Touchscreen freeze after declining a call

[Planins]

Ever since I got my iPhone 5S, whenever I decline a call by pressing the power button twice, the touchscreen becomes unresponsive until I lock the phone and then unlock it again. I have always thought this is a bug in iOS but now that almost half a year has passed, I am beginning to think my phone is somewhat at fault. I have restored it since and even set it as new a couple of times but to no avail. Do you guys have the same problem or not?
My iPhone is the 32GB unlocked european version. Thanks!

 

[Max(IT)]

IIRC it happened to me a couple of times, so it could be a software bug.
But it is very difficult to reproduce, since I'm declining calls every day but that doesn't happen.

 

[Planins]

IIRC it happened to me a couple of times, so it could be a software bug.
But it is very difficult to reproduce, since I'm declining calls every day but that doesn't happen.

It happens every single time I do. But my phone functions perfectly, absolutely nothing wrong with it. Doesn't look like a hardware malfunction to me...

 

[curropb]

It happened to me several times.

Software issue (one more)...

 

[I7guy]

Tried about 10 times and couldn't get the phone to "freeze". It does seem to hang up for a second or so while the call is being routed to voice mail, but that's it.

 

[Max(IT)]

It happens every single time I do. But my phone functions perfectly, absolutely nothing wrong with it. Doesn't look like a hardware malfunction to me...

It's very strange it happens every single time for you.
That's not the normal behavior...

 

[Planins]

It's very strange it happens every single time for you.
That's not the normal behavior...

I wish I had an Apple Store in my country but the best I can do is bring it to my carrier and they would never see that as an issue. Thank you for your answers anyway!

 

[gardiboy]

Have you tried..

1) Doing a restart & hard reset of phone?
2) Force closing the phone app?
3) Removing the SIM card and re inseting?
4) Reset All Settings?
5) Erase all Contents & Settings without restoring from a backup?

 

[Max(IT)]

I wish I had an Apple Store in my country but the best I can do is bring it to my carrier and they would never see that as an issue. Thank you for your answers anyway!

I'm sorry.
That's the reason why I wouldn't buy an iPhone in a country without a proper Apple store available.

 

[Planins]

Have you tried..

1) Doing a restart & hard reset of phone?
2) Force closing the phone app?
3) Removing the SIM card and re inseting?
4) Reset All Settings?
5) Erase all Contents & Settings without restoring from a backup?

If you had bothered to read my post, you'd have seen that I have restored the phone as new more than once, let alone force closing the phone app...

Thanks for the help anyway, I appreciate it.