Process Dumping firmware Extracting device tree, vendor tree and kernel tree Getting hardware information Finding similar hardware to copy drivers from Common Bugs Due to lack of updated firmware BLOBs VoLTE Fix 1: Open Source IMS stack https://old.reddit.com/r/Android/comments/17u5h8u/a_volte_call_with_an_opensource_android_ims_stack/ https://xdaforums.com/t/research-wip-possible-volte-enablement-for-samsung-devices-on-aosp-based-roms.4664947/