hey guys, i got this issue. i rooted my phone and start to play with custom rom. i download one of the CM nightly edition and then flash it and flash the latest GAPP for 4.3. now i couldn't get into the OS and the screen only appear samsung galaxy s3. I tried to go into my recovery but cannot do anything. IT said the device couldn't mount 'data'. can help me?

scared me.. i can go into OS already but i encounter a lot of hanging problem today. I tried to flash different version into my phone but still encounter hang especially when accessing play store. any idea what happened?

one strange thing, when i take out the battery and the battery power show let's say 20% left and then use the phone not long, it hanged again. take out the battery again and put it in and the battery power status increase to 30%.

done a lot times but still the same. what happened ah?