So if i have future problems and i am in my 30 days period, i have jailbreak it and added lots of things, how i erase all trace of roms, jailbreak etc so i can exchange it if anything happens
After doing a restore from DFU mode also go to settings;general;reset; and erase all content and settings. It takes about 2 hours but will erase all traces of jailbraking. I've returned 2 jailbroken phones😱 with no issues.
Deactivate the number battery, uninstall Categories from Cydia>Manage>Packages
DFU Restore: Hold Power+Home until it gets to Apple logo, let go of Power button..screen should be completely dark..like its off, but if you connect it to iTunes it'll prompt you to restore.
jailbraking can negatively affect your battery. After you restore run it threw a few battery cycles. You got a little problem though - you can't return it jailbroken, and you can't restore it with out erasing your data🙄