Ok, I know this sounds like noob-ish, but I`ve searched the corners of the internet and can`t find an answer. I have a Samsung Galaxy Ace (5830) and I want to do something with ROM`s etc. I know I have to back-up my EFS folder, and especially the nv_data.bin file. But I can`t find it anywhere on my device! I have rooted it, I have the supermanager app on my phone (busybox, SGS, root explorer, superuser, ES files browser as well), but still neither the NV_DATA.BIN nor the EFS folder file shows up. Where the hack did they store it, and how can I back it up? Before I install ROM`s I want to be safe and don`t loose my IMEI. Anyone has an idea? Thanks in advance.