After unlocking the bootloader on my S10e I was unable to flash an unofficial Lineage OS 17.1 (Android 10) ROM to my device. I was originally on the stock AT&T ROM which STILL (January 2021) hasn't been updated to Android 10. Most other carriers have released Android 10 for their S10 devices but AT&T not only is shipping devices with fully locked bootloaders but also aren't supporting their customers with updates. With the power of modern technology and a little ingenuity we can right these wrongs.
First you'll need an unlocked bootloader so you can flash your device with Odin. I was able to purchase an unlock for my S10e from SamPWND (read my article here) but if you already have an unlocked bootloader you're ready to flash.
Two tools are required for this update process. Frija for downloading the updated stock Android 10 ROM and Odin3 to flash your device in download mode.
An Android 10 Custom Rom requires your device to already be on Android 10 to flash it successfully. Since AT&T hasn't released a version of Android 10 I used Frija to download a clean ROM. I needed to use the SPR (Sprint) code in CSC which specifies the carrier. Check for updates, then download. Frija will decrypt the update so you can use it with Odin.
Once you've downloaded the update unzip it somewhere. You will have a few files that match the input fields in the Odin3 tool. Put your device into Download Mode and set each of the fields to their matching file from the update. Even the BL field. This will NOT relock your bootloader. You can flash TWRP or a custom recovery after you have verified you can boot into Stock Android 10.
Flash and Wait. Then your device should reboot into Android 10!
Some said it was impossible. Others dared to try. I dared to spend $100 and download a sketchy USB Redirector software to have someone else run their custom tool remotely to unlock my device. I had the resolve. I dared to swipe my credit card.
It's no secret that Samsung devices have shipped with permanently locked bootloaders on most US carriers for many years now. I recently purchased a used S10e SM-G970U ATT and was unfortunately reminded of this. Somehow I had forgotten what a pain it was to unlock these things before my purchase. After some research when I found the OEM unlocking feature in Developer Options was missing in Android. Some more research later I learned that unlocking is in fact possible. Possible if you have the means. A functional exploit for S10, S20, and Fold/Flip devices does in fact exist to unlock the bootloader but it is private and proprietary. I purchased an unlock for $100 flat from https://www.sampwnd.com/ and it worked great. Hopefully this exploit is released to the public in the future but this is out best shot currently.
So I provided my DID adb shell getprop ro.boot.em.did and paid my hundred bones. Then I waited for a Discord message. They can either contact you with Telegram or Discord it's up to you. After getting a message to download some software called usbredirector-customer-module.exe I connected to their session with my device in Download Mode and within 10 seconds my device rebooted with an unlocked bootloader.
Provides account lookups, match history, profile multi-search, statistics and more. Like OP.GG or Blitz.gg for the Chinese (CN) League of Legends Servers. Available for all area ID's including the Super Server (Dopa/Apdo plays here) which is Area ID 31.
Pregame lobby Multisearch, Game Details and Profile Statistics from WeGame/Tencent League of Legends LoL API
Have you ever wanted to access data from an application that doesn't provide a Public API? Well I've got great news. That application is getting its data from somewhere. You just need to find out how to plug into it! This process is called Reverse Engineering (Or hacking if you want to pretend you're really smart) a Private API. I will document some tips and useful tools that will help you reverse any Private API from any application on any platform.
There are a handful of tools that can be used to complete this task. Windows 10 was my platform of choice for working with the data so I'll be sharing what I used on here.
Fiddler: Fiddler is an HTTP/HTTPS Proxy that can be used to intercept and decrypt SSL/HTTPS traffic. This application is also useful for replaying requests, creating custom request, and exporting a request as cURL to be converted into Python 3. Fiddler is free to use, just sign in with your Google Account! Make sure you install the certificate and enable HTTPS mode so you don't miss any requests. https://www.telerik.com/fiddler
MitM Proxy: Man in the Middle Proxy is a great way to read data from Smart Phone Applications. This is what I used to get all the data I needed for my API reversal. Simply download the executable from https://mitmproxy.org/ to start up a server (disable your firewall or open port 8080) and then enter your PC's IP address into the Proxy Server settings of your Phones WiFi settings. After that navigate to http://mitm.it/ on your Phone and install the provided certificate. Follow the provided instructions on http://mitm.it/ and start sniffing!
Create a text document to save all your finding and especially any useful URL endpoints you find. Having your information organized will help to ensure that you don't waste time on the same thing twice or need to proxy your device over and over again to find what a request should look like.
Chrome. It's the best browser. But it also has some quirks I personally find annoying and by the power vested in me I shall right these wrongs.
Quirk One - New Tab Google Doodles
I don't mind the design of the new tab page in Chrome. In fact I think it's pretty nice. HOWEVER I really don't like the design language of the new tab page being compromised for the Google Doodle. Due to security limitations in the permissions Chrome can grant Extensions we are not able to intercept or modify requests on chrome://newtab. Instead a near perfect recreation of the new tab page was built from scratch to provide all the same functionality with a local mirror.
Disable Google Chrome Google Doodle - Default new tab (left) vs Recreation (right)
As a result, no doodles. If you really want you can change the search box's color back to white but I think it look nice this way. The signin and voice search are purely cosmetic.
This is less of a problem with Chrome itself and more of a problem with Windows 10 and their ugly scrollbars. Using Webkit CSS we are able to override these system defaults. When creating this extension I wanted to keep the permission model as light as possible. This extension requires the all_urls permission to keep a unified theme across all pages and as such is a big security risk. Because of this I am utilizing pure CSS and content_scripts. This extension is completely static and thus cannot read and page content or browsing data.
Chrome minimal scrollbar - Default Windows 10 (left) vs Custom CSS only content_script extension (right)