..
THEY say that they cant find the imei anywhere and that maybe I gave them invalid imei, but I'm sure I did not... this happened with more than 1 service site. any clues? i don't want to return it unless absolutely neccessary

Alright, double check your IMEI to ensure you don't make any mistake. There are three ways to check the IMEI, of course; 1. dial *#06#, browse into Settings, and go through "About phone", and 2. touch "Network Status" if the IMEI is not shown or 3. reboot your phone into Fastboot and scroll the UEFI Fastboot bootloader option down to "Show barcodes". It's easy to make mistakes with long numbers like IMEI - had to triple check mine before submitting the application for the bootloader unlock token.
Sent from my OnePlus 8T using Tapatalk

I checked, the imei i gave them was the correct one, I wish that was the problem. how can an imei be invalid (not blocked/blacklisted)?isn't there any way to flash something on the phone to sim ulock it? thanks

even services that CHECK if its blacklisted doesnt work with phones IMEI. what is going on here?! thanks

This phone is not blocked—it’s ready to use on the T-Mobile network.
Device Name Not Available
IMEI: *****************
that's what the unlock service site sent me, they said that is the reply they received..

Alright, if you have Straight Talk or maybe a T-Mobile SIM, test it to make sure it's alive.
Sent from my OnePlus 8T using Tapatalk

You have to have it so long before T-Mo will unlock the device.

Three days minimum if I recall. I had mine unlocked in a week after the purchase, and only have unlocked its UEFI bootloader a few days ago once the LineageOS 18 ROM matured just enough for my liking. Otherwise it's a 40 days wait.
Sent from my OnePlus 8T using Tapatalk

Proneous said:
Hello,.
I bought a phone, 8t plus (tmobile version). when i try to check imei status it says invalid imei... it came with a deactivated sim card.
i tried paying three different unlock site services for the t-mobile unlock app. but they keep returning to me saying that they could not find the imei or its invalid.
I'm in a real pinch here, I love this phone, what are my options? is there some way to force unlock it with a different firmware or something like this? maybe you've got a clue why my imei doesn't show up anywhere?
many thanks
Click to expand...
Click to collapse
Hey there!
can you PM me a screen shot of your IMEI, please? I really want to look in this. I have a oneplus 8t. Thanks.

​I am outside of the usa at the moment so the T-Mobile SIM card that came with the phone is unable to activate... I'm starting to wonder if that's the only problem
I have found a rather expensive service provider that has full confidence that he can unlock my phone. Will update you further when I have more details.
Is it safe giving my imei to other forum members? can it be used for malicious activity?
Many thanks.

Alrighty, keep us posted.
Sent from my OnePlus 8T using Tapatalk

try this https://www.oneplus.com/unlock_token
---------- Post added at 10:30 AM ---------- Previous post was at 10:30 AM ----------
Why did you buy a t-mobile phone if you're outside of the usa?

Proneous said:
This phone is not blocked—it’s ready to use on the T-Mobile network.
Device Name Not Available
IMEI: *****************
that's what the unlock service site sent me, they said that is the reply they received..
Click to expand...
Click to collapse
Then use it on TMobile for minimum 3days then unlock it via tforce on facebook or twitter T-Mobile help. But this requires you to have TMobile service. That's the only way you will unlock that phone those unlocking site aren't connected to get the 8t from T-Mobile unlocked that's mainly for samsung devices trust me I run a repair shop and use the unlocking sites. If you can't get TMobile service then you best bet is to return the device if you can't return your SOL until a simunlock bypass come

I'm not from the USA . Anyone got suggestion how to get it activated ? Thanks

Hey friends!
i've promised to update as it unfolds, day before I was supposed to return phone I got it unlocked by a vendor claiming he is working with T-Mobile directly or something like this, and said he can do it although not cheaply.
That guy had a handful of troubles to deal with me as I put him on a timeline, and not only that, bombarded him with conflicting messages before I decided to actually use his service. he was extremely polite and understanding.
may I recommend an ebay vendor here? if yes I will put a link to his store.
thanks!

Proneous said:
Hey friends!
i've promised to update as it unfolds, day before I was supposed to return phone I got it unlocked by a vendor claiming he is working with T-Mobile directly or something like this, and said he can do it although not cheaply.
That guy had a handful of troubles to deal with me as I put him on a timeline, and not only that, bombarded him with conflicting messages before I decided to actually use his service. he was extremely polite and understanding.
may I recommend an ebay vendor here? if yes I will put a link to his store.
thanks!
Click to expand...
Click to collapse
Sounds like you purposely bought a phone that was either lost or stolen in the US and was sold to an overseas buyer because the blacklist on devices from US and Canadian carriers does not extend outside of the US and Canada.

jcsww said:
Sounds like you purposely bought a phone that was either lost or stolen in the US and was sold to an overseas buyer because the blacklist on devices from US and Canadian carriers does not extend outside of the US and Canada.
Click to expand...
Click to collapse
Sounds like you're trying to be holier than thou.
I bought it unbeknownst whether it's blacklisted or not. It was brand new and price was great. Where's the problem? Why should I care where it comes from if it works?

Proneous said:
Sounds like you're trying to be holier than thou.
I bought it unbeknownst whether it's blacklisted or not. It was brand new and price was great. Where's the problem? Why should I care where it comes from if it works?
Click to expand...
Click to collapse
It is more of a buyer beware statement about buying cheap devices from other countries.