Home / Bug Watch / Unlocking the bootloader on the T-Mobile OnePlus 7T Pro 5G McLaren breaks your ability to install updates

Unlocking the bootloader on the T-Mobile OnePlus 7T Pro 5G McLaren breaks your ability to install updates

House owners of the T-Cellular-exclusive OnePlus 7T Professional 5G McLaren curious about bootloader unlocking the system for root or ROM functions ought to assume twice earlier than they do. Primarily based on latest stories, that course of can stop the cellphone from with the ability to obtain future official updates, together with one which was simply launched.

As effectively documented on this weblog publish, the problem stems from the truth that unlocking the system’s bootloader (which requires a service unlock) triggers a full wipe of the userdata partition, deleting a vital file saved there and which is required for updates to be put in. That is all a part of the “grasp reset with {hardware} keys” course of documented right here (extra generally often known as a “manufacturing facility reset” by way of restoration), and I ought to notice that manually performing the maneuver described there in restoration exterior of the bootloader unlocking course of additionally breaks updates — so do not do it.

The “grasp reset” wipes the userdata partition, eradicating a symlinked picture file containing a couple of OnePlus apps saved in that partition. This file by itself is not needed for the cellphone to work, however it’s sadly required for updates to be appropriately put in. In essence, the cellphone freaks out when making use of so-called “delta” incremental updates if it thinks it has been tampered with. Eradicating that file convinces the cellphone that that has occurred, breaking the power to put in these delta updates.

Since unlocking the bootloader triggers a wipe of the userdata partition as a safety measure, which means unlocking the bootloader will stop the cellphone from appropriately downloading and putting in updates.

An replace failing because of the course of described. Picture: OnePlus Boards

By itself, this would not be a difficulty for the foundation and ROM crowd, who are sometimes used to inconvenient workarounds for software program limitations, aside from the truth that the lacking file is not publicly accessible and full pictures to revive a totally working system — often the last-ditch effort for fixing a major problem like this — aren’t accessible. In case you unlock the bootloader of your OnePlus 7T Professional 5G McLaren proper now, or carry out a “grasp reset” by way of restoration, you lose the power to put in updates, at the very least for the meantime.

We have reached out to each OnePlus and T-Cellular for extra data, in addition to particulars relating to how every plans to repair the issue and when, however a response wasn’t instantly forthcoming. A few of these affected by this drawback have been capable of efficiently securer system replacements from T-Cellular.

Within the meantime, I urge system homeowners to not try a bootloader unlock or wipe their gadgets by way of restoration. We hope, at the very least, that the in-software “grasp reset”/manufacturing facility reset does not trigger the identical problem, although I assume stories could be extra widespread if it did.

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