Here's what I got. ATT LG G3 running stock Marshmallow D85030p with what I presume is the newest security patch (June 2016)
At this point it's not on a carrier but it's locked by ATT. They kept my number as well.. A number that was mine from previous carriers.
Will I be able to root, install TWRP, and unlock this device to use on a prepaid carrier? Keep in mind this same phone has been flashed, rooted and ran recovery mods and ROMs before. Still in perfect working condition after receiving it's last stock OTA.
jlgarr86 said:
Here's what I got. ATT LG G3 running stock Marshmallow D85030p with what I presume is the newest security patch (June 2016)
At this point it's not on a carrier but it's locked by ATT. They kept my number as well.. A number that was mine from previous carriers.
Will I be able to root, install TWRP, and unlock this device to use on a prepaid carrier? Keep in mind this same phone has been flashed, rooted and ran recovery mods and ROMs before. Still in perfect working condition after receiving it's last stock OTA.
Click to expand...
Click to collapse
First of all what do you mean they kept your number? Did you cancel? Unpaid bill? That would be a deciding factor on how to go about things.
But no root cannot unlock your device
1. If you left AT&T in good standing AT&T will unlock the device for free. Even if you don't have any account.
2. If not then you can get it unlocked for a few dollars from some eBay sellers.
3. What prepaid carrier? If Any provider that runs on AT&Ts network you don't have to get it unlocked, it will work fine with Go Phone, Cricket , H2O and many others that run on AT&Ts network.
But a note if it's no longer on AT&T due to unpaid bill, or on bad terms remember the device may no longer work on any GSM carrier within the USA due to AT&T will blacklist it.
Sent from my iPhone using Tapatalk
hyelton said:
First of all what do you mean they kept your number? Did you cancel? Unpaid bill? That would be a deciding factor on how to go about things.
But no root cannot unlock your device
1. If you left AT&T in good standing AT&T will unlock the device for free. Even if you don't have any account.
2. If not then you can get it unlocked for a few dollars from some eBay sellers.
3. What prepaid carrier? If Any provider that runs on AT&Ts network you don't have to get it unlocked, it will work fine with Go Phone, Cricket , H2O and many others that run on AT&Ts network.
But a note if it's no longer on AT&T due to unpaid bill, or on bad terms remember the device may no longer work on any GSM carrier within the USA due to AT&T will blacklist it.
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
I understand root alone won't unlock it. With all that being said can I still root and flash a recovery method that are permanent? Does MM still not have a reliable root or recovery method?
jlgarr86 said:
I understand root alone won't unlock it. With all that being said can I still root and flash a recovery method that are permanent? Does MM still not have a reliable root or recovery method?
Click to expand...
Click to collapse
You would need to downgrade to KitKat to do that. But remember once you downgrade you'll no longer be able to go back to any official firmware Past KitKat without an AT&T SIM card of some sort to ota update it.
Also remember if you get an unlock code you need to be running stock D850 firmware or else you won't be able to enter the unlock code.
Sent from my iPhone using Tapatalk
hyelton said:
You would need to downgrade to KitKat to do that. But remember once you downgrade you'll no longer be able to go back to any official firmware Past KitKat without an AT&T SIM card of some sort to ota update it.
Also remember if you get an unlock code you need to be running stock D850 firmware or else you won't be able to enter the unlock code.
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
Are there any unofficial MM or Lollipop ROMs that are worth looking into? I couldn't care less if it's official honestly. And that last bit you said, you mean if I wanted a phone unlocked I'd have to basically wipe my phone?
jlgarr86 said:
Are there any unofficial MM or Lollipop ROMs that are worth looking into? I couldn't care less if it's official honestly. And that last bit you said, you mean if I wanted a phone unlocked I'd have to basically wipe my phone?
Click to expand...
Click to collapse
If you unlock before you leave behind stock then no you don't have to wipe. Once you install any custom ROM, your only option to unlock at that point is to revert back to stock, which means wiping.
aybarrap1 said:
If you unlock before you leave behind stock then no you don't have to wipe. Once you install any custom ROM, your only option to unlock at that point is to revert back to stock, which means wiping.
Click to expand...
Click to collapse
Can I unlock it myself?
jlgarr86 said:
Can I unlock it myself?
Click to expand...
Click to collapse
Yes you can, if you are on stock. You will need to get the unlock code from AT&T, be on stock firmware, and have an active SIM card from another carrier (I.e. T-Mobile or of it's MVNOs like MetroPCS). Once you have the unlock code, put in the SIM card, turn on the phone, and you will get the prompts for the code you got. Then you're done.
I bought an AT&T S8+ from my friend and I unlocked it.
I was wondering if it was worth the hassle to Carrier Switch and then flash Unlocked firmware?
My CSC says ATT/ATT/ATT but I mean it works on T-Mobile and I heard the last 3 are permanent so even if I carrier switch, it'll be TMB/TMB/ATT or something like that.
What does carrier switch even do?
Can I follow this method even though my model number is SM-G955U and not SM-G955U1?
https://forum.xda-developers.com/galaxy-s8+/how-to/snap-guide-flashing-standard-fw-carrier-t3627255
SomeAsianDude said:
I bought an AT&T S8+ from my friend and I unlocked it.
I was wondering if it was worth the hassle to Carrier Switch and then flash Unlocked firmware?
My CSC says ATT/ATT/ATT but I mean it works on T-Mobile and I heard the last 3 are permanent so even if I carrier switch, it'll be TMB/TMB/ATT or something like that.
What does carrier switch even do?
Can I follow this method even though my model number is SM-G955U and not SM-G955U1?
https://forum.xda-developers.com/galaxy-s8+/how-to/snap-guide-flashing-standard-fw-carrier-t3627255
Click to expand...
Click to collapse
I buy my S8+ on Sprint and flash unlocked firmware and for me, it's worth, only lost VoLTE but i really don't care about it. gain more user space because unlocked firmware have less bloatware and I think it have more battery life. I didn't make any carrier switch.
Sorry for bad english haha. And yes, doesn't matter, you can flash it safe.
I have the latest firmware from SamMobile and Odin 3.12. I also see the video tutorials on youtube on how to use those 2 items to get the flash done. Question, I will be switching carriers at the same time of my flash. I do not need to unlock the phone from ATT before the flash, do I? I thought that that phone unlocks were only needed when keeping the same load on your phone, while switching carriers?
You can't really mess this up, can you? In other words, of something doesn't work before the flash starts loading, you can keep troubleshooting it. Once the flash starts, that basically means you go it, correct?
Are there any other items I'll need or things to do before I flash the Tmobile FW onto my ATT GS7?
If the phone is carrier locked you won't be able to use it with another SIM until unlocking it, regardless of firmware. I assume you've already tried it with the T-Mobile SIM?
Babadebucci!
So firmware is your phone currently using? still the att?
RossTeagan said:
So firmware is your phone currently using? still the att?
Click to expand...
Click to collapse
AT&T, it's stuck on the May security patch.
I had an att s6+ before and used it oversea. I never got any ota updates. Only hope is Odin. You may want to att s8 forum to confirm.
Looks like it is my only hope. What exactly is Odin and do I flash a carrier one or a stock one. Then if I do the stock one do I get normal updates.
Possible for anyone to link me to a guide on how to flash this unlocked AT&T s8+ to a factory unlocked one or a Three-UK one? Also by doing this will over the air updates start working.
I think att locked the bootloader so no you can not flash other carriers rom. Sorry.
I have a Sprint-branded S7. It's unlocked. I want to switch to T-Mobile.
Sprint changed its S7 bootloader to v5 in November 2017. All other carriers, including T-Mobile, are on bootloader v4 or earlier.
The problem: You can't flash to an older-version bootloader. You'll just get an error. The phone has efuses that prevent it.
Are there any workarounds?
Specifically, I want to switch this S7 from Sprint's G930PVPS5BRA1 to T-Mobile's G930TUVS4BRA1 (bootloader version emphasized).
No work arounds I've ever seen, US snapdragon models are all bootloader locked which prevents you doing any major modifications at a firmware level.
You'll either have to wait for a v5 of the firmware you want, or try the carrier unlocked G930U v5 firmware which might work better with T-Mobile.
I believe this is also the same for the unlocked bootloader on Exynos models, but only if you get the newest drag firmware version.
Beanvee7 said:
No work arounds I've ever seen, US snapdragon models are all bootloader locked which prevents you doing any major modifications at a firmware level.
You'll either have to wait for a v5 of the firmware you want, or try the carrier unlocked G930U v5 firmware which might work better with T-Mobile.
I believe this is also the same for the unlocked bootloader on Exynos models, but only if you get the newest drag firmware version.
Click to expand...
Click to collapse
Unlocked is also on bootloader v4: https://www.sammobile.com/firmwares/galaxy-s7/SM-G930U/. That is why I suspect this v5 bootloader is a trick by Sprint to frustrate switching.
Booloaders are all locked on US S7s you can not switch Stock ROMs
You could SIM unlock and use a T-Mobile SIM though (paid)
Or sell that phone and buy a tmobile one
*Detection* said:
Booloaders are all locked on US S7s you can not switch Stock ROMs
You could SIM unlock and use a T-Mobile SIM though (paid)
Or sell that phone and buy a tmobile one
Click to expand...
Click to collapse
This phone has the domestic unlock by Sprint, so I can switch stock ROMs. I did exactly that last summer when Sprint and T-Mobile's ROMs both had v4 bootloaders.
Because it is unlocked, you are right that I can also put in a T-Mobile SIM while it has the Sprint ROM. However, it will not see all T-Mobile bands until I put T-Mobile firmware on it. I noticed that last summer, and there are other anecdotal reports of this on the internetzors.
novasource said:
This phone has the domestic unlock by Sprint, so I can switch stock ROMs. I did exactly that last summer when Sprint and T-Mobile's ROMs both had v4 bootloaders.
Because it is unlocked, you are right that I can also put in a T-Mobile SIM while it has the Sprint ROM. However, it will not see all T-Mobile bands until I put T-Mobile firmware on it. I noticed that last summer, and there are other anecdotal reports of this on the internetzors.
Click to expand...
Click to collapse
Pretty certain that all bootloaders on the US model S7s are locked meaning you cannot switch stock ROMs, other than Verizon to the G930U, maybe others to that U firmware, but I don't own the snapdragon variant so just going on what I've read here on XDA
All Snapdragon US S7s are bootloader locked, meaning no custom anything
As for certain bootloaders of each stock ROM I don't know
But I do know SIM unlock and bootloader unlock are two completely different things, switching from one carrier ROM to another does not unlock the SIM to that carrier
*Detection* said:
Pretty certain that all bootloaders on the US model S7s are locked...
Click to expand...
Click to collapse
They are locked against unauthorized/custom software, but there is nothing that stops you from putting authorized software on them. As all US variants are hardware-identical, all carrier ROMs are by definition authorized on any.
novasource said:
They are locked against unauthorized/custom software, but there is nothing that stops you from putting authorized software on them. As all US variants are hardware-identical, all carrier ROMs are by definition authorized on any.
Click to expand...
Click to collapse
I see, but what would be the point of switching from Sprint to T-Mobile stock ROM?
Surely just different OEM bloat?
*Detection* said:
I see, but what would be the point of switching from Sprint to T-Mobile stock ROM?
Surely just different OEM bloat?
Click to expand...
Click to collapse
While the hardware supports all bands, the ROMs do not have all bands enabled. From personal experience last summer, if you have the Sprint ROM on the phone, your phone will not see all T-Mobile bands. There are plenty of anecdotal reports of this on the internet.
novasource said:
While the hardware supports all bands, the ROMs do not have all bands enabled. From personal experience last summer, if you have the Sprint ROM on the phone, your phone will not see all T-Mobile bands. There are plenty of anecdotal reports of this on the internet.
Click to expand...
Click to collapse
I was under the impression that only SIM unlocking would solve that?
So you are saying that by managing to flash from Sprint to T-Mobile, a Sprint S7 is now able to use the T-Mobile network without a SIM unlock ?
*Detection* said:
I was under the impression that only SIM unlocking would solve that?
So you are saying that by managing to flash from Sprint to T-Mobile, a Sprint S7 is now able to use the T-Mobile network without a SIM unlock ?
Click to expand...
Click to collapse
SIM unlocking only appears to permit you to put your phone on another network. It does not appear to enable all your phone's bands. To enable another network's bands, you appear to have to switch ROMs. If there's another way of doing that, I'm interested!
novasource said:
SIM unlocking only appears to permit you to put your phone on another network. It does not appear to enable all your phone's bands. To enable another network's bands, you appear to have to switch ROMs. If there's another way of doing that, I'm interested!
Click to expand...
Click to collapse
My guess is you would first need to perform the actual SIM unlock, and then move over to the preferred network ROM to have 100% of their bands and abilities
If your phone was originally on Sprint, and you managed to flash to T-Mobile, my guess is that your T-Mobile SIM would still not work until you SIM unlocked
CSC change is what determines which features work and don't, for example on o2 CSC I can get WiFi calling, but with XEU (also UK ROM) I cannot, even though my carrier is o2, basically I bought the phone on XEU but unless I switch manually over to O2 CSC I cannot use that feature
*Detection* said:
My guess is you would first need to perform the actual SIM unlock, and then move over to the preferred network ROM to have 100% of their bands and abilities
If your phone was originally on Sprint, and you managed to flash to T-Mobile, my guess is that your T-Mobile SIM would still not work until you SIM unlocked
CSC change is what determines which features work and don't, for example on o2 CSC I can get WiFi calling, but with XEU (also UK ROM) I cannot, even though my carrier is o2, basically I bought the phone on XEU but unless I switch manually over to O2 CSC I cannot use that feature
Click to expand...
Click to collapse
Yes. Another way of putting this is that SIM unlock and band unlock are different. Sprint can unlock the SIM and let me put other carriers' SIMs in my phone. However, that doesn't unlock all the bands. That is only doable by flashing that carrier's ROM. Due to Sprint's curious choice to upgrade its bootloader, I am locked out of doing that.
I have previously been in a state where my CP was from a different-version SM-G930U ROM, while the rest was from an SM-G930P ROM, and I got repeated "Security notice" warnings from the Samsung software.
HELP
Beanvee7 said:
No work arounds I've ever seen, US snapdragon models are all bootloader locked which prevents you doing any major modifications at a firmware level.
You'll either have to wait for a v5 of the firmware you want, or try the carrier unlocked G930U v5 firmware which might work better with T-Mobile.
I believe this is also the same for the unlocked bootloader on Exynos models, but only if you get the newest drag firmware version.
Click to expand...
Click to collapse
I am somewhat experienced in this but not enough to be sure. I have sm-g30U factory unlocked by sam and got oreo update and hate. How may I check my versions or rather where might I find the proper software to downgrade to nougat . I dont understand why people keep saying "930U sprint, or vzw" . When its unlocked its not any carrier only the carrier you happen to use as its a dual sim right ? though today im with vzw i may not be tomorrow. Anyway can i flash backwards , I saw a few videos where it was done on sammobile and if not I would love to get any info in rooting it to help my battery not liking the oreo so i can help at least with bloatware. any help would be appreciated
nocamp said:
I dont understand why people keep saying "930U sprint, or vzw"d
Click to expand...
Click to collapse
There's two types of unlock.
* Bootloader unlock, which allows you to modifies the phones boot partition. It's required for custom ROM's and recovery.
* Carrier unlock, which is just whether your phone allows any SIM or only a specific carrier.
The G930U is carrier unlocked, you can use any SIM, but it's still bootloader locked like every other US model S7, which means no boot modifications.
As a result you can't rollback the G930U because of the locked bootloader, and you can root it but only but using an engineering bootloader which comes with many side affects.
Does only the number matter or does also the letter? For example, say Im deciding between U5 and S5, how would the efuse work?
DeeXii said:
Does only the number matter or does also the letter? For example, say Im deciding between U5 and S5, how would the efuse work?
Click to expand...
Click to collapse
Yes just the number , cell carriers tend to use the letter S while Samsung unbranded tend to use the letter U. But the number tells you the version boot loader .