iPhone 5 will not stay connected to LTE while on a voice call.

iPhone 5 will not stay connected to LTE while on a voice call.

I noticed that something has either changed in the network and/or the Iphone 5.  I currently have a 64GB Black iPhone 5 and the grandfathered unlimited plan.  I noticed while on a voice call, the internet becomes utterly useless.  I could not find a direction that was 10 miles away from me because the map would not generate.  Just sat there loading.  I could not do an internet search for anything without it taking more than 35 seconds, connecting to the app store took close to a minute, and checking mail was useless.   These issues were not occurring on my first iPhone 5 (this is my 3rd).  I even bragged at how fast I could do a search for directions, load them in apple maps, all while on the phone talking to someone.  For some reason, this no longer works.

 

I tested this theory on my own phone and a few of my coworkers phones.   It is reproducible.  The speeds experienced when the phone drops off of LTE is slower than 3G/4G speeds that you would normally experience when turning LTE off.  This was also tested. 
I reset, restored, set my phone up as new.  Reset network connections, etc several times and this still happens.  I called into AT&T and was told that this was normal and I should not expect a phone to use LTE while making voice calls.  Why not?  The phone isn't using LTE to make voice calls, its using the 3G network to make voice calls.  That's the purpose of the phone having 2 antennas, to be able to do this.   To tell me that this is not an option, when I witnessed it on my first iPhone is unacceptable. 

 

The results are below.  They should be read from BOTTOM TO TOP. 

 

What you will see is my LTE test that was ran before the call, 1 test with LTE turned off, 2 calls while on the phone with AT&T, and 2 calls after I got off the phone.  Took 3 more resets to get it back to normal speeds.  The 54.61 mbps is a rare occurrence.  I normally average 20 -30 mbps down and 20 mbps upload. 

 

As you can see, while I'm on the phone I get 0.00 mbps upload speed.  To tell me this is normal can not be accepted as a viable answer.  These tests were done slightly north of downtown Atlanta, GA in between AT&T cell phone towers.  Signal was not an issue. So I went from 6.70 Mbps to 0.60 mbps while on the phone.  At least give me normal 3G/4G speeds while on the phone.  I was also told that although my strength was low, this was still within normal range.  You can't tell me that 0.60 mbps and 0.00 mbps upload speed are the normal speeds.  I did not experience anything as slow as this while on an iPhone 4.  Sorry I couldn't compress the screen shot any more because I did these tests several times. 

 

My average speeds are below. 

 

 

These problems seem to happen only only on LTE and when you attempt to make a phone call.  On wifi the upload speed will suffer, but the download speed will still be around 20 mbps, but that's probably because of the ISP.   These results tell me that this is an option that can be turned on or offand some of the new iPhone 5's did not experience this.  My first iPhone 5 before I took it back was a beast with multitasking. This was a bragging point that I could do all this while actually on the phone getting the information/ directions I needed. It has to be a recent update in the network settings somewhere that is causing this issue.If you could please test your handsets and confirm whether or not this is happening on your iPhones?  A bug report has been submitted to Apple and the concern has been voiced with AT&T (who sent me back to Apple). 

Message 1 of 24 (38,470 Views)
Contributor

Re: iPhone 5 will not stay connected to LTE while on a voice call.

Experiencing the same problem as OP. Also with iPhone5 on grandfathered unlimited data plan. I don't minding dropping to 4G during calls but data speeds are nil so that most times I can't even check emails. After the call everything is fine. My iPhone 4S never did this.
Message 16 of 24 (32,602 Views)

Re: iPhone 5 will not stay connected to LTE while on a voice call.

Still no resolution. They've had me swap SIM cards, get a new phone, send them data every few weeks. All I've been told is that what I experienced in the LTE staying connected is a "future" option and shouldn't have worked.

They still won't explains why I get less than 3G and edge data while talking on the phone when my 4 does this just fine.
Message 17 of 24 (24,080 Views)

Re: iPhone 5 will not stay connected to LTE while on a voice call.

This is exactly what I'm talking about. I've gotten lost a few times when someone called me during my route. Gmaps, apple maps, waze, nothing reconnects until a few minutes after the call.
Message 18 of 24 (24,077 Views)
Highlighted
Tutor

Re: iPhone 5 will not stay connected to LTE while on a voice call.

At&t iPhone 4s doesn't support Lte so that means it uses the 4g and stats connected no matter whether your on the phone or not. Thats just how the iPhone 5 was made. It is normal. I never got dow from 4g on a call. It stays at 4g when I'm the phone. I don't get edge or 3g. 4g lte, 3g, and 4g are basically base on where your location is and if your area supports it.
Message 19 of 24 (19,135 Views)
Tutor

Re: iPhone 5 will not stay connected to LTE while on a voice call.

I'm running exactly the same issue. It happened when I moved from Honolulu, HI to Sacramento, CA. It's truly disappointing and is affecting my work efficiency. I will have to switch carriers and devices so I can talk & surf if this cannot be resolved soon. I'm waiting to hear back from AT&T advanced technical support sometime over the next 2-3 days. I'm keeping my fingers crossed as if it worked before it's sure to be able to work again.
Message 20 of 24 (18,337 Views)
Voyager

Re: iPhone 5 will not stay connected to LTE while on a voice call.

Yes, this is very odd. I had the same issue. I had the iPhone 5 for about a year. During that ENTIRE time, my phone would show connected to LTE 95% of the time since I was in an LTE supported area. I would make voice calls and my phone would continue to show LTE and my use of data WHILE talking on the phone was just fine.

 

A week ago, I upgraded to the iPhone 5S, and now when I make voice calls, my connection drops to 4G and the data speed is terrible. Why did this work on my iPhone 5 and now since I have upgraded, I am experiencing the same behavior as this individual? Something has definitely changed and I have a ticket opened with AT&T on this.

 

 

Message 21 of 24 (13,826 Views)
ACE - Master

Re: iPhone 5 will not stay connected to LTE while on a voice call.


nsgguy245 wrote:

 I would make voice calls and my phone would continue to show LTE and my use of data WHILE talking on the phone was just fine.

 

 


That is not possible. The iPhone is not capable of staying on LTE while also on a call. 

*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.
Message 22 of 24 (13,790 Views)
Professor

Re: iPhone 5 will not stay connected to LTE while on a voice call.

I agree. If an ATT iphone was still showing LTE while on a call, something was wrong with the indicator. Both AT&T and Apple have stated that when on a voice call, the data will revert to 4G or whatever is available other than LTE. They should know.
Message 23 of 24 (13,766 Views)
Master

Re: iPhone 5 will not stay connected to LTE while on a voice call.

[ Edited ]

To those wanting to try something Face Time audio only between two iPhones seems to have great voice without connection issues . http://9to5mac.com/2013/09/28/ios-7-how-to-make-facetime-audio-calls-and-check-how-much-data-they-us...

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