Is rooting my Android(4.2.2) smartphone under warranty safe?

[utksingh]

Hello everyone!

I recently installed Battery Doctor(Cheetah Mobile) app and in 'Smart Saving' section I found an option Autostart Management which allows me to Forbid the Autostart of various apps, but for that it asks for 'root authority'. Somewhere I heard that rooting a smartphone may lead to warranty violation. Is it true?
Now my second question if I root my smartphone and Forbid the apps from autostart would it help to run my phone smoother?

Thanks in advance!

 

[beagle82]

Hello everyone!

I recently installed Battery Doctor(Cheetah Mobile) app and in 'Smart Saving' section I found an option Autostart Management which allows me to Forbid the Autostart of various apps, but for that it asks for 'root authority'. Somewhere I heard that rooting a smartphone may lead to warranty violation. Is it true?
Now my second question if I root my smartphone and Forbid the apps from autostart would it help to run my phone smoother?

Thanks in advance!

Yes and yes