i got this phone about 2 days ago. im a heavy user. happy abt the 3k mah removable that comes with it. my point of view for this affordable budget android phone is perfect. just that i do not like the lenovo custom 4.2.2 rom that comes with it. anyone hv guide to replace with original android 4.3 or custom rom for this? would appeciate some help regarding this. thanks in adv.