Why unlock bootloader?

[metllicamilitia]

I want to preface this by saying I've requested my unlock token a few hours ago. I have a T-Mobile variant 7t that I want to put on the OnePlus release and get updates from OnePlus. That's as far as I want to go. From reading guides and such, I don't see any mention of TWRP or other recovery. Just a simple fastboot flashing. I have access to fastboot without unlocking the bootloader. So I was just curious if there's something in the bootloader that prevents the flashing or some other reason for unlocking it other than to do a full root after flashing. Also, would I be able to just flash the same current version downloaded from OnePlus to get onto global or does it have to be a a different folder with more images? Thanks in advance for the help. Just want to be sure I know what I'm having to prepare for before flashing next week when I get the unlock code.

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[clsA]

I want to preface this by saying I've requested my unlock token a few hours ago. I have a T-Mobile variant 7t that I want to put on the OnePlus release and get updates from OnePlus. That's as far as I want to go. From reading guides and such, I don't see any mention of TWRP or other recovery. Just a simple fastboot flashing. I have access to fastboot without unlocking the bootloader. So I was just curious if there's something in the bootloader that prevents the flashing or some other reason for unlocking it other than to do a full root after flashing. Also, would I be able to just flash the same current version downloaded from OnePlus to get onto global or does it have to be a a different folder with more images? Thanks in advance for the help. Just want to be sure I know what I'm having to prepare for before flashing next week when I get the unlock code.

Sent from my HD1907 using Tapatalk

I'm following your thread, I should get my bootloader unlocked in a week also.

From what I have read you'll have to be bootloader unlocked only to flash the global rom.
once your on the Global you can do regular updates with the phones built in local update feature.

I myself never relock the bootloader, but I have seen posts where other do

 

[Kollachi]

I'm following your thread, I should get my bootloader unlocked in a week also.

From what I have read you'll have to be bootloader unlocked only to flash the global rom.
once your on the Global you can do regular updates with the phones built in local update feature.

I myself never relock the bootloader, but I have seen posts where other do

Relock the bootloader with non stock rom is never recommended. On Xiaomi phones you will definitely brick your global device for example of you have indian rom or eea rom on it! Don't know about OnePlus.

 

[metllicamilitia]

I'm gonna bump this to add another question. What's the best way to back up everything before unlocking the bootloader and flashing the global rom?

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[ChrisFeiveel84]

I'm gonna bump this to add another question. What's the best way to back up everything before unlocking the bootloader and flashing the global rom?

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you can flash the global rom without unloking the bootloader
flash the global rom with the build in updater (lokale updater )

and backups from your apps and settings can you make with the oneplus switch

 

[metllicamilitia]

you can flash the global rom without unloking the bootloader
flash the global rom with the build in updater (lokale updater )

and backups from your apps and settings can you make with the oneplus switch

T-Mobile removes the local update.

 

[awaraarawa]

Once the device has been flashed to Global ROM, how would TMobile have access to the device to remove the local update? What is their hook/access mode since the ROM is now Global and their variant?

I am about a week old into OP7T and have dreams of moving to the Global ROM, primarily for the dual SIM feature. I recognize that there are other benefits as well but the dual SIM is what I need now.

 

[nolimit78]

Once the device has been flashed to Global ROM, how would TMobile have access to the device to remove the local update? What is their hook/access mode since the ROM is now Global and their variant?

I am about a week old into OP7T and have dreams of moving to the Global ROM, primarily for the dual SIM feature. I recognize that there are other benefits as well but the dual SIM is what I need now.

No, they can't. Once you convert, you're free. It's only if you start and stick with TMO that they have that control.

 

[awaraarawa]

Thanks, nolimit78. I was confused by @metllicamilitia's post (https://forum.xda-developers.com/showpost.php?p=83005797&postcount=6) which seemed to suggest that TMobile removes the local updater....perhaps, that is different than the flashing of the Global ROM?

 

[metllicamilitia]

Thanks, nolimit78. I was confused by @metllicamilitia's post (https://forum.xda-developers.com/showpost.php?p=83005797&postcount=6) which seemed to suggest that TMobile removes the local updater....perhaps, that is different than the flashing of the Global ROM?

Yes, when you go to the software update page on the global ROM you have options and one of them is local update. Anything other than OTA from T-Mobile is removed in their build.

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[metllicamilitia]

Once you're on the global ROM you have access to those options.

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[awaraarawa]

Yes, when you go to the software update page on the global ROM you have options and one of them is local update. Anything other than OTA from T-Mobile is removed in their build.

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I am just a noob with limited experience with mobile platform. So, please bear with me. Your reply suggests that the Global ROM provides for OTA from TMo as the only option and everything else is removed from the Global ROM build, right? If yes, why would TMo provide updates when it is not their build/ROM? And why would anyone switch to a Global ROM if the updates are going to be from TMo? I thought one of the benefits was to get faster updates and avoid slow TMo updates.

Perhaps, I have this completely backwards?

 

[metllicamilitia]

It's backwards. T-Mobile removes all the options for updates from the T-Mobile build. Getting onto the global ROM gives the options back.

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[metllicamilitia]

This is what the system update screen looks like on the global ROM.

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[awaraarawa]

It's backwards. T-Mobile removes all the options for updates from the T-Mobile build. Getting onto the global ROM gives the options back.

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Thanks, mate. I am with you now. I got it bass ackwards.