Why Don't have Reboot Function

[ChesterLum]

Why My Xperia ZR don't have Reboot Functions, Everytime have some slow, hang, wifi and mobile data not response, I also need to Power Off my phone and Start Again. Can I Enable reboot function? i try to download the rebooter apps from Google play, all also need root permission. Then, How, anyone can help me on this?

[Uliwooly]

Press and hold power & volume up for 5 seconds, make sure that you only press volume up. 

it wouldn't hurt to repair your phone 

Update Service (SUS)

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[ChesterLum]

Need Power Off First , After this Press and hold power & volume up?

You mean need me using SUS to repair and reset my phone.?

[Uliwooly]

You don't have to power off first, just press and HOLD at the same time Power & volume up until the phone vibrates