Calling window problem while selecting the sim card

[CallingWindowPr]

Greetings of the day
One issue I am facing since the day I bought my Xperia device I.e m4 aqua dual is that
Whenever I try to call, after selecting the contact or dialing the number at the time of simcard selective option, it always use to stuck out there, that pop-up screen fr simcard selection blinks and gone, then again I need to select the contact and as I go to select the simcard (from which I have to call) that pop-up window again blinks and goes off, sometimes I place a on 2-3 attempts, and sometimes 10-20 times too are not enough,
So it's my humble request to u guys, please look into this matter and get me a solution or a software update with the solution, because I love this phone and Xperia devices a lot, so that that this issue won't be able to force to that xtent where I throw this phone out of the window, which I never want.i am a student and I have invested my hard earned money on this phone, I think now you can get an idea of my attachment with this phone, so guys please help me to get out of this problem.
Looking for a positive revert asap.

Thanks

[CallingWindowPr]

Ahaan
1 last thing
Shall get this software repair thing from Sony service center or can do on my own with companion, your recommendation please

And if I will do on my own, will it affect my phone's warranty norms, as it is under warranty now.?

[YoGem]

You can use the XC app! Yes, exactly the companion app. It's easy and will fix lot of problems

[CameronT]

@CallingWindowProblem,

You can run it yourself on a computer at home, no need to send it away. I linked the instructions in my post but here it is again in case you missed it

It doesn't affect your warranty.

http://talk.sonymobile.com/t5/FAQ/How-to-perform-a-software-repair-with-Xperia-Companion/td-p/110305...

[YoGem]

.. And it does not void your warranty.

[CallingWindowPr]

Thank you so much
It was a good xperience
Cheers

[YoGem]

Glad to be of help  

[CallingWindowPr]

Sorry guys
But forget to discuss one more issue
Which is, whenever I restart my phone, after all those logo n graphics, it holds on a small screen stating "Android is upgrading" for almost 30 seconds or more.
May I know that reason.?

[YoGem]

At every startup? Did you by chance updated your software recently? Anyway if you are going to do software repair that should fix also the optimization processed at each startup.

[CallingWindowPr]

Yes every startup
Itz been almost 8months or more
Yes last month an automatic update was there on my phone so I ve done
Bt after that also
On every startup m facing this.

That is ok, I will do the software repair
But not now after some days

[YoGem]

Ok, let us know if that fix your problems