Using an AT&T sim on 7.0 stock ROM, can't keep LTE after a phone call. - Verizon Samsung Galaxy S6 Edge+

Hey guys! I'm running into an issue with my S6 Edge+ where if I make a phone call in a 4G area, it immediately drops to H+ after I finish the call and refuses to re-connect to 4G automatically even with wifi off. I have to go into connection settings, switch to LTE/CDMA, and swap back to LTE/CDMA/GSM. Is there a way to make it reconnect to LTE automatically after a call?

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[Q] losing 3g connection and network

Hi All,
I got the CyanogenMod 11 snapshot m12 in my HTC one x+. My 3g/lte connection automatically switches to edge and the network connection goes off but the signal strength indicator shows it as full range. I am not able to call or receive call unless I reboot or toggles to aeroplane mode. This also happens automatically when I get a call while 3g is enabled. Is this a problem with my network or something with the cyanogenmod? Is there any tool available to check if anything is wrong with my phone. ?
Thanks in advance
I am using the international version of HOX+
Tried flashing the boot.IMG? How about a LOGCAT
I have flashed the boot.img. I am getting 3g when i reboot. But some times the network automatically switches to edge and my phone goes out of the network. I dont identify it till I try to make a call because the network range icon shows full range . then I have to reboot to fix it. This problem also happens when I get a call while 3g is enabled and then it switches to edge after the call is finished. And the phone goes off the network.
sreeju1 said:
I have flashed the boot.img. I am getting 3g when i reboot. But some times the network automatically switches to edge and my phone goes out of the network. I dont identify it till I try to make a call because the network range icon shows full range . then I have to reboot to fix it. This problem also happens when I get a call while 3g is enabled and then it switches to edge after the call is finished. And the phone goes off the network.
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What is your kernel and modem version?
Kernal version is 3.1.10-g4d3cf1c
Baseband is 3.1024.171H.33

S5 Drops Signal After Connecting to WiFi

Hey guys, I have a T-Mobile branded Galaxy S5 (SM-G900T) that I'm using on Metro PCS and whenever I connect to wifi I can't receive mms messages. I will get the text and it will ask me to download the image but then I get a never ending progress bar. So then I'll turn off WiFi and I will have bars but the 4G LTE indicator will be gone and the only way to get it back is to reboot the phone. Any ideas as to what this could be? I have tried using both the T-Mobile & Metro PCS APN settings but the issue still happens no mattter which APN the phone is set to. Any help would be greatly appreciated. Thank you!
namicone said:
Hey guys, I have a T-Mobile branded Galaxy S5 (SM-G900T) that I'm using on Metro PCS and whenever I connect to wifi I can't receive mms messages. I will get the text and it will ask me to download the image but then I get a never ending progress bar. So then I'll turn off WiFi and I will have bars but the 4G LTE indicator will be gone and the only way to get it back is to reboot the phone. Any ideas as to what this could be? I have tried using both the T-Mobile & Metro PCS APN settings but the issue still happens no mattter which APN the phone is set to. Any help would be greatly appreciated. Thank you!
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What rom are you using? that would be the first question. Little more info sir....thanks
AxAtAx said:
What rom are you using? that would be the first question. Little more info sir....thanks
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No ROM, it's stock.
wifi calling enabled and set to only make calls on wifi?
This will happen when you have wifi calling enabled. That is why you see the cell signal bars go gray or grayed out. Turn off wifi calling and you will see you signal bars come back, as long as you have cell signal (service) at your house.
galaxyuser88 said:
This will happen when you have wifi calling enabled. That is why you see the cell signal bars go gray or grayed out. Turn off wifi calling and you will see you signal bars come back, as long as you have cell signal (service) at your house.
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Having WiFi calling enabled won't affect your data and messaging at all unless there is a connection issue with the router.
namicone said:
I'm using on Metro PCS and whenever I connect to wifi I can't receive mms messages. I will get the text and it will ask me to download the image but then I get a never ending progress bar.
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It sounds like a connectivity issue on the routers side if the APNs are correct. I would go back to Metro PCS APNs then check your signal strenth and link speed in the phones WiFi settings, then check to make sure WiFi calling does not display an error in the call settings. If all 3 are good then check your client list on router and make sure phones IP address and MAC id is there. If IP and MAC id are good run diag log on router and possibly change/test different wireless channels on your router.
I never have WiFi calling enabled so I don't see that as a cause, and I have tried both the MetroPCS and T-Mobile APN settings and it still happens. I'm still able to receive calls and send text messages but I can't receive MMS messages or access data. The only way to fix the issue is to turn on airplane mode for about 10 seconds and then turn it off and I get the 4GLTE signal indicator back along with full service. Its really weird because when this happens, I still have a signal indicator with 3-4 bars but the only the 4GLTE indicator disappears.
namicone said:
I never have WiFi calling enabled so I don't see that as a cause, and I have tried both the MetroPCS and T-Mobile APN settings and it still happens. I'm still able to receive calls and send text messages but I can't receive MMS messages or access data. The only way to fix the issue is to turn on airplane mode for about 10 seconds and then turn it off and I get the 4GLTE signal indicator back along with full service. Its really weird because when this happens, I still have a signal indicator with 3-4 bars but the only the 4GLTE indicator disappears.
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I will get the same issue as stated above. When you have bars present with no data icon, its because your phone is latching on to another network when MetroPCS is not to be found. At my office, T-Mobile service is the pits, yet i get bars present. I usually open the dialer and type *#0011# and it will show what band your phone is picking up, from there you can tell if you are really on MetroPCS or someone elses network.

Can't recieve calls on GSM/ WCDMA/ LTE auto.

Hi, guys!
I'd need some help with my D620(V10g).
2 days ago I've got a 4G sim, and an unlimited 4G plan, I've selected LTE only in the secret menu (in the "RAT Selection") and 4G worked just fine, but I knew I couldn't receive any call on LTE only, so I switched to GSM/ WCDMA/ LTE. However, I can make calls for about 1 hour everytime I reselect GSM/ WCDMA/ LTE.
Here comes the first problem, sometimes if I make a call, it switches to 3G (I don't know how to activate VOLTE, I don't even know if I can do that) and after I finish the call it doesn't go back to 4G, I have to restart the phone to use 4G again.
Another thing is that sometimes, If I'm connected on 4g for a long time, it simply doesn't let me make a call, it's like the phone would switch itself to LTE only.
The first problem is not that bad, it's not hard to restart the phone to make 4g work again, but the second one is full of pain... I don't want to lose calls.
I would appreciate any kind of help, thanks in advance!
After a call the phone goes back to 4G quite a long time. And everytime someone calls me phone goes directly to 3G and everything works fine. In hidden menu (*#*#4636#*#*) I have put there LTE/GSM/WCDMA and everything works just fine.

[Q] Cannot make calls on LTE

hello guys,
I have a Galaxy S4 from Verizon NK1 I just moved to Mexico and switched to a local carrier (TELCEL) I am able to use data and make calls when I am on the GSM network mode, in this mode I only get 3G data, when i switch to LTE/CDMA I am able to use 4G data and it works great, however I cannot make or receive any calls, in fact if I try to make a call i loose data connection and I have to reset my phone to get data again.
Any suggestions?

Is there any way to force 4G and also receive calls and SMS?

Hi!
Just a quick question,
I forced LTE in the service menu but found out that calls and SMS don't get through because they use 3G. The phone switches from 4G to 3g very sensitively, even though a "weak" 4G connection seems to be much faster than a strong 3G.
Is there a way to configure when the phone switches to 3G or is it possible to force 4G but still somehow get calls and messages?
I'm rooted and will try anything
Thanks

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