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[Q] Odd LTE Signal Swap Issues

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A|ex
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Default [Q] Odd LTE Signal Swap Issues

I seem to be having the strangest LTE / 4G signal issues with the S4. I get 4G fine but when i leave a 4G area it drops to H+ or if the signal on 4G is weak it drops to H / H+ during this transition i am left without any signal for seconds to minutes as it switches.

Is there any way to find out what my LTE modem version is as i know my GSM one?

I am not too sure if this switch is normal to be lost without signal as GSM > H > H+ works fine and i still have signal
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Originally Posted by A|ex View Post
I seem to be having the strangest LTE / 4G signal issues with the S4. I get 4G fine but when i leave a 4G area it drops to H+ or if the signal on 4G is weak it drops to H / H+ during this transition i am left without any signal for seconds to minutes as it switches.

Is there any way to find out what my LTE modem version is as i know my GSM one?

I am not too sure if this switch is normal to be lost without signal as GSM > H > H+ works fine and i still have signal
Check your baseband version and try to flash through ODIN the right one for your location

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Originally Posted by asbanoglou View Post
Check your baseband version and try to flash through ODIN the right one for your location
how do i do this? i can only see GSM modem not LTE. i know both versions maybe different
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Mate the baseband of your phone is the same for both the gsm and lte configurations of your phone. If that won't work you can still check your carriers vpn configurations to see if there are correct

Sent from my GT-I9505 using XDA Premium 4 mobile app

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i just searched forums :
http://forum.xda-developers.com/show....php?t=2525084

respider posted this:

**If you are having the old bootloader XXUB flash GSM_Modem_XXUEMJ5_and_LTE_Modem_XXUBMH1.tar file with odin by selecting phone.
**If you are having the new bootloader XXUD flash GSM_Modem_XXUEMJ5_and_LTE_Modem_XXUEMJ5.tar file with odin by selecting phone.

So this means that even if it says the LTE modem is different to the GSM modem you are saying that the help about the modem for GSM and LTE is in fact the same?
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Originally Posted by asbanoglou View Post
Mate the baseband of your phone is the same for both the gsm and lte configurations of your phone. If that won't work you can still check your carriers vpn configurations to see if there are correct

Sent from my GT-I9505 using XDA Premium 4 mobile app
are you still able to help?
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are you still able to help?
From my knowledge you cant flash anything you like.You need to flash the correct modem for your region.Whats the version of your bootloader and your country so i can link you the correct file

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I am experiencing the same thing, the switch from H+ to 4G doesn't drop the actual signal from the network whereas from 4G to H+ the signal drops leaving me no service at all for a few seconds.

I am starting to think that this is the normal behavior because it's like this since I got the S4. Oh and I have the latest modem for my country as well if that helps.

Perhaps someone with knowledge on how the modem works can chime in?

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Originally Posted by chickentuna View Post
I am experiencing the same thing, the switch from H+ to 4G doesn't drop the actual signal from the network whereas from 4G to H+ the signal drops leaving me no service at all for a few seconds.

I am starting to think that this is the normal behavior because it's like this since I got the S4. Oh and I have the latest modem for my country as well if that helps.

Perhaps someone with knowledge on how the modem works can chime in?

Sent from my GT-I9505 using Tapatalk
Thanks chickentuna for your reply

Ok the 4G works perfectly fine in Hong Kong, London but as soon as i leave london and go to areas with 4G but low signal, i get the horrible loss of network until the phone does a search. I think its more network / phone related but would just need to learn to disable 4G out of the main cities.

asbanoglou thanks for trying you can flash any modem but whether or not it will work is another matter. I understand bootloader, different modems and csc i am looking for something a little more non generic. I first assumed this was the firmware / modem combo but after trying multiple ones this does not seem to be the case unless there is a long standing issue with the S4 and LTE.

As a future note to get the modem versions you dial *#1234# . More > About does not give you the full picture but thanks for those who tried to help
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