Problems making phone calls

[new-to-sony]

Hi

I am having problems while making calls from my Xperia L.

Sometimes when I make a call then after disconnecting the call, whether from the on screen 'end call' or the side button, it starts calling back the same contact again.
It has been happening since I bought the phone.

Is there any way to repair it?

Thanks.

[_alexdon_]

Try to downgrade:

http://talk.sonymobile.com/t5/Xperia-Z-ZL-ZR/How-to-manually-update-downgrade-root-2013-Xperias/m-p/...