Originally Posted by email@example.com
hi my handset is sony xperia u and its running on ics
i am actually very new here, so i would be glad if u can answer some of my questions
1) is rooting the device safe? because some of ur posts include that u may loose bravia engine or radio wont work and i dont want these kind of problems
2)what exactly is CWM or cyanogen or bootloader, its a bit confusing
3)after rooting my phone, can i upgrade it to jelly bean without any drawbacks or bugs in it?
i know these questions are very much annoying for you so can u just send me the link of a perfect video for rooting my device with proper steps and all
1. Rooting is safe in every devices. Its actually the process of letting you access the System files which would be locked by your Device Manufacturer. But before rooting, you must have a knowledge on why to root? Do I really need root? etc. and knowing that rooting voids your warranty. Rooting actually doesn't affect another device-specific applications like Bravia Engine or Radio app etc. but make sure you are doing it right and if these bugs have been reported be ready to face it too. Read through the Xperia U section for more info.
2. CWM = ClockWorkMod recovery, its a custom Recovery which has lot more options than your stock recovery which is coming with your Stock ROM. CyanogenMod is a customized Android ROM which has additional features built on their own and incorporated by themselves, and will be pure 'Vanilla' android which is as seen in the Nexus devices. In short, no skin'ing or theme'ing on UI will be there like TouchWiz UI by Samsung, Sense UI by HTC or Timescape or Xperia UI by Sony.
Bootloader is the space between you and your device which controls the device booting, partitions, recovery, fastboot etc. In short, messing with the bootloader will brick your device if its done wrongly. In Sony devices the Bootloader will be locked and Sony has provided detailed instructions on how to unlock it. I guess, bootloader is to be unlocked if you want to install custom ROMs, recovery etc.
3. Yes, you can. No drawbacks. 90% of XDA member's devices are rooted.
I suggest you read this thread - Getting Started:Rooting,Bootloader Unlocking,Recovery,Custom ROM installation & more
and browse through your device forum for more. Cheers !!