Help flashing s9 plus to unlocked firmware - Samsung Galaxy S9+ Questions & Answers

Hey everyone, first post here so please take it easy .. I've read a few older posts but having trouble knowing I have the most correct updated files.
I'm generally not the worst with techy stuff but I'm needing some basic walk through to flash my phone to the unlocked version of someone can help me out.
I have a US cellular branded s9+. I recently transferred it over to total wireless.. And it seems I've gotten most things working for the most part. However, I lose Data when making phone calls. So even though my volte setting is turned on it appears it's glitchkng up... I'm assuming because it's the uscc firmware. Based in what I've read on reddit it seems flashing to u1 is the best bet to fix issues like this.
I've read some threads and I'm not really sure which version of Odin I need and which firmware is correct.. If anyone can help this rookie out I'd be greatly appreciative.. And maybe confirm flashing is the correct way to go about this??
Thanks in advance!

All u need to do is flash to TMobile and your all good to go. I was using a sprint variant of it and I would also lose data.
Flashed it and now I have all the perks Wifi Calling / VoLte
Here is a little tut I posted a few weeks ago
https://forum.xda-developers.com/showpost.php?p=82294289&postcount=2

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[Q] Help needed

Hello i am hoping that someone will be able to help me. I tried rooting my phone and when it booted up i don't have a network. Now i can't' call/text/checkemail.
I tried resetting to factory settings and that didn't work. how do i remove the root so its back to stock?
Thank you!
Rooting phone has nothing to do with the network you did something wrong .
Remove root by flashing full stock firmware matched as close as possible to your original firmware .
INSTRUCTIONS
Stock Roms .and csc
http://forum.xda-developers.com/showthread.php?t=1075278
thanks for the quick response. how do i go about finding which on is closes to my origonal firmware? sorry for the ignorance?
you should have checked your firmware version first before rooting
well crap. does this mean i am out of luck and need to make an insurance claim as being lost? my issue is its with Sprint and the phone just came out last friday so there isn't much information on the web on it
kcclonse said:
well crap. does this mean i am out of luck and need to make an insurance claim as being lost? my issue is its with Sprint and the phone just came out last friday so there isn't much information on the web on it
Click to expand...
Click to collapse
I replies as per Samsung Galaxy SGS2 i9100 model and know nothing about a Sprint phone .
It would make sense to either look for a Sprint thread here or if Sprint is in the stock rom links i gave download the latest .
If it worked before root the strong probability is that you made a mistake its usually recoverable though but no idea how you rooted .
jje

[Q] Big Problem After RootingSGS2 ..No Service

EDIT ** FIXED IT*** I had flashed the wrong kernel in my phone. found the right one, now Im cool.
Thanks anyway
Hi
heres the deal... Tried to root the SGS2, never did a backup, Used an Unsecured Kernel from a list on here, picked at random. I think I picked the wrong Kernel for my phone. It must have gotten Rooted, I see the yellow triangle, But I do not have any phone service anymore. Before someone finds me hanging in the shower... is there any help that can be offered to me?
Thanks,
BC
Have you tried to flash back to the stock kernel? You can probably find yours here: http://forum.xda-developers.com/showthread.php?t=1113928
What kernel did you use?. Try installing the stock kernel whit odin, and then install the kernel cfroot, that way you will be as root, make a nandroid backup and flash what you want.
I USED KERNEL 2.6.35.7-I9100BOKE3-CL186387
Where can I find the stock kernel? Please bare with me, real new to this .
read this, you will be a big help, plus there are the download links.
http://forum.xda-developers.com/showthread.php?t=1075278
Ive read the link you provided. I cant seem to find the correct firmware/ kernel to download. The phone is Android version 2.3.4. Im in North America, california to be more specific. . Am I supposed to be looking for a code that starts with UG for north America? Still lost
did u check ur imei no , if it matches the one on ur box , its fine if its not then ur efs is corrupted.as u told all fine no signal,it happens wen ur phone dosnt reg to ur network due to imei change........
trekrfc said:
Ive read the link you provided. I cant seem to find the correct firmware/ kernel to download. The phone is Android version 2.3.4. Im in North America, california to be more specific. . Am I supposed to be looking for a code that starts with UG for north America? Still lost
Click to expand...
Click to collapse
Did you buy your phone from AT&T or T mobile? If yes you are in the wrong forum and using the kernel from a different model. Your phone isn't I9100, keep scroll down on the main page to the carrier specific subforum.
sg s2 rooting flashing for noobs
just got this phone yesterday how to do this in rooting for dumms mode would b nice. been reading for 12 hrs plus still lost....
benndick23 said:
just got this phone yesterday how to do this in rooting for dumms mode would b nice. been reading for 12 hrs plus still lost....
Click to expand...
Click to collapse
First thing First.
make sure you know what version of the phone you have.
I would go to settings> about phone and write down all the info there. This way you can figure out what you have so you know what you need.
This sgs2 phone is actually my friends. he rooted without reading up first. I had to do a bunch of reading and find out how to fix it. which I did.
I rooted my htc evo back in march, this sgs2 is a different process, so im learning all over again. only this time i kinda hane an idea of what people are talking about.
good luck

Noob problem after root

Hi guys
Sorry but i am a noob to all this so have proberly stupid questions.
After flashing to a customer rom i went back to a stock t-mobile rom. Problem i now face is when i try to download apps from other companies that are not on the app store eg mfortune they are unable to detect the type of phone i am using so i get "sorry we do not currently support your device" despite being able to do so before rooting and flashing. Is there a way i can change this with the release of skyGo on android this month i want to be able to download it. As it will be only on the galaxy s2 and HTC phones for some time i dont really want to wait.
Any help please???
Did you do a full whipe? Adding some details like model number, the rom you flashed and the one you came from may get you some more useful results.
As for the skyGo app, it won't take more than a day for it to pop up as an APK somewhere on the net.
Hello
Thanks for the reply i am currently in work so i cant look at my phone but will update on which firmware and kernal version i am running
I did however follow this guide to root reviews.cnet.co.uk/mobile-phones/how-to-root-your-samsung-galaxy-s2-50004972/[/url]
Not sure if that helps i did not however use the guide to flash the secure kernal maybe thats where i have gone wrong.
I will update the thread with the info later.
Thanks again

[Q] Un-root help needed - how can I return to S3 stock?

Hi All,
I'm totally new to rooting and to be honest I never planned to get into it and especially not in this way.... please read on....
I bought a 2nd hand S3. The original owner told me it had been unlocked from Vodafone UK, but no further modifications.
So the phone arrives and I turn it on and the first thing I notice is UltimaROM asking to download their latest v9 ROM. I see other apps installed like SuperuserSU, Headphones shortcut for SGS3, S Note etc... so I suspect the device has indeed been modified. Seller tells me it's only been unlocked and nothing else. Also, comparing to a work colleague's stock S3, my phone has a different appearance (different battery % icon amongst others...), I see Nexus 4 wallpapers are available, JaiThemes etc... all looks a bit fishy to me.
Also phone does boot into recovery mode into CWM...
So I start reading a little bit, I've downloaded Rootchecker - says phone is not rooted.
All I ever wanted was a stock S3, no interest in rooting for now. Could someone please advise what I can do to get back to stock and have it unlocked? I know there are guides to un-root a phone, but rootchecker says my phone is not rooted, and I have no original backup, so I don't know where to go from here....
Any help or guidance is appreciated here...
Check the basics, there's a guide on flashing a stock ROM.
The seller is definitely lying to you
Glebun said:
Check the basics, there's a guide on flashing a stock ROM.
The seller is definitely lying to you
Click to expand...
Click to collapse
Thanks for the reply.
If I find a Vodafone UK stock ROM, will I then lock the phone back to Vodafone?
Thanks
Don't think so, but why would you get a vodafone ROM? Just get a universal one
Glebun said:
Don't think so, but why would you get a vodafone ROM? Just get a universal one
Click to expand...
Click to collapse
Thanks for that, I will look for a universal one.
I've been looking for a bit, but I can't find the 'basics' section you mention in order to flash a stock ROM.
I have searched the forums, and people have mentioned ' I flashed a stock ROM' but I need to know the steps to do this...
Also - has my warranty been affected? If yes and it is now invalid, will flashing a stock ROM solve this?
Again, any help is really appreciated here.
http://forum.xda-developers.com/showthread.php?t=1927113

Hi, am I the only one without Oreo update available?

Hi everyone first off I'm new so sorry if I can't find the answer or posted in wrong section. But I have t mobile note 8 n950u. 7.1.1 baseband was n950usqu3bra9 but now it's different n950usqu3ara1 n I'll explain.
Oreo update has been out since may 23 and I purchased my note 8 a few days ago from used phone shop and they switched my carrier to metro on the spot. It's not unlocked. I didn't have the update available but I know it's definitely around nowadays so I have been looking for it around the web and thru the forums trying to find a way to update. I seen a video pointing out to download an update and try it and it originally failed. I remember the update ended in crc3 if that matters and since then my baseband has changed. I believe because I'm on metro that I won't get the update regularly l like I should.
My question is does everyone else already have oreo already from t mobile? And also can someone point me to somewhere or help me find a way to get Oreo on my device please I really want the update and freaking out because I think I changed my baseband n ruined my chances of getting it.
Any help if appreciated and thank you. Ps I would need links to what files to download as I'm not good with these things and really don't wanna destroy my phone.
hows your battery life so far??

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