I am aware that the S5 has somewhat better performance than the S4, but I am more interested in the options for ROM development and customize-ability. First off, what is the appropriate model name for the S4? (I'm on AT&T) Wondering this for compatibility purposes.. Also are there any software updates I should avoid? Will I need to go back to any old firmware/software version(s) to have better luck rotting or installing ROMs/recoveries?
Any insight appreciated, thanks!