whatsapp signature bypass

[byomi]

Can u make a simple tutorial on how the bypasser actually work or how to do it manually for learning purposes i searched alot and tried but didnt reach anything i want to learn reverse engineering for android apps but there is no source where can i start nothig helping i learned smali a little but simple change in code make the app crash like change false to true so if u could help me find out how the bypasser work or some resources to learn it myself