this will flash android
if you understand what the hell ya doing do it
before you use these tools (and start flashing) check out https://source.android.com/docs/setup/test/flash
Enable OEM (check SIM if OEM is compatable)if you wanted to dump and delete some files that you don't need, here's logcat + etc...
all secret codes are mostly sm (samsung)
logcat dump (samsung only) RIL Dump (*#745# and samsung only) USB Logging Control (*#872564#) USB Settings (*#0808#)Te4mux (linuxz terminal...)
Te4mux.apkif you don't have a google account, here's the MediaFire link...
Te4mux.apk (MediaFire)