Xperia SP keyboard input and volume key problems

[Sparkles1]

After updating my Xperia SP with the latest Android 4.3, I am unable to change my keyboard input method. Whenever I select it, the phone will restart immediately. I have restarted my phone numerous times but the problem remains. I have also selected 'repair' on the PC Companion but it claimed that there was no problem to be repaired.

Another problem that has surfaced is the volume. Whenever I use the volume keys, all that appears on the screen is this small rectangular box that does not indicate the volume level. 

Please advise on this matter, thanks!

[Latte]

You can try to reinstall firmware and for volume problem, change default theme and restart your phone. Then you can use other themes without this problem.

[Danial-mach1]

Tyr repair your phone by sus..

For volume indicater switchto default theme and reboot

[Sparkles1]

Thank you both for your help; there was no need to reinstall the firmware nor repair the system...I just changed it to the default xperia theme and restarted - and both the problems were gone!

Thanks again for the help!:)

[amir_oio]

My problem is a bit different with you , my volume in handsfree is ok but after I unplug the handsfree the whole my volumes gone . is there any soloution for it ?

[_alexdon_]

Have you tried clearing data for smart connect in settings-apps-all?