Q: Call waiting - "End current call" - phone hangs up on everyone

This is network dependent, not phone dependent.

I'm on the phone with Verizon and they have no idea what's going on. I too experience the "Call waiting" fiasco. Tested it with my hubby's iPhone (4S) iOS7 AT&T and he does NOT experience the problem. Family members have both AT&T and Verizon. AT&T iOS7 users expereince a normal/as-expected call waiting, while Verizon users do not. Although it seems an obvious carrier issue, how come Verizon is playing ignorant?

Update: Verizon says Call Waiting and Call Merge will NOT be supported in iOS7. They consider it comparable to the "no voice and data" at the same time issue... meaning, they don't consider it a problem and will not fix either issue. The say it's a CDMA limitation. I asked them to please open a ticket, as it worked for me in the past.

It didn't work for you in the past, whether you think so or not.  It is indeed a limitation in the CDMA technology.

The phone exposes a common interface, the underlying technology can't do it.

It's not a "think so" moment Marc. I tested it using iOS 6/iPhone 5/Verizon. Works fine. However, does not work on iPhone 5S/iOS 7/Verizon.

Arg -- count me in.  Has anyone found a workaround???

Agreed. I just switched from AT&T to Verizon last month. Before, I had an iPhone 4s, and now an iPhone 5s. Both had iOS 7. When call waiting calls came in, I could pick up and either hang up the previous call or hold them. That was on the AT&T network. With Verizon, no matter which button I choose, all calls hang up. I have to literally ignore the new incoming call and just listen to it beep until they get voicemail. THEN I have to hang up my first call and return the call to the one I couldn't answer on call waiting.

Clearly it's not a technology issue, but a Verizon problem. And yes, Mark...I'm sure it worked before. At least, it did for the last 5 years that I've had an iPhone, including one using the latest iOS.

It actually worked quite well for me in the past, and here's why:

http://www.macworld.com/article/1157963/iphone_calling_differences.html

I was an AT&T iPhone customer before. Their phone supported it. The Verizon network apparently does not. So it's actually not an iOS thing, it's a carrier thing. Wish I'd have known that when I switched. :-/

Just dial Write "*#31#".... it worked for me....

Has anybody found out anything else about this! It drives me crazy that this option wont work.

AT&T users can also add more then two caller in a conference call and hang up who ever they want, what's up with that verizon

It seems you have to call Verizon to have them turn on that feature, although for the life of me I cannot understand why it isn't the default setting.

http://support.apple.com/kb/HT4515

See my reply to theolog dated April 4, 2014

I just found this thread because I have the same issue with iPhone 6 / iOS 8 on Verizon.

I called tech support and they said there was no switch or setting to make this feature work as we would expect. That said, through some experimentation, we did notice that if I hit "end current call", it looks like it hangs up on both, but from the incoming caller's perspective, it's still ringing.  Then, a few seconds later, it looks like a new incoming call from them to me, which I treat like a normal incoming call and answer.

So, from my perspective, it looks like it hung up on both and then I got a new call.  But from the caller's perspective, it just keeps ringing. 

It does take 2-3 more rings, so it seems like a long time, even though I answer their call quickly, so if you find that you don't get what looks like that second call, the person may have simply hung up because it took too long for you to "answer".

I have an iPhone 6S with Sprint and I have this same issue!  Ugh!! It's so annoying!!! If this is Apple's fault, then I'm sorry, I'm beginning to think splurging the way I have for the past 4 years on iPhones is not worth it anymore.  If the problem comes from Sprint, then I wish I would've known this prior to switching over from T-Mobile.  Sprint *****!!!!