I found a way to bypass that friend invite thing…
Download a non modded version, play till rank 2, (You need internet) Just do the friend inv thing with your name.
Also, make a desktop shortcut so it wouldn’t delete the game’s data.
After that, plug your phone to your pc, there will be a “.android_secure” folder, find “net.kairosoft.android.soccer2_en-” forgot the rest of the name.
Delete that file, go back to your phone, install the mod, and you’re set!