Over the past few years, a suspicious number of companies have started to "take care of your data", aka block/strictly limit your ability to unlock the bootloader on your *own* devices.
While this may not affect you directly, it sets a bad precedent and it might be a good idea to keep track of companies and workarounds.
In the past, Huawei allowed you to unlock with a special code you get by submitting some information to emui.com (IMEI, serial, model, and product ID), but in 2018 "corporate values have changed" and the site went down. <br/>
I don't recommend paid methods due to general sketchiness. I have used one of these tools a while ago, it was okay.<br/>
Through HCU-client (Not everything is supported + incredible prices https://hcu-client.com/buy/) or DC-Unlocker (Same problems as HCU https://www.dc-unlocker.com/buy)
In the flaming pile of HMD's "great" decisions to improve Nokia, one stands out more than others: They decided to follow the fresh "lock the bootloader" trend.<br/>
The most annoying part about them is that you *can* unlock your bootloader, but only if you can enter fastboot. And guess what? They locked fastboot with an RSA key!<br/>
As per Realme, they decided that segregating people by ~~race~~ their phone's region is cool. If you didn't buy your phone in China or India, chances are you won't be unlocking anything anytime soon.
In April-May 2023 you could unlock any Realme phone using this script https://github.com/turistu/rmx3474-rooting, but on May 26th Realme posted this joke of an announcement on their forum https://c.realme.com/in/post-details/1661960232244367360 <br/>
The script *might* still work on some models. (Not a lot of info is available) <br/>
If you need DeepTesting, try this: https://forum.xda-developers.com/t/unlock-bootloader-help.4425415/post-86777721
Older MTK-based models can use the [mtkclient method](https://github.com/melontini/bootloader-unlock-wall-of-shame#mediatek). There *might* be a Unisoc method, but I've never seen it.
Seeing how easily Realme dropped the ball on their global users, I personally would be worried about their future plans.
For now you can use any of the guides here https://c.realme.com/in/post-details/1248075024070344704 (They're just copy-pasting the same info as the unlock process didn't change much at all)
If you need DeepTesting, try this: https://forum.xda-developers.com/t/unlock-bootloader-help.4425415/post-86777721
### 2. Samsung (Exynos)
If you have an Exynos-based Samsung, you can unlock your phone, but this will permanently trip Knox. As a result *any* Knox based features will be broken *even if you re-lock*. This includes, but not limited to: Samsung Pay, Pass, Flow, Health, Secure Folder, Secure Wi-Fi, Smart View. Can you be denied warranty? Probably...
Some of those features can be fixed with this LsPosed module https://github.com/BlackMesa123/KnoxPatch and this Magisk Module https://github.com/BlackMesa123/KnoxPatch#knoxpatch-enhancer.
