S4 i9500 no network bars - Galaxy S 4 Q&A, Help & Troubleshooting

Hi, I have my friends s4, he has Android 5 offical samsung rom, he installed it by him self, then he switched back to to 4.4.4 and network bars not showing, i guess it needs a new modem to be flashed, can you guys give me a link?

http://forum.xda-developers.com/galaxy-s4/general/i9500-easy-to-downgrade-official-t3036258

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[Q] need help with s4 sprint

hi guys have a nice day
i have a sprint s4 4.2 and after unlocking it for international use the device by downgrading the modem from MF9 to MDC
and after complete unlocking i put my gsm simcard on it ( not US simcard)
the signal is very very week inside my house and mostly without any signal . or it just return full signal after while but then directly get down until disappear .
today i flash back the MF9 modem back to see if is there any different.
but actually it is the same thing
and i have 2 other phone samsung galaxy s2 and galaxy ace all of them has good signal except my s4 sprint
please help me with this problem

[Q] Bad Wifi signal after Update to XXUGNGU2, any solutions?

Hey guys,
I recieved a Galaxy S4 a few days ago and updated it to the new XXUGNGU2 after a Softwareupdate window showed up. The problem now is that i have a very bad Wifi signal. With my old S2 i got 4 bars at the same place with my S4 only 1 and the Internet is veeeeeeeeeeeeery slow. I already reflashed the Modem with Odin but nothing has changed.
The phone is not rooted and on Stock rom. I already tried to change things in my modem or to turn off Powersavemode for Wifi. Factoryreset hasn't changed something, too. Mobile Signal is very good and better than my old S2 so it must be a Softwarething. What can I do?
Greetz

Sprint galaxy S4 SPL-L720 on T- Mobile Rom Question

I have a rooted and unlocked Sprint galaxy S4 SPL-L720 on T-Mobile with current touchWiz Build # KOT49HL720VPUFNG2 Baseband L720VPUAMDC. Can anyone recommend a custom rom? I can't get the Data to work right doesn't even show 2G so data is real slow. MMS doesn't work at all no matter what T-Mobile APN I use.
WiFi and phone is only thing good. I rooted and unlocked running current firmware I got from a contributor. 1 1/2 years ago. Hope I can get some help here. Thanks
Help with updating PRL on Sprint Galaxy S4. Have twrp and cyanogenmod . Trying to activate my backup phone to use on sprint. my phone is not connecting due to needing to update the PRL. How do you do this when you are running cyanogenmod? Please help.

Low wifi signal

Hello
Recently got a refurbished S4. Actually i can't know the exact model.
In download mode. It says it is the L720T model (sprint). But i can't instally any sprint rom.
I could install int i9505 roms (jfltexx). I tried updating lollipop modem & bootloader but i could only install Sprint modem (Updated from L720VPUGOH1 to L720VPUGOK3)
But the real problem is that I got very poor wifi signal. When near the router,it works. As soon as you walk bit away ,the signal drops significantly.
I'm still wondering wether it's a hardware or software issue. And i'm not sure about which version i got if i wanted to flash stock firmware. How can resolve this ?

No LTE signal in cm12.1 and cm13

Dear Friends,
I recently purchased a galaxy note 3 SM n9005 32 GB qualcom LTE. It come with a lollipop touchwiz rom, in that time i am able to receive LTE signals. After i flashed CM12.1 then I am unable to get LTE signals. I searched a lot in google and xda but I am unable to find a valid solution. I don't what is my firmware and baseband version when I have stock lollipop rom. I tried *#*#4636#*#* and select LTE mode only. After change this when I searching for network mannually i am not able to connect any network. after changint to WCDMA mode only i am able to receive the H+ signal only. In CM13 also the same issue is present. Please anyone know how to solve this issue, can help me. I have no Backup of stock rom. My current CM12 firmware details as per attachments.
In the droid info app it shows baseband version N900PVPUEOC5. When i google with this baseband version number it showing sprint galaxy note 3. Now I am really confusing that whether I have International N9005 or Sprint galaxy Note 3. I am expecting help from experts.
neokragu said:
Dear Friends,
I recently purchased a galaxy note 3 SM n9005 32 GB qualcom LTE. It come with a lollipop touchwiz rom, in that time i am able to receive LTE signals. After i flashed CM12.1 then I am unable to get LTE signals. I searched a lot in google and xda but I am unable to find a valid solution. I don't what is my firmware and baseband version when I have stock lollipop rom. I tried *#*#4636#*#* and select LTE mode only. After change this when I searching for network mannually i am not able to connect any network. after changint to WCDMA mode only i am able to receive the H+ signal only. In CM13 also the same issue is present. Please anyone know how to solve this issue, can help me. I have no Backup of stock rom. My current CM12 firmware details as per attachments.
In the droid info app it shows baseband version N900PVPUEOC5. When i google with this baseband version number it showing sprint galaxy note 3. Now I am really confusing that whether I have International N9005 or Sprint galaxy Note 3. I am expecting help from experts.
Click to expand...
Click to collapse
what does your twrp version says?
if it is hltespr then you have sprint note 3
n900p is sprint.
still waiting for the solution

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