My s9 kept crashing, it would freeze and restart. I factory reset and now I can't get through the initial set up with out it rebooting or freezing still. Please help
I can get you started
You need a pc
Odin latest -xda forums download
Frija tool-xda forums download (for your firmware) get the latest version for both.
Once you have those let me know I can put together a guide for you .