How to make changes after repo sync

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Jaskaran498

Senior Member
Jul 29, 2012
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Ludhiana
Hi
So I am trying to build Ubuntu touch.
I have seen people adding their own things to roms. (PS-> I know about cherrypicking).
But how do I edit after repo sync? My rom has a bug, it cannot make/receive calls.
So what files should I edit and how?? I mean... there are just millions of files out there...:silly:
Please help.
Thanks.