Not really anything I guess besides read the instructions on some custom roms carefully if you need to flash something else and always have a backup plan if you flash custom roms so if it goes wrong you can always restore it on a good way
and like you said backup Imei partition and maybe other partitions also idk.
I also have a question for the G2 owners
Does your G2 turn on in your pocket or is it hard to press the Power button? and on the power button side if you lay it on the table is there like plastic a bit going up to not turn your phone on?
And does the G2 lays good in your hand if you are using your phone one handed? I just wonder cause I was holding the Xperia Z so a Square phone I can almost say cause it doesn't have those round edges so its notso nice in the hands but the G2 is I guess but I just want to know how it is for other G2 owners And or they also havesomething else to say about the G2 it looks for me a futuristic phone with a simple idea but nobody wanted to risk that idea to make such a phone but LG did cause life's good
if I willget the G2 it will be my third LG phone and lg rocked the whole time