Dropping lte when placing a phone call

iknownothing

Well-known member
Jun 26, 2010
64
4
0
Visit site
Is anyone else having this bug? Whenever I place a phone call my phone drops the lte signal. I am however still connected to hspa. Having been on sprint for the last 8 years this is hardly a deal breaker for me. I am nevertheless considering exchanging the phone for another one without the issue (if there are any left). Am I missing something here!?

Sent from my HTC One X using Android Central Forums
 

iJITSU

Well-known member
Dec 18, 2010
68
5
0
Visit site
It's not a bug. LTE for AT&T is data only. When you make a call it does so on the HSPA/HSDPA network and then picks up LTE when done.
 

iknownothing

Well-known member
Jun 26, 2010
64
4
0
Visit site
Thanks for the info. It still sounds like a bug to me, just one with at& t's network instead of the phone. I am relieved to know my phone is working right though. Thanks again!

Sent from my HTC One X using Android Central Forums
 

live4nyy

Well-known member
Sep 14, 2011
98
10
0
Visit site
Thanks for the info. It still sounds like a bug to me, just one with at& t's network instead of the phone. I am relieved to know my phone is working right though. Thanks again!

Sent from my HTC One X using Android Central Forums

It is NOT a bug, or an issue, or anything like that. That's just how LTE works right now. They can only use it for data. The technology to use voice over LTE (VoLTE) has not been implemented yet, not even on Verizon (though Verizon does have test markets up now). AT&T doesn't plan on bringing it to market until 2013:

AT&T Voice over LTE to launch in 2013

Verizon already running Voice-over-LTE trials in two cities, plans national rollout next year
 

iknownothing

Well-known member
Jun 26, 2010
64
4
0
Visit site
I'm not talking about making VoLTE calls. I'm not a network engineer but if I'm on a Verizon phone connected to lte, and I make a phone call, the phone does not drop it's connection. You are still able to use lte for data. Now, it's reasonable to assume that the upgrade paths from cdma to VoLTE would differ from gsm. It is, however, definitely an issue. Even if only to consumers who can choose whether they want the greater or the lesser functionality from their prospective carrier.

Sent from my HTC One X using Android Central Forums
 

Kevin OQuinn

AC Team Emeritus
May 17, 2010
9,267
496
0
Visit site
Could be the way the antennas in the phone function, or the chipset. Does it do the same thing on other LTE phones?

Sent from my HTC One X using Android Central Forums
 

sniffs

Well-known member
Dec 3, 2009
1,792
83
0
Visit site
OP, are you trying to say you're dropping DATA? meaning while on a phone call, you can't browse the web?
 

live4nyy

Well-known member
Sep 14, 2011
98
10
0
Visit site
I'm not talking about making VoLTE calls. I'm not a network engineer but if I'm on a Verizon phone connected to lte, and I make a phone call, the phone does not drop it's connection. You are still able to use lte for data. Now, it's reasonable to assume that the upgrade paths from cdma to VoLTE would differ from gsm. It is, however, definitely an issue. Even if only to consumers who can choose whether they want the greater or the lesser functionality from their prospective carrier.

Sent from my HTC One X using Android Central Forums

Well, I don't know exactly how Verizon is since I don't use them but from what I have read I guess because Verizon phones use two radios (one for CDMA and one for LTE) then it would seem they could handle holding an LTE signal while on a call. But on AT&T, they use a "circuit-switched fallback" with an integrated, single radio. So, since it has to drop back to HSPA(+) for phone calls then the data could not retain the LTE connection.
 
  • Like
Reactions: iknownothing

iknownothing

Well-known member
Jun 26, 2010
64
4
0
Visit site
That makes sense. Again it's not really an issue for me personally,I just wanted to make sure my phone wasn't broken. I do very much appreciate all your knowledge on the topic. You've been very helpful. Thanks again!

Sent from my HTC One X using Android Central Forums
 

Forum statistics

Threads
943,029
Messages
6,916,975
Members
3,158,791
Latest member
gaylebarts7