Speaker problems /w outgoing calls

[ddl449]

First of all my Xperia S runs the latest firmware (4.1.2).

Two problems:

1) When I start an outgoing call the speaker (the regular one, not the loudspeakers) works fine. After 1-2 seconds it "dies" (= no sound). It does not have to do if the person accepts the call or not. If the person accepts the I will correctly see the time but do not hear him. If the phone is still ringing I will not hear any sound (beeps).

This get fixed if I hang up and call again... 

2) When I start an outgoing call the call will not start. It will call probably after 30-60 seconds... If I clicked again to call someone in that waiting period the phone will call simultaneously a second call (showing "Call not send") or hold this line and place a second call in the foreground on the same person...

I believe those stuff are ridicoulous making me unlike to buy a Sony smartphone again because it's just the call function and not something else which might need tons of RAM to run.

Nevertheless I'm wondering if I'm the only one in here having those issues?

[Samuel1]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

I suggest that you try to repair the phone software using PC Companion..

Before repairing your device you may want to backup your information first. Check out this topic for more information on how to.
How to backup?

If the issue should still remain I think that this needs to be examined and fixed at a repair center. For more information about how to submit your phone for repair and where, contact your local support team.