During the last weeks I was researching how to build a cable to establish an UART connection to my I9300. This guide should work but is still work in progress. Feel free to contribute.
Info: this is a guide for the international version I9300 w...
Please take this warning serious! As this is a debugging console to your baseband/modem the wrong command can easily overwrite vital data on you phone. Think before typing!
I won't go into detail about AT command syntax here. I recommend to read ...
If anybody else is missing gesture typing in the 20151118 ROM:
libjni_latinimegoogle.so is missing. You can manually copy it to /system/lib
Here you can find a compatible version: http://www.mediafire.com/?pb2wd2s892q2v3n
If you attempt to change the nv_data.bin within Android it will get restored from .nv_data.bak and .nv_core.bak. It is protected by a special MD5-hash which is stored in nv_data.bin.md5/.nv_data.bak.md5/.nv_core.bak.m5. The MD5-hash is generated ...
The modem stores its settings in your /efs partition (mmcblk0p3), more precisely in your nv_data.bin file. It might be wise to do a backup. (More information on EFS)
Your modem is running a Real Time Operation System (RTOS)...