copy X2 note 3.zip to ur phone storage
reboot into cwm
perform a cwm backup
wipe data/ factory reset
wipe dalvik cache
format system under mounts and storage option
install zip then choose zip form internal sdcard
select X2 note3.zip and click yes.
then reboot ;)
http://www.mediafire.com/download/bpnd8swh55vd0td/X2_note_3.zip

flush this if playstore downloading isnt working....
http://www.mediafire.com/download/dt1azuk6dmvk55u/gapps-jb-20130812-signed_Latest.zip