IPHONE 4s call failed??!!!

I have the same problem with my iphone 4s 16GB ios5.1 in Italy (TIM). Has anyone solved the problem? I went several times to the apple store but they aren't able to solve it.

Still having same problem !!! Even though i've updated to 5.1...

Call failed-No Signal-Searching

Apple pls get a decent upgrade !!!

If you update your phone to 5.1 you'll have both 3g toggle and celluar data...

UPdate your IOS, it works fine then. I Had a same problem when i bought my 4s, i was realy nervous about this call drop thing.

Iphone 4s IOS 5.1 call failed problem happens when you loose 3G network signal during a call. I agree with @anthonyamber.

I have the same problem and it is very frustrating!

Sorry Apple,

I called Rogesrs supportandtheyupdated myprofile3gandsince then Ihave no morecall failed.

Thank you for your great product.

Dear Ahmed,

i've the same problem with my 4S.
Whenever I keep the "CELLULAR DATA OFF" calls are not dropped at all.

Any updates on this problem?

Is it my iphone's problem?

I've the same problem with my 4S..

Any solutions so far?

Thank you.!

I have downgraded my firmware to 5.0.1 (9A405), i didn't have drop calls so far. I hope it really fixed this problem.

Updating to the last version of the firmware completetly fixed for me...

I will get another sim card, but this time I will go to apple store with the sim, my laptop and they will set everything up from scratch... fingers crossed...

I have sprint and Im having the same problem and sprint said they r redoing there system and it takes 3 months to complete!

Same issues as all of you :-(

dropping phone calls left and right - done everything possible to software, setting etc

iPhone 4S 16gb, Sprint, in service since Mar 2012

Yo, fourth iPhone 4s... Guess what? Call failed :)

Well, today is ios6-day! Hoping all rumours about this being fixed are correct!!!

Keeping you posted, hoping you are doing the same :)

Just got Call Failed with iOS 6 on IPhone 4s...... This *** :(