mobile

Hello,

I wanna change this file: system/costumize/cid/default.xml

I know that I'll have to root, BUT, my question is, if I changed that system file to get arabic support (AND I wanna keep the update avalilable for phone)

Is it possible? Or messing around with a system/ file will make my phone un-updatable? I remember while back it was working fine, but I think I heard wiht lollipop it wont work anymore, I wanna know please.

Thank you !