Q: iPhone 4S - Outgoing call no audio

I'm in the uk and have had this problem for the last 10 days. Took the phone (64gb black) back to the Manchester Arndale Apple store and they immediately replaced it...they wanted me to try to restore as a new phone but I said I had already restored from iCloud and others had restored as new without success. Phone seems to be working ok so far - used Siri and paired with my car over BT - so does look hardware-related. Full marks to Apple support as well.

Same issue with 64 gb.

@Jeff: using Siri or resetting does not solve the problem on my one-day-old 64gb

receiver is bad, apple store told me. i am now waiting for replacement iphone in the mail because don't want me to give a new iphone.

I had the same problem with a 2 week old 32gb black 4S - with no pattern, dialed calls would sometimes not have audio through the ear piece - switching to speaker phone briefly and back would activate audio in the ear piece every time I had the problem.

Went to the Apple Store yesterday and they replaced the phone without problem.  Brought a print out of part of this thread along with a log of number of failed attempts vs calls that had no audio problem.

So far, the phone hasn't had any issues.

Having the same problem also with 4s 32gb on Verizon. First noticed it the other day when I wasn't able to hear my music from iTunes or pandora. Then today wasn't able to hear outgoing calls. Switched to speaker and could hear. But switching back still couldn't hear anything. Still can't hear music. Even plugging in speakers in the stereo jack doesn't work. Turned off Siri, Bluetooth, and restored....no fix

Tested à theory today. If i use ex. the Vibber app and call up other Vibber contacts I can not reproduce the error.

This makes me think it's not à hardware issue but à software issue. What do you think?

Called Apple Support and got it working again with a restore. They had me press the vol buttons while my phone was on handset mode. The display still said headphone...so it was stuck in headphone mode. They then told me to plugin my headphones 10 times to see if it would switch back. That didn't work and neither did a reboot. Restoring worked for my case. Software issue for me.

Did you put your phone in DFU mode before the restore?  After restoring from DFU mode, use "set up as new iPhone."  I have to 4Ss.  One had all the problems described here and one didn't.  I did several ordinary restores that did not solve the problem.  Finally, I put the iPhone in DFU mode, then did a restore as a new iPhone.  Problem solved.  It's been several days and heavy use with no repeat of the issues I had before.

Was at the "genius" bar in the Apple store downtown Vancouver to replace the iPhone 4S again due to mic issue. Was told that it's a software issue and that they're not replacing because presumably this can be fixed with software, in the meantime it was suggested I should click the speaker on and off to solve the problem. No word on if and when Apple will release a fix. Apple has not said anything about this publicly and none of the media/blogs have mentioned this problem which seems to affect many users and perhaps all the iPhone 4Ss out there (they're too busy writing about funny interactions with Siri.) I'm very disappointed with Apple and regret buying the iPhone 4S, now I'm kinda stuck with it, I sold my iPhone 4 otherwise this iPhone 4S would have been back in the store.

I posted earlier in this forum but it has grown so big it looks like it's time for an update.  We have the same intermittent (not 100% reproducible) issue as everyone else with outgoing calls.  It is fixed 100% of the time by toggling the speaker phone on and off.  The issue was first noticed the day after we got our phones.  My phone works great and my girlfriend's phone is the one with the issue.  We live together and make calls from the same location so that is not the problem.

After doing all of the resets Apple requested and getting a new SIM card for the first phone they replaced the first phone with a brand new one last Friday, Oct 21.  It was a new phone because the 4S is so new that defective ones have not made it through the process of being refurbished yet.  The first call on the new phone after walking out the the store had the same issue as the original phone.  I was actually there almost 20 minutes after closing time because they could not figure out how to replace my phone that was bought online at the Applestore.com with a phone from a retail Apple store.

Currently, I am waiting for a call back from one of the advisors at Apple support.  She is referring this forum posting to the engineers at Apple and asking for more information.  She said it usually takes them between 1-4 days to respond to questions so I should know more information by Wednesday morning hopefully.  I will let you know what I find out and if they have any insight to whether or not this is a hardware or software issue.  Also, I would like to try the restore in DFU mode.  The previous restores have been as a new phone, not from backup and did not fix the problem.

Thanks.

The genius bar and Apple Care are a complete joke.

i agree i was thinking of going to go to

the genius bar today because of no audio

problem, but decided not to do it because

of employees' arrogant attitude and no skills in troubleshooting

complex problems. now without steve job i think apple

will go down.

Hairy G - I tried a DFU restore to the iOS5 ipsw.  Objectively, it improved the problem.. down to maybe 1/10 calls currently with no outgoing audio.. but probably just coincidence.  Given that I didnt notice the issue until day 3 of use, I half expected it to get worse as time went on...

Took the 4S to genius bar today and it was replaced (pending delivery of a new unit) without any problems.  The way the tech went through the symptoms suggested it was a known issue.

Surely if this was just a software problem it would be FAR more widespread?... thoughts?