My D800 for some reason can not make or receive calls while on lte. For some reason when it switches from lte to 4g during call it gets hung up and just ends call. Text and sms are fine. Now, on the 3g or hspa+ everything is fine. So I been on cloudy 2.2 for the hspa+ but can't get it to stick after reboot. So my questions are, has anyone ever had this issue with making calls? The second question would be how can I make hspa+ stick after reboot it thats the route I must go?
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Just wondering if this happens to anyone else. My N5 was originally on Sprint but just recently switched to TMO. I have noticed that when on the TMO network my phone will drop to 3G whenever I make or receive a call. As soon as the call is over it switches back to LTE.
If I put my Sprint SIM back in and use their network it seems to hold LTE while on the call.
This is not scientific and am basing this observation from the network signal indicator on the top status bar. And as far as I can tell it isn't affecting performance. More of a curiosity at this point.
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this is how its supposed to work. phone calls cant go through the lte signal(in this case, with tmibile) to the phone, so it drops to 3G(H).
LTE in it's current implementation is a DATA ONLY service so when you make voice calls it drops that connection and connects the call. Since 3G is Voice/Data it shows the 3G/H connection available to you at that time. When you hang up it goes back to LTE.
With Sprint it uses CDMA so theres no simultaneous option with that so LTE is kept alive in order to deliver data at the sametime.
All expected behavior as already mentioned
Thanks for the info. Makes perfect sense how that is explained. I am rooted and cleaned out some apps I don't want. I'm particularly careful to not mess things up and noticed the change in behavior on TMO. Wanted to make sure something I hacked for Sprint didn't FUBAR the connection.
Sent from my Nexus 5 using xda app-developers app
I noticed this too on ATT.
When in calls it drops to H .
Thanks for the explanation
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It is called CSFB (circuit switched fallback), which will soon be replaced by VoLTE (Voice over LTE), which will be a plain and simple SIP-controlled VOIP call using LTE as carrier. Not sure if current phones can and/or will be upgraded to be able to do VoLTE, or if todays LTE handsets are stuck falling back forever...
Is there a bug in the SGH-T999 4.3 (UENC2) firmware relating to radio frequency switching while on a call? I am fairly certain from testing that if I am on 4G (HSPDA+. I do NOT have the LTE phone) during a call, and am driving into an area with only a strong 2G tower, that the call gets dropped instead of switching me over. I can see the radio lose all the bars and then change to a full strength 2G signal as soon as the call gets dropped. I can then immediately make a call with the 2G signal.
fdecker said:
Is there a bug in the SGH-T999 4.3 (UENC2) firmware relating to radio frequency switching while on a call? I am fairly certain from testing that if I am on 4G (HSPDA+. I do NOT have the LTE phone) during a call, and am driving into an area with only a strong 2G tower, that the call gets dropped instead of switching me over. I can see the radio lose all the bars and then change to a full strength 2G signal as soon as the call gets dropped. I can then immediately make a call with the 2G signal.
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I believe you want to go to T-Mobile Galaxy S 3 forum. This is for the T-Mobile Galaxy S 4G.
Sent from inside the time vortex
I have bought the Galaxy S6 G920F, and noticed that while I am on a phone call, I cant use the mobile data, it shows that it is connected to H+ but no data is sent or received.
My carrier is on GSM network not CDMA, on my previous phone , the LG G4 I was able to use the data network while I am in a phone call!
any suggestions or solutions?
Thats because SAMSUNG in their infinite wisdom , have removed the Dual Antenna from this model.
So you cant have Data AND voice at the same time.
Dumb as ****.
https://www.youtube.com/watch?v=PL4HTYVrgko
Works fine on my phone, I even had 4G voice a few times so it didn't drop to 3g speeds during the call meaning I could make use of 4G during a call.
I'm using my sprint note 5 on tmobile and I am using hangout dialer to make calls on 4glte but I'm not able to get incoming calls from the hangout dialer and I go down to 3g when I get calls. Is there any ways to stay on 4glte when i get incoming calls?
That 3g is really hspa do a speed test it still is fast i get 20 mbps download on 3g. when making calls i tested it out because i thought it was gonna be slow not the case
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I've near given up on my Verizon GS5 having VoLTE on T-Mobile or even Voice and Data Simultaneously, but then today, I decided to be risky, I flashed a T-Mobile ROM to my Verizon S5. It won't work they said, it'll brick they said. I was greeted with the T-Mobile boot screen and not only that, it calls, and has data. Everything works, but even more interesting, I now have Data and Voice at the same time... I'm so confused, so VoLTE isn't working because when a call starts the LTE band drops and it reverts to HSPA+(by labeling it as 4G, not 4G LTE).
I could care less about the VoLTE, why did simply changing the ROM cause the Data to stay up in a voice call. My Verizon ROM worked on the LTE band, there is no change to my radio, baseband, or anything else, I simply flashed /system.
Can anyone explain what I'm witnessing? Its clearly phone side and not carrier. Would I be better keeping the TMO ROM over my Verizon ROM anyways? Thoughts, help, comments.
I made it work in my Verizon ROM, sorry for the bother!