Oops, that's how I meant it, edited to make it a bit clearer
Oops, that's how I meant it, edited to make it a bit clearer
In order to get OTA csc and product code need to match...I think I said that right..lol have said it so many times I'm confused. You will not see oem unlock on US Snapdragon because the bootloader is locked.WOW - so much great information here - THANK YOU to all who have collaborated and improved our community knowledge!
I do not want to be one who asks a question that has been answered previously. So, after about an hour of reading XDA posts, forgive me if I have overlooked this...but here is my situation (closely linked to this topic):
I have just purchased a SM-N986U from T-Mobile. After booting and initial setup, I received a message that Android 11 would be automatically installed within minutes. Due to ongoing issues with Scoped Storage, which Google has indicated will not be resolved until January, I want to avoid Android 11 until these issues have been resolved. So, for now I have a new Note20 Ultra 5G that sits powered off, unused.
I had considered flashing a non-TMO CSC in order to avoid OTA updates (re-flashing the TMO CSC once these Android 11 issues have been resolved). However, I am concerned that I will not have the proper 5G bands for TMO if I flash a non-TMO CSC. I supposed I could flash a U1 AP with a U (TMO) CSC. But, if I do that, once I finally want OTA, I would need to flash the U version of AP...at which time I would not want to lose my settings or data. While I understand I could flash HOME-CSC and avoid flashing USERDATA when I would re-fIash to the U version AP, i am concerned with doing a dirty flash at that time.
Hopefully I've not been too confusing in my explanation of the dilemma. Hopefully one of you generous XDA members will explain that disabling OTA for TMO (and restoring it later) is not a dilemma at all... and point me in the right direction.
Also, unsure if this is an issue: Currently I do not have the "OEM Unlock" option in the Developer Options of my N986U. According to Odin, I did successfully flash the USC variant of the stock ROM to my N986U. However, after doing so, this phone now indicates an attempt was made to flash an unauthorized ROM, so I must identify myself to T-Mobile. I assume (hope) this will be a non-issue as well.
If you are just looking for clean install just flash the unlocked firmware you are currently on. If your not concerned about saving data just factory wipe. But to me a clean install means just that, so when I clean install I flash AP..BL..CP..CSC and not HOME_CSC that keeps dataHey guys, I have a Note 20 Ultra 5G Unlocked which I purchased directly from Samsung US, if I wanna do a fresh install using Odin and still get OTA updates, which firmware do I use? I'm using T-Mobile sim btw
View attachment 5170273
so just to be clear I will use N986U1UEU1CTL4 in the first Page and load AP, BL, CP and CSC, correct?If you are just looking for clean install just flash the unlocked firmware you are currently on. If your not concerned about saving data just factory wipe. But to me a clean install means just that, so when I clean install I flash AP..BL..CP..CSC and not HOME_CSC that keeps data
Yes....flashing csc will wipe device. If you flash home_csc it keeps dataso just to be clear I will use N986U1UEU1CTL4 in the first Page and load AP, BL, CP and CSC, correct?
Thank you @butchieboy. In order to cause the OTA and CSC product codes to not match, would you recommend flashing the U1 version of AP, BL, CSC, and the U version of CP and USERDATA (versus the opposite combination of U and U1 files) in order to ensure the correct radio bands are retained for TMO 5G? I have no issue with losing the obnoxious TMO startup tone and magenta screen. However, I would like to keep the correct TMO radio bands, Visual Voicemail, VoLTE calling, etc.In order to get OTA csc and product code need to match...I think I said that right..lol have said it so many times I'm confused. You will not see oem unlock on US Snapdragon because the bootloader is locked.
I'm 986U. So I'm not sure about U1. But if I flash U1 on my At&t locked device, I lose advanced settings such as wifi calling and the software update toggle is gone. Hopefully someone with U1 can better answer this. This thread is a wealth of knowledge.Thank you @butchieboy. In order to cause the OTA and CSC product codes to not match, would you recommend flashing the U1 version of AP, BL, CSC, and the U version of CP and USERDATA (versus the opposite combination of U and U1 files) in order to ensure the correct radio bands are retained for TMO 5G? I have no issue with losing the obnoxious TMO startup tone and magenta screen. However, I would like to keep the correct TMO radio bands, Visual Voicemail, VoLTE calling, etc.
Yes....flashing csc will wipe device. If you flash home_csc it keeps data
Yes you can flash. As long as bootloader is the same you can. Going back is the same way. All of this has been answered numerous timesThis might be a noob question but can I flash my US unlocked Note 20 Ultra that has the firmware "N986U1UEU1CTL4" with T-Mobile Rom "N986USQU1CTL2"??? what is the side effect of doing so since I'm already using T-Mobile Sim? the reason im asking is I don't have Native RCS in the Samsung Messages App and I read that those of us with unlocked Note 20 Ultra can get around this by flashing T-Mobile rom.
Can I get back to unlocked Samsung ROM if things don't work out?
and the whole process is the same going back and forth between roms? just use Odin right?
I'm 986U. So I'm not sure about U1. But if I flash U1 on my At&t locked device, I lose advanced settings such as wifi calling and the software update toggle is gone. Hopefully someone with U1 can better answer this. This thread is a wealth of knowledge.
Yes this is true. My att device is currently U1. But I'm on one ui 3.0 beta 4. And I have wifi calling. One u.i 3.0 adds wifi calling. Everything is working as intended.
The only thing I can't get to work is RCS with the work around. Sometimes my messages won't send
Not for T-Mobile it won't.Yes....flashing csc will wipe device. If you flash home_csc it keeps data
What model is the phone?Hey, fellas, I install the N986U1UEU1CTL4, turns it on and it unlocks, I insert the Tmobile, and I could make phone calls and it says Tmobile but after 10mnts comes back to the error Change carrier device cant be activated on another carrier....any ideas, please...I install BL, AP, CP, CSC not user data...its that could b the issue..