No sound when making a call

[Foevlo]

I can't make. Call on my phone there is no sound

[Uliwooly]

Repair your phone with SUS or PCC 

Update Service (SUS)

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

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

[Uliwooly]

If that doesn't work then take it to a Sony repair center 

Also, open all the cover/flaps and look for a white rectangle in each compartment, if its pink or red then there's water damage