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4g lte situation on s4 unlocked canadian model with ATT provider

Hi guys I am requesting a little bit of help. Ihad a s4 canadian variant ,tried many custom roms but still having trouble with 4g lte. I had the correct apn's but in "about device" i reached only HSPA or HSPA+ .mY device is unlocked and I"m using ATT service.Also I tried to flash another modem but It didn't change and I don't know why. I'm running on mk6 stock one.My rom right know is a based canadian one maple leaf I had installed xposed , wanam and many other addsand I had Philz recovery instelled. Am I missing something else? WHat I did wrong or what's steps I had to do to finish my Job..?>
thank's alot for your help!!!

cjoel37 said:
Hi guys I am requesting a little bit of help. Ihad a s4 canadian variant ,tried many custom roms but still having trouble with 4g lte. I had the correct apn's but in "about device" i reached only HSPA or HSPA+ .mY device is unlocked and I"m using ATT service.Also I tried to flash another modem but It didn't change and I don't know why. I'm running on mk6 stock one.My rom right know is a based canadian one maple leaf I had installed xposed , wanam and many other addsand I had Philz recovery instelled. Am I missing something else? WHat I did wrong or what's steps I had to do to finish my Job..?>
thank's alot for your help!!!
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Make sure you have an ATT APN and the correct network mode selected, LTE/GSM/WCDMA

899289
L Chupacabra said:
Make sure you have an ATT APN and the correct network mode selected, LTE/GSM/WCDMA
I already check it and have the same problem. It don't run 4g lte.
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cjoel37 said:
L Chupacabra said:
Make sure you have an ATT APN and the correct network mode selected, LTE/GSM/WCDMA
I already check it and have the same problem. It don't run 4g lte.
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Are you sure you are in an LTE area?
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L Chupacabra said:
cjoel37 said:
Are you sure you are in an LTE area?
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Yes I have cause I had net 10 before and It worked 4g lte .I had changed because most people said that ATT is the quickest network and probably is but you have to use their own machines.they said,... I flashed original stock tar to start it fresh to see if there was some trouble when I flashe custom roms I will use triangle apk app to reset counter to 0 and start it over once I root again my machine. I will keep in contact thanks!!
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cjoel37 said:
L Chupacabra said:
Yes I have cause I had net 10 before and It worked 4g lte .I had changed because most people said that ATT is the quickest network and probably is but you have to use their own machines.they said,... I flashed original stock tar to start it fresh to see if there was some trouble when I flashe custom roms I will use triangle apk app to reset counter to 0 and start it over once I root again my machine. I will keep in contact thanks!!
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Dial:
*#*#4636#*#*
Set preferred network type to LTE/GSM
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Click to collapse

Phone can't make or receive phone calls on T-Mobile SIM but text/data is fine.

I recently got a Verizon S5 from a friend of mine to use with my T-Mobile SIM card. It had stock 4.4.4 with build NI2 so I rooted using the NCG stock and towelroot before flashing back to NI2. Everything worked as expected and I was able to make calls and whatnot.
Now I decide I want CM 12.1 on my phone and begin the process of getting BusyBox and SafeStrap installed. Again all is going according to plan including the backup of stock ROM.
I wipe and flash CM 12.1 and get into a boot loop, so immediately I wipe again and restore to my previous backup.
Now I can send/receive texts, MMS, and my LTE works fine; but I can't make calls.
I've gone through all the steps to enable T-Mobile LTE through the CA Settings and manually enabling Band 4, and don't think this is related, but it might be.
I've reset multiple times, tried flashing CM 12.1 multiple times, and now I'm back on stock Touchwiz and am ready to shoot someone.
Specs:
SM-G900V
Version 4.4.4
Baseband is NI2
Kernel is 3.4.0
Build is NI2
Please help!

sl0anage said:
I recently got a Verizon S5 from a friend of mine to use with my T-Mobile SIM card. It had stock 4.4.4 with build NI2 so I rooted using the NCG stock and towelroot before flashing back to NI2. Everything worked as expected and I was able to make calls and whatnot.
Now I decide I want CM 12.1 on my phone and begin the process of getting BusyBox and SafeStrap installed. Again all is going according to plan including the backup of stock ROM.
I wipe and flash CM 12.1 and get into a boot loop, so immediately I wipe again and restore to my previous backup.
Now I can send/receive texts, MMS, and my LTE works fine; but I can't make calls.
I've gone through all the steps to enable T-Mobile LTE through the CA Settings and manually enabling Band 4, and don't think this is related, but it might be.
I've reset multiple times, tried flashing CM 12.1 multiple times, and now I'm back on stock Touchwiz and am ready to shoot someone.
Specs:
SM-G900V
Version 4.4.4
Baseband is NI2
Kernel is 3.4.0
Build is NI2
Please help!
Click to expand...
Click to collapse
You can only run TW Roms. You have a locked boot loader.

Noted, but why can't I send or receive calls on stock? Any ideas?
Sent from my SM-G900V using XDA Free mobile app

sl0anage said:
Noted, but why can't I send or receive calls on stock? Any ideas?
Sent from my SM-G900V using XDA Free mobile app
Click to expand...
Click to collapse
You might try flashing the NI2 kernel and if that doesn't work, the NI2 firmware.

So I just got a pop-up wanting to know if I would enable global mode. It had a dialer app icon but it appeared while I was in the messenger app. I said okay and now calls work. The only place I can find global network settings is in the network settings, so if anyone finds this with the same error, try re-enabling global network mode.
Sent from my SM-G900V using XDA Free mobile app

Verizon uses CDMA technology. T-Mobile uses GSM. All non-USA part of world is GSM, so maybe phone has both so that it can be used outside USA, but you have to enable Global to enable GSM. (Verizon, Sprint, and one other USA carrier are the only ones in the world to use CDMA.)

hey just a tip. it has nothing to do with your problem (well maybe it does) and sorry if you already knew but i was very happy when i found out. T-mobile roms work on these phones. I use Alliance 4.4.2 rom from the sgs5 t-mo section. Flashed with safe strap and it works great. I was having major issues when using the VZW roms. Like phone wanting to dial *86 for my voicemail then hanging up my phone call, or getting the 1x symbol constantly while in a call or just after calls ect. Now all i need to do is figure out how to put T-mo 5.0 roms on this thing....mehhh... i'm sure there's a step by step somewhere I just cant find it. Hope this helps if not I'll edit and put a thanks or thumbs up or something.

Can we install a t-mobile rom (900T) and flash the radio specific to 900V back so that t-mobile wifi-calling works? Can someone answer if they have done this?
Also will the band 12 on this work with t-mobile's new 700MhZ?
Thanks.

bartio1975 said:
Can we install a t-mobile rom (900T) and flash the radio specific to 900V back so that t-mobile wifi-calling works? Can someone answer if they have done this?
Also will the band 12 on this work with t-mobile's new 700MhZ?
Thanks.
Click to expand...
Click to collapse
It works fine i used the alliance rom but you dont need to flash the modem file, even the wifi calling is working but since t mo recognizes it HSPA+ as 4g but when you connect to an actual 4g it will say 4g lte but you cant connect to t mo 700 mhz as it doesnt support that frequenc
---------- Post added at 03:32 AM ---------- Previous post was at 03:26 AM ----------
I am using am gs5 verizon on a gsm network with lte band 3 and i never had problems with calling, i suggest you look for an app called Advanced Signal Status though you will need root so that you can change between network types

MuminMohamed said:
It works fine i used the alliance rom but you dont need to flash the modem file, even the wifi calling is working but since t mo recognizes it HSPA+ as 4g but when you connect to an actual 4g it will say 4g lte but you cant connect to t mo 700 mhz as it doesnt support that frequenc
---------- Post added at 03:32 AM ---------- Previous post was at 03:26 AM ----------
I am using am gs5 verizon on a gsm network with lte band 3 and i never had problems with calling, i suggest you look for an app called Advanced Signal Status though you will need root so that you can change between network types
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How did you get wifi calling to work? Mine just says enabling but never does.

wrecless said:
How did you get wifi calling to work? Mine just says enabling but never does.
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I used alliance rom from the t mo section though i used it for a day before coming back home as of now i cant tell as i am in Kenya

Best way to udpate PRL with CM 10.2.1

I am running an old CM 10.2.1 rom and need to update my phone's PRL. I may plan a trip to Canada and need to make sure my phone will work. Though my ROM is old, what is the procedure for updating PRL?

Make a backup of your custom ROM then flash a TW based ROM. Update your prl then restore your CM ROM.

Beezer80 said:
Make a backup of your custom ROM then flash a TW based ROM. Update your prl then restore your CM ROM.
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Once abroad , what mode do I need to put my phone in for international service? Do I use the "system select mode" under mobile networks, change to auto International roaming?

jp0213x said:
Once abroad , what mode do I need to put my phone in for international service? Do I use the "system select mode" under mobile networks, change to auto International roaming?
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That sounds correct. Preferred Network Type = Global

Beezer80 said:
That sounds correct. Preferred Network Type = Global
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Click to collapse
Thanks

jp0213x said:
Thanks
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Click to collapse
Update,
Was in Canada over the weekend and found out this ROM doesn't work at all for international roaming. Signal on the phone was very poor and the phone couldn't access the web. I did update the PRL before leaving. I had to restore my phone back to stock in order to use. Anyone have any luck using a custom that works well international roaming?

jp0213x said:
Update,
Was in Canada over the weekend and found out this ROM doesn't work at all for international roaming. Signal on the phone was very poor and the phone couldn't access the web. I did update the PRL before leaving. I had to restore my phone back to stock in order to use. Anyone have any luck using a custom that works well international roaming?
Click to expand...
Click to collapse
PRLs won't do anything for international roaming unless your phone supports the bands those carriers use

I have an s4 and it roamed fine on Rogers network under my stock firmware. Didn't work well with the custom rom.

jp0213x said:
I have an s4 and it roamed fine on Rogers network under my stock firmware. Didn't work well with the custom rom.
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Weird, if you're on stock, then update PRL, and then flash custom ROM it should carry over

mattzeller said:
Weird, if you're on stock, then update PRL, and then flash custom ROM it should carry over
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Click to collapse
Signal was non existent few calls came through just about it. No web access.

jp0213x said:
Signal was non existent few calls came through just about it. No web access.
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Click to collapse
Maybe an APN issue

Lost LTE after flashing a ROM

I lost LTE after I flashed Ressurection Remix. I wiped after I flashed Ressurection due to the ROM constantly dropping service randomly. I had LTE perfectly fine with that ROM though. So afterwards, I tried Omni Rom and that's when I started only getting 3G and absolutely no LTE, no matter what ROM I flashed. I flashed the stock ROM, including flashing the stock modem and wiping modemst1 and t2, and still have no LTE, even on the stock ROM. Is there anything I can do? I'm fully rooted with TWRP, and have not had any errors upon flashing. I don't know what would have caused this.

cotylee1991 said:
I lost LTE after I flashed Ressurection Remix...I flashed the stock ROM, including flashing the stock modem and wiping modemst1 and t2, and still have no LTE, even on the stock ROM. Is there anything I can do? I'm fully rooted with TWRP, and have not had any errors upon flashing. I don't know what would have caused this.
Click to expand...
Click to collapse
I think you have to re-create the APN settings that your carrier requires for mobile data. It's possible that RR has APNs built in for various carriers and if that's the case, find the one for your carrier and make it the default. This is what I had to do when I flashed LineageOS and also after I re-flashed the stock ROM.

lmacmil said:
I think you have to re-create the APN settings that your carrier requires for mobile data. It's possible that RR has APNs built in for various carriers and if that's the case, find the one for your carrier and make it the default. This is what I had to do when I flashed LineageOS and also after I re-flashed the stock ROM.
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Click to collapse
That's what I did, and even flashed back the original ROM and all I'm getting is H+ data now. Absolutely no LTE. Something had to have went wrong to cause the radio in the phone to stop picking up LTE.

UPDATE: I found out that it was the kernel that caused me to lose LTE. I flashed a different kernel and it brought back LTE.

cotylee1991 said:
UPDATE: I found out that it was the kernel that caused me to lose LTE. I flashed a different kernel and it brought back LTE.
Click to expand...
Click to collapse
Can you link what kernel worked for you. I'm having the same issues with LTE trying to use it on Verizon. I can get 4G to work if I change the radio to United States but then phone calls don't work. If I get it so that phone calls do work then the signal drops out all the time and 3g is only available.
Thanks.

fictitiousexistence said:
Can you link what kernel worked for you. I'm having the same issues with LTE trying to use it on Verizon. I can get 4G to work if I change the radio to United States but then phone calls don't work. If I get it so that phone calls do work then the signal drops out all the time and 3g is only available.
Thanks.
Click to expand...
Click to collapse
Certainly!
https://forum.xda-developers.com/mo...ernel-vegito-kernel-1-0-13-september-t3461021
Keep in mind, we can use G4 plus kernels and ROMs too, even if were on the regular G4.
ElementalX kernel may also work if that one doesn't work out for you.
Download according to your current ROM (nougat, marshmallow, etc), reboot to recovery, install zip that you downloaded, wipe cache, reboot, done. Turn off WiFi before rebooting to recovery, that way when you reboot after flashing the kernel it will go straight for mobile network instead of WiFi (;
Let me know if it works for you too!

cotylee1991 said:
Certainly!
https://forum.xda-developers.com/mo...ernel-vegito-kernel-1-0-13-september-t3461021
Keep in mind, we can use G4 plus kernels and ROMs too, even if were on the regular G4.
ElementalX kernel may also work if that one doesn't work out for you.
Download according to your current ROM (nougat, marshmallow, etc), reboot to recovery, install zip that you downloaded, wipe cache, reboot, done. Turn off WiFi before rebooting to recovery, that way when you reboot after flashing the kernel it will go straight for mobile network instead of WiFi (;
Let me know if it works for you too!
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Click to collapse
Thanks for the reply!
I was excited, but it did not work for me. Still only getting 3G. Its weird because it constantly says I lost signal cause I went outside my home area. There should be perfect Verizon coverage here.
But when I set the radio band to United States( which I am in) the 4G works perfectly but then the network for calling/SMS is gone.
When the 4g works, the apns all change and then when I set the radio band back to automatic they change again but to something that has no 4G.
I also have no option to edit or add any APNs.

fictitiousexistence said:
Thanks for the reply!
I was excited, but it did not work for me. Still only getting 3G. Its weird because it constantly says I lost signal cause I went outside my home area. There should be perfect Verizon coverage here.
But when I set the radio band to United States( which I am in) the 4G works perfectly but then the network for calling/SMS is gone.
When the 4g works, the apns all change and then when I set the radio band back to automatic they change again but to something that has no 4G.
I also have no option to edit or add any APNs.
Click to expand...
Click to collapse
You know what's weird is I used to use Total Wireless which is on the Verizon network in my G4, and towards the end I was only getting 3G as well.
Which ROM are you currently on if you don't mind me asking?

cotylee1991 said:
You know what's weird is I used to use Total Wireless which is on the Verizon network in my G4, and towards the end I was only getting 3G as well.
Which ROM are you currently on if you don't mind me asking?
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Its not that personal of a question lol I don't mind at all. I am using Resurrection Remix. And the kernel that you mentioned. The sim came from my work phone which was a Galaxy S5 Verizon.
So does the G4 work on cmda AND gsm? I thought you had to get an unlocked version of one or the other?
I think the guy I bought the phone from said he was using it on TMobile.
He mentioned that the moto g4 had sim issues when it first came out but this one was a new one Motorola sent back to him.

Maybe this will help you out, I had LTE issues right out of the box on mine and fixed it with this:
https://forum.xda-developers.com/moto-g4-plus/help/lte-issues-suggestions-flash-radio-modem-t3672456

natenkiki2004 said:
Maybe this will help you out, I had LTE issues right out of the box on mine and fixed it with this:
https://forum.xda-developers.com/moto-g4-plus/help/lte-issues-suggestions-flash-radio-modem-t3672456
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Click to collapse
I downloaded the rom and extracted the zip file. I'm not seeing where the NON-HLOS.bin and fsg.mbn files are?
Thanks.
Nevermind. Think I downloaded the wrong file.

Calling isn't working?

Every Rom I tried on my GALAXY S4, lately my calling hasn't worked at all on any of the Roms, I would open the phone app trying to call Voicemail and nothing happens, it doesn't ring or nothing just a long pause and a single beep?. I tried finding ways online how to fix it but so far no luck :-/, has anyone found a solution to fix it? Because Im actually so lost on what to do about it right now.

This happens when running the latest stock ROM? Phone shows the correct IMEI from the dialler?

audit13 said:
This happens when running the latest stock ROM? Phone shows the correct IMEI from the dialler?
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Yeah like my texting and data works fine it's just the calling that doesn't work, and I'm just like lost now and ran out of ideas, like when I go in the settings and go under phone info and it shows I'm connected to mobile network and IMEI info is still the same from stock ROM.

I'm stumped. The sim is working since text and data work.
Is the phone being used with the carrier that issued the phone or was the phone purchased outright and unlocked?

audit13 said:
I'm stumped. The sim is working since text and data work.
Is the phone being used with the carrier that issued the phone or was the phone purchased outright and unlocked?
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Click to collapse
It was originally by telus Canada variant, but recently in Canada they made it free to get your phone unlocked under certain conditions, so I called telus and they unlocked it for me to be world wide, because my phone is actually so simaler to the US and European variant, on how they are built so I Flashed TWRP GT-i9505 on it and now so now I'm running XOSP-UNOFFICAL-20180114-JFLTEXX and everything works except calling, right now that's how I'm responding to this thread is by mobile data.

Yes, the sgh-337m (Canadian variant) and GT-i9505 are very similar but the radio bands supported by each model is different. Maybe certain radio bands need to be unlocked or enabled for voice?
You could try this website to check compatibility with a stock i337m ROM: https://willmyphonework.net/
Edit: I just noticed you are in Vancouver. Which carrier is being used with the phone?

audit13 said:
Yes, the sgh-337m (Canadian variant) and GT-i9505 are very similar but the radio bands supported by each model is different. Maybe certain radio bands need to be unlocked or enabled for voice?
You could try this website to check compatibility with a stock i337m ROM: https://willmyphonework.net/
Edit: I just noticed you are in Vancouver. Which carrier is being used with the phone?
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Click to collapse
I am using Freedom mobile is my current service provider, not the biggest company but they are growing. OK I'll look at that link

Did you modify the radio bands to enable AWS for Freedom? I know they are expanding their LTE network to bring LTE to phones that previously worked on 3g only like the iPhone 6s a1688.

Modify Bands? May you describe what that is and how? Because I didn't modify anything all I did one day was Flashed stock ROM via Odin from SamMobile and ever since them my IMEI hanged or anything

Freedom frequencies aren't supported by the i337m. The freedom version of the s4 is the sgh-m919v.
https://forum.xda-developers.com/showthread.php?t=2291589

audit13 said:
Freedom frequencies aren't supported by the i337m. The freedom version of the s4 is the sgh-m919v.
https://forum.xda-developers.com/showthread.php?t=2291589
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What how is that possible I get mobile data and texting though? Because even In Stock ROM I'm able to call as well?

So your talking about Sgh-i337m right?

Just want to confirm that calling with a stock rom on freedom doesn't work but data and text does? If yes, that is strange that calling doesn't work.
Does calling work with another carrier?

audit13 said:
Just want to confirm that calling with a stock rom on freedom doesn't work but data and text does? If yes, that is strange that calling doesn't work.
Does calling work with another carrier?
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No I mean when I ran Lollipop from SamMobile calling worked 100% same with texting and data, but calling doesn't work running custom Rom, it works for texting and Data but not calling.

That is strange. The custom ROMs are made for the jflte?

audit13 said:
That is strange. The custom ROMs are made for the jflte?
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This is a screenshot of my device info and Rom and no its for the gfltexx

I just noticed now but in the screenshot of "mobile network state" that it says "disconnected" now I'm confused. About my phone is GT-I337M is the original model name.

I think it may be a kernel issue. Is the phone running the kernel included with the rom?

I never actually knew the differences were between a Rom and a kernel? For a while ithought they were the same, hold on I'll take a screenshot of it.

audit13 said:
I think it may be a kernel issue. Is the phone running the kernel included with the rom?
Click to expand...
Click to collapse
This is what it is.