S4 no signal...Help? - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

I finally got around to unboxing my S4 and foolishly took the update to 4.3 last month. I managed to root and install TWRP,
then sat it for a month till the battery arrived (Zerolemon 7500).
Okay, i loaded both Hyperdrive RLS15 and ShoStock..... phone operates fine, but when I insert my SIM,
it does know it's rogers, but NO SIGNAL.
Modem issue? I'm frustrated.........back on my S3 now.........
HELP??
Thanks Guys

If Odin the stock firmware. I believe you can get it at sammobile.com for the i337m which you appear to have. If you still have problems it's probably hardware related.
Also, make sure your apn is correct for Rogers
Sent from my Nexus 5

It is likely your apn settings, there is also a 4.4.2 modem available for i337m in one of the threads

Gage_Hero said:
It is likely your apn settings, there is also a 4.4.2 modem available for i337m in one of the threads
Click to expand...
Click to collapse
How do I set APN?? I've been in the Mobile Network menus, but there isn't an option to choose Rogers.
Frustrated!!! And I can't find find the modem............

dssking said:
How do I set APN?? I've been in the Mobile Network menus, but there isn't an option to choose Rogers.
Frustrated!!! And I can't find find the modem............
Click to expand...
Click to collapse
Google Roger apn settings. Check those against what you already have. You might have to create a new apn or edit what you have
Sent from my Nexus 5

dssking said:
How do I set APN?? I've been in the Mobile Network menus, but there isn't an option to choose Rogers.
Frustrated!!! And I can't find find the modem............
Click to expand...
Click to collapse
To add to it, I even went back to the stock 4.3 after I rooted and I have no connectivity........MODEM?

dssking said:
To add to it, I even went back to the stock 4.3 after I rooted and I have no connectivity........MODEM?
Click to expand...
Click to collapse
I had a random thing happen once like that, sound strange but power off the phone, take out the sim, wipe it down, rubbing alcohol works good, make sure it is dry then fire up the phone again....

Related

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!!!
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
Are you sure you are in an LTE area?
Click to expand...
Click to collapse
L Chupacabra said:
cjoel37 said:
Are you sure you are in an LTE area?
Click to expand...
Click to collapse
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!!
Click to expand...
Click to collapse
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!!
Click to expand...
Click to collapse
Dial:
*#*#4636#*#*
Set preferred network type to LTE/GSM
Click to expand...
Click to collapse

AT&T Galaxy S4 boot loader help

Trying to switch my Galaxy s4 (at&t) to straight talk service. I love downgraded to mk2 and rooted /
Super User as well as Safe Strap. I'm on mk2 now and just got my wifi working. I don't know how to unlock the boot loader or what but it's in the stock slot. I messed up the default but I just want to be able to switch to straight talk.
TNKid said:
Trying to switch my Galaxy s4 (at&t) to straight talk service. I love downgraded to mk2 and rooted /
Super User as well as Safe Strap. I'm on mk2 now and just got my wifi working. I don't know how to unlock the boot loader or what but it's in the stock slot. I messed up the default but I just want to be able to switch to straight talk.
Click to expand...
Click to collapse
MK2 owner can't unlock bootloader for now
TNKid said:
Trying to switch my Galaxy s4 (at&t) to straight talk service. I love downgraded to mk2 and rooted /
Super User as well as Safe Strap. I'm on mk2 now and just got my wifi working. I don't know how to unlock the boot loader or what but it's in the stock slot. I messed up the default but I just want to be able to switch to straight talk.
Click to expand...
Click to collapse
Are you trying to sim unlock? If so you could try this http://forum.xda-developers.com/showthread.php?p=49068262
Sent from my Nexus 5 using XDA Free mobile app
I'm trying to make straight talk from an at&t phone. I don't care about the rom. I have the byob sim card do I still need to do the sim unlock?
jd1639 said:
Are you trying to sim unlock? If so you could try this http://forum.xda-developers.com/showthread.php?p=49068262
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
TNKid said:
I'm trying to make straight talk from an at&t phone. I don't care about the rom. I have the byob sim card do I still need to do the sim unlock?
Click to expand...
Click to collapse
You should only have to change your APN settings
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
How would I know if my boot loader is unlocked though, doesn't it have to be?
TNKid said:
How would I know if my boot loader is unlocked though, doesn't it have to be?
Click to expand...
Click to collapse
I can tell you for sure your boot loader is not unlocked. You can't unlock it on the i337. But it doesn't have to be to change the apn
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
jd1639 said:
I can tell you for sure your boot loader is not unlocked. You can't unlock it on the i337. But it doesn't have to be to change the apn
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
Click to expand...
Click to collapse
Ok trying to sim unlock now. Will let ya know how it goes
TNKid said:
Ok trying to sim unlock now. Will let ya know how it goes
Click to expand...
Click to collapse
You probably don't have to sim unlock. Straight talk is part of att isn't it?
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
jd1639 said:
You probably don't have to sim unlock. Straight talk is part of att isn't it?
Sent from my SAMSUNG-SGH-I727 using XDA Free mobile app
Click to expand...
Click to collapse
It was a contract phone so I dunno. I got the apn setting e-mailed to me by straight talk, I dunno? I think its the modem but i'm not sure which one excatly I need.
TNKid said:
It was a contract phone so I dunno. I got the apn setting e-mailed to me by straight talk, I dunno? I think its the modem but i'm not sure which one excatly I need.
Click to expand...
Click to collapse
I have the regional app and root with safe strap 3.71. I used terminal emulator and check which modem I needed and it says nb1 so I tried that and nothing different. what am I not doing or doing wrong.
TNKid said:
I have the regional app and root with safe strap 3.71. I used terminal emulator and check which modem I needed and it says nb1 so I tried that and nothing different. what am I not doing or doing wrong.
Click to expand...
Click to collapse
ok, so you're rooted and on nb1....
go to settings/ connections/ more networks/ mobile networks/ apn
click the "+" in the upper right corner
and add the settings they sent you
see if that works.
rickxx2000 said:
ok, so you're rooted and on nb1....
go to settings/ connections/ more networks/ mobile networks/ apn
click the "+" in the upper right corner
and add the settings they sent you
see if that it works.
well i have and I tried flashing the MF3 modem and it still tells me I have no mobile networks or whatever. I'm on a att straight talk sin card as well. My system is nb1 rooted to mk2 I thought I had to down grade for root so that's what indid. If I take this update I will lose root if I go back to 4.4.2 won't I
Click to expand...
Click to collapse
rickxx2000 said:
ok, so you're rooted and on nb1....
go to settings/ connections/ more networks/ mobile networks/ apn
click the "+" in the upper right corner
and add the settings they sent you
see if that works.
Click to expand...
Click to collapse
Also: I have tried numerous APNs and none worked. I seen a post that said something about flashing a modem or something using Loki but I lost the page. Maybe I missed a step?
TNKid said:
Also: I have tried numerous APNs and none worked. I seen a post that said something about flashing a modem or something using Loki but I lost the page. Maybe I missed a step?
Click to expand...
Click to collapse
can I use an nb1 modem if i;m using a mk2 rom?
TNKid said:
can I use an nb1 modem if i;m using a mk2 rom?
Click to expand...
Click to collapse
i believe you can. there's a straight talk thread in the general section http://forum.xda-developers.com/showthread.php?t=2273527
you may want to post your question there. sorry i couldn't be more help
rickxx2000 said:
i believe you can. there's a straight talk thread in the general section http://forum.xda-developers.com/showthread.php?t=2273527
you may want to post your question there. sorry i couldn't be more help
Click to expand...
Click to collapse
Ended up switching to a t mobile sim card. I figured since it's a att phone to use the att sim card.. but I tried the t mobile and getting some service but very little. ST is telling me a tower near me is down to give it 24 hours but I feel that's a goose chase lol I've used a t mobile sim card in the exact spot I'm in and worked fine. It was in the note 2 from Verizon fully unlocked though.
TNKid said:
Ended up switching to a t mobile sim card. I figured since it's a att phone to use the att sim card.. but I tried the t mobile and getting some service but very little. ST is telling me a tower near me is down to give it 24 hours but I feel that's a goose chase lol I've used a t mobile sim card in the exact spot I'm in and worked fine. It was in the note 2 from Verizon fully unlocked though.
Click to expand...
Click to collapse
I have a at&t locked s4 on straightalk now. No need to root unlock or anything just the at&t compatible sim from them and adjust apns. I can't advise on the tmobile base for st since there coverage is horrid in my area but if you do use the at&t the apn I use for my s4 and my gf s4 is as follows
apn:tfdata
port:80
mmsc:http://mms-tf.net
mm proxy:mms2.tracfone.com
mm port:80
anything not listed above was left as either not set or whatever the default was when creating a new apn. I have no issues with data or mms using this apn on either phone. Hope that helps
drivers1492 said:
I have a at&t locked s4 on straightalk now. No need to root unlock or anything just the at&t compatible sim from them and adjust apns. I can't advise on the tmobile base for st since there coverage is horrid in my area but if you do use the at&t the apn I use for my s4 and my gf s4 is as follows
apn:tfdata
port:80
mmsc:http://mms-tf.net
mm proxy:mms2.tracfone.com
mm port:80
anything not listed above was left as either not set or whatever the default was when creating a new apn. I have no issues with data or mms using this apn on either phone. Hope that helps
Click to expand...
Click to collapse
Well they told me a tower was down for t mobile yesterday and they said 24 hours and it's still not hardly working. I can only use my gs4 on my couch with my hand near the window. About to call them and get I in their butt. It's not my phone is the apn settings or something on the ST end. Will update after this long as call
Unless I am mistaken the apn has zero to do with reception. Apn's are for your mms/data access. I have never come across a phone where the apn had any effect on the actual cellular signal.

Can't call from Costa Rica with GOLDENFINGER rom

Hi everybody
Yesterday installed a new version of http://forum.xda-developers.com/galaxy-s4-att/development/movin-please-posts-t2864506
I do all the movements and a correct installation; but when I try to make a call a message saying "No registered" or like "no service" appears. This happens in all the iB4STiD new version of roms in every Kernels.
The carrier is "CLARO" and the kind of band is UMTS or HSPA+
Please help!
kevinlopz said:
Hi everybody
Yesterday installed a new version of http://forum.xda-developers.com/galaxy-s4-att/development/movin-please-posts-t2864506
I do all the movements and a correct installation; but when I try to make a call a message saying "No registered" or like "no service" appears. This happens in all the iB4STiD new version of roms in every Kernels.
The carrier is "CLARO" and the kind of band is UMTS or HSPA+
Please help!
Click to expand...
Click to collapse
Did you configure the APN settings for your carrier? If not, you can find the menu in...
Settings > Wireless and Networks > More Settings > Mobile Networks > Access Point Names
I am on ATT, so I cannot verify if these work, but I did find these...
http://forum.xda-developers.com/showthread.php?t=2229220
guut13 said:
Did you configure the APN settings for your carrier? If not, you can find the menu in...
Settings > Wireless and Networks > More Settings > Mobile Networks > Access Point Names
I am on ATT, so I cannot verify if these work, but I did find these...
http://forum.xda-developers.com/showthread.php?t=2229220
Click to expand...
Click to collapse
Thanks for reply! The problem isn't in the apn or internet conection... Is in all the carrier registration, that means can't call or send sms.
Sometimes the 4G symbol appears and I can navigate in internet but don't allow me to call.
kevinlopz said:
Thanks for reply! The problem isn't in the apn or internet conection... Is in all the carrier registration, that means can't call or send sms.
Sometimes the 4G symbol appears and I can navigate in internet but don't allow me to call.
Click to expand...
Click to collapse
APN settings is all I had. I have an ATT on ATT network, so I do not have too much experience configuring the phone on other carriers.
In the OP, you mentioned "This happens in all the iB4STiD new version of roms in every Kernels." Did it work on his older ROMs or another dev's ROM? If so, I'd suggest flashing one of those to see if it is still working.
guut13 said:
APN settings is all I had. I have an ATT on ATT network, so I do not have too much experience configuring the phone on other carriers.
In the OP, you mentioned "This happens in all the iB4STiD new version of roms in every Kernels." Did it work on his older ROMs or another dev's ROM? If so, I'd suggest flashing one of those to see if it is still working.
Click to expand...
Click to collapse
Yes, only happen when I have a iB4STiD ROM installed, in another case everything is working but isn't the best ROM. I want the GOLDENFINGER or GOLDENEYE
PD I upload the information in about and state. Screenshots
kevinlopz said:
Yes, only happen when I have a iB4STiD ROM installed, in another case everything is working but isn't the best ROM. I want the GOLDENFINGER or GOLDENEYE
PD I upload the information in about and state. Screenshots
Click to expand...
Click to collapse
Confirmed! I try with every Kernel and the solution is only install the GE 37 or less... can somebody speak to iB4STiD
PM him with ALL your details--
Did you wipe (not format) System/Data/Caches? I do it 3X
If you don't have lte, did you change your preferred data choice to hspa+/3g or whatever choice has no lte in it.
Pull and reinsert your sim--
rugmankc said:
PM him with ALL your details--
Did you wipe (not format) System/Data/Caches? I do it 3X
If you don't have lte, did you change your preferred data choice to hspa+/3g or whatever choice has no lte in it.
Pull and reinsert your sim--
Click to expand...
Click to collapse
Yes, yes and yes. I do all, but nothing change. I installed a old version of GE (37, 38, 38.1) doesn't work.
Now I'm trying with GE 30. First I trying SHOstock and seems work.
I got more information for you!
The problem started when I installed a KK 4.4.4 Rom, before this never happened anything and always a custom rom allowed me to call.
PD: ONLY with the stock rom (I337UCUAMDL_I337ATTAMDL_ATT) and a based 4.4.4 custom rom is installed it can use the phone for call. Not just the internet!
Anybody knows something about that???
kevinlopz said:
Anybody knows something about that???
Click to expand...
Click to collapse
try this ...
1. install a 4.4.2 stock tw rom for ur carrier via odin
2. flash a custom recovery
3. clean iwipe!!
4. flash my rom
if u never took a 4.4.2 official update that could be ur issue
iB4STiD said:
try this ...
1. install a 4.4.2 stock tw rom for ur carrier via odin
2. flash a custom recovery
3. clean iwipe!!
4. flash my rom
if u never took a 4.4.2 official update that could be ur issue
Click to expand...
Click to collapse
THANKS FOR ANSWER!
The I337UCUFNB1 baseband?
kevinlopz said:
THANKS FOR ANSWER!
The I337UCUFNB1 baseband?
Click to expand...
Click to collapse
The nb1 tar will work
Sent from my Nexus 5 using XDA Free mobile app
jd1639 said:
The nb1 tar will work
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
But to install the NB1, Its able to root and Loki'd
Its all the same thing of UCUAMDL?
Its all safe and secure, because I've sim unlock.
Can you paste a treat of any tutorial?
kevinlopz said:
But to install the NB1, Its able to root and Loki'd
Its all the same thing of UCUAMDL?
Its all safe and secure, because I've sim unlock.
Can you paste a treat of any tutorial?
Click to expand...
Click to collapse
No it's not at all the same as mdl!!!! If you're on mdl firmware Do Not flash nb1. Are you on mdl firmware?
Sent from my Nexus 5 using XDA Free mobile app
jd1639 said:
No it's not at all the same as mdl!!!! If you're on mdl firmware Do Not flash nb1. Are you on mdl firmware?
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
I attached a image of the about screen
kevinlopz said:
I attached a image of the about screen
Click to expand...
Click to collapse
You are on mdl firmware. It's android 4.2.2. You could try flashing a new modern. See rockrat's modems in the general forum
Edit, http://forum.xda-developers.com/showthread.php?p=46762296
Sent from my Nexus 5 using XDA Free mobile app
jd1639 said:
You are on mdl firmware. It's android 4.2.2. You could try flashing a new modern. See rockrat's modems in the general forum
Edit, http://forum.xda-developers.com/showthread.php?p=46762296
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
Wait, will change something if installing a modem?
kevinlopz said:
Wait, will change something if installing a modem?
Click to expand...
Click to collapse
No, it'll just flash the modern. Nothing else will change. I'm not sure if it will help you though. It could, modems sometimes work better and other times not. It depends on where you are and what works better in that location. You can always flash back to the mdl modem, i.e. baseband
Sent from my Nexus 5 using XDA Free mobile app
kevinlopz said:
Wait, will change something if installing a modem?
Click to expand...
Click to collapse
Changing the modem resolves the problem?
I can call with the stock rom (MDL) and 4.4.4 Roms like KANGARAT, BUT I can't call with GOLDENEYE or others kitkat based roms
I'm scared

[Q] Galaxy S4 (SGH-I337M) says NO MOBILE NETWORK (HELP!)

Hey guys,
I'm new to the forum so please excuse me if this is the wrong place to post this. I'll start from the beginning. I bought a Galaxy S4 (SGH-I337m) from somebody in my city. They said the phone originally worked with Rogers/Fido, but that they switched the logic board on it so now it works with Bell/Virgin. The thing is though, when I put my Virgin Mobile sim card in the phone, it won't let me send texts or make calls. I checked the IMEI and it's not blacklisted or anything.
It says No Service and has the little circle with a diagonal line showing up in the notification bar and when I try to send a text, it says No Network Connection (No signal found for mobile networks). I find it weird because I still get a notification saying that I have an unheard voicemail.
I've tried resetting the phone multiple times. I've also tried flashing both the Bell and Virgin Mobile Lollipop firmwares and that didn't work either. To be honest, I'm not sure how to tell which one I would need to install. I noticed when trying to flash the Bell firmware, that the phone kinda skips to a black screen quickly every time I close an app. I'm assuming that would mean it needs the Virgin Mobile firmware.
That still doesn't fix the mobile network issue though. If anyone could help me out, I would GREATLY appreciate it!!!! Here is a bit of info, I'm hoping it helps. If you need anything else, please let me know.
Model number: SGH-I337M
Android Version: 5.0.1
Baseband Version: I337MVLUGOC4
Build Number: LRX22C.I337MVLUGOC4
Also, in the "Status" menu, I noticed it says:
Service State
Voice: Out of Service / Data: Out of Service
Not sure if that has anything to do with it or if that's normal. Again, if you have any suggestions, PLEASE let me know. I'm super desperate as I can't afford to lose the money I paid for this. Thanks in advance.
EDIT: Coincidentally my girlfriend has a Galaxy S4 of the same model and with Bell/Virgin. I opened up the ABOUT DEVICE menu in both phones and the only other difference I noticed is on hers it says:
SE for Android Status:
"sepf_sgh-I337M_5.0.1_0013"
And mine says "sepf_sgh-I337M_5.0.1_0009"
Does that have anything to do with it maybe?
TeknikalMusic said:
Does that have anything to do with it maybe?
Click to expand...
Click to collapse
Install this APP and add all screenshots pls .
Okay, will do. I will post the screenshots in about 20 mins. I rooted the phone, installed CWM and am in the middle of flashing the latest firmware again. I forgot to enable USB debugging before flashing originally and I wanted to install CWM to wipe the cache. No idea if that would make a difference but I've been up all night trying anything lol. Thank you for the reply though, will post the screenshots in about 20 mins.
TeknikalMusic said:
Okay, will do. I will post the screenshots in about 20 mins. I rooted the phone, installed CWM and am in the middle of flashing the latest firmware again. I forgot to enable USB debugging before flashing originally and I wanted to install CWM to wipe the cache. No idea if that would make a difference but I've been up all night trying anything lol. Thank you for the reply though, will post the screenshots in about 20 mins.
Click to expand...
Click to collapse
Don't flash more things atm for avoid one brick pls :highfive:
Joku1981 said:
Don't flash more things atm for avoid one brick pls :highfive:
Click to expand...
Click to collapse
Okay, I have the app installed. Which screens should I screenshot? I know you shouldn't post your IMEI online, so I'm assuming I skip the "personal" tab or?
Here is 4 of the screenshots I took (I hope this works lol)
Here are the other 2 I took
TeknikalMusic said:
Here are the other 2 I took
Click to expand...
Click to collapse
All seems correct but I think your device works for Bell Mobile (BMC) only but NOT for Virgin Mobile (VMC). Try to use one BELL simcard for verify it.
Joku1981 said:
All seems correct but I think your device works for Bell Mobile (BMC) only but NOT for Virgin Mobile (VMC). Try to use one BELL simcard for verify it.
Click to expand...
Click to collapse
In all my experience, Bell/Virgin are always interchangeable. Same with Telus/Koodo and Rogers/Fido. I tried putting a Bell sim card in though just now and it still has the problem. It doesnt load any of the signal bars or anything. Oddly enough, when there is no sim card in the phone, the bars show up?
TeknikalMusic said:
In all my experience, Bell/Virgin are always interchangeable. Same with Telus/Koodo and Rogers/Fido. I tried putting a Bell sim card in though just now and it still has the problem. It doesnt load any of the signal bars or anything. Oddly enough, when there is no sim card in the phone, the bars show up?
Click to expand...
Click to collapse
Don't doubt it and return it if you can still.
Joku1981 said:
Don't doubt it and return it if you can still.
Click to expand...
Click to collapse
Since it was from Bell, would flashing the Virgin Mobile firmware somehow mess it up? What are the exact steps I would need to take to try to reset it back to stock settings? I'm wondering if I'm missing anything. Or if the APN settings have anything to do with it? I set them to default already and tried adding the Virgin Mobile Canada apn settings as well
http://forum.xda-developers.com/galaxy-s4-att is the proper place to ask your questions regarding your S4, rather than where you originally posted this, the International S4 forum. Since more people with your device will be available at the given link, you may want to ask your questions over there. Or simply be patient, as this thread will be moved over there in due time.

Can't Use CM13 with Unlocked L720?

So i've got a L720 that i've rooted, unlocked, and flashed CM12.1 snapshot, I flashed NAE baseband after unlocking and all is well, however I'd like to be able to use CM13, but every time that i flash either a nightly, or JDCTeam's optimized CM13 (which is what i'd prefer to use if a solution is available), It forces LTE/CDMA (auto) in the *#*#4636#*#* menu, if i pick GSM/WCDMA and reboot it just goes back to LTE/CDMA (auto) and i have no idea how to make it work, if there is even a way, does the GSM unlock not stick on 6.0.1 ROMs?
Thanks for any help you can give me :/
ThOnly1Lft said:
So i've got a L720 that i've rooted, unlocked, and flashed CM12.1 snapshot, I flashed NAE baseband after unlocking and all is well, however I'd like to be able to use CM13, but every time that i flash either a nightly, or JDCTeam's optimized CM13 (which is what i'd prefer to use if a solution is available), It forces LTE/CDMA (auto) in the *#*#4636#*#* menu, if i pick GSM/WCDMA and reboot it just goes back to LTE/CDMA (auto) and i have no idea how to make it work, if there is even a way, does the GSM unlock not stick on 6.0.1 ROMs?
Thanks for any help you can give me :/
Click to expand...
Click to collapse
Who is your carrier? You're going to need to flash an APN fix for your carrier to get proper data working.
Sent from my SCH-R220
mattzeller said:
Who is your carrier? You're going to need to flash an APN fix for your carrier to get proper data working.
Sent from my SCH-R220
Click to expand...
Click to collapse
MetroPCS is my carrier
ThOnly1Lft said:
MetroPCS is my carrier
Click to expand...
Click to collapse
You need to set your MetroPCS APNs to get data working,not sure if there is a flashable file, but google around
Sent from my SCH-R220
mattzeller said:
You need to set your MetroPCS APNs to get data working,not sure if there is a flashable file, but google around
Sent from my SCH-R220
Click to expand...
Click to collapse
I think you may be misunderstanding my issue or something.... When i flash a CM13 ROM i can't switch from LTE/CDMA mode to GSM/WCDMA mode in order to even get voice and texts... what will changing my APN do for that...?
ThOnly1Lft said:
I think you may be misunderstanding my issue or something.... When i flash a CM13 ROM i can't switch from LTE/CDMA mode to GSM/WCDMA mode in order to even get voice and texts... what will changing my APN do for that...?
Click to expand...
Click to collapse
Oh, I thought you were at least getting voice and SMS. Hmmm, I'm not too sure
Sent from my SCH-R220
mattzeller said:
Oh, I thought you were at least getting voice and SMS. Hmmm, I'm not too sure
Sent from my SCH-R220
Click to expand...
Click to collapse
deep sigh
ThOnly1Lft said:
deep sigh
Click to expand...
Click to collapse
That is the downside to making a non GSM phone work on a GSM network
Sent from my SCH-R220
mattzeller said:
That is the downside to making a non GSM phone work on a GSM network
Sent from my SCH-R220
Click to expand...
Click to collapse
Seems i may just be unable to use marshmallow ROMs and keep the GSM Unlock :/
Did anyone find a solution for this? I'm trying to use a Sprint Domestic Unlocked 720T with AT&T and running into the same issue. Cannot select GSM at all, no matter where (network mode shows -1). I've tried different modems, build.prop, hidden menus, etc. No GSM on the cm13 for the 720t??
blazie151 said:
Did anyone find a solution for this? I'm trying to use a Sprint Domestic Unlocked 720T with AT&T and running into the same issue. Cannot select GSM at all, no matter where (network mode shows -1). I've tried different modems, build.prop, hidden menus, etc. No GSM on the cm13 for the 720t??
Click to expand...
Click to collapse
Looks like we may be stuck on CM12 or LP based custom ROMs my friend
To be perfectly honest, you're not missing out on anything, having run the same ROM of LP and of MM, there is no real difference in regards to performance and battery life.
Sent from my SPH-L720 using Tapatalk
This is really sad... I've spent 3 days flashing various modems and can't find nothing. Though, I'd point out my LP kinda behaves same as my M, when it's done loading apps after flashing, it ask to insert simcard (same like my M), but then I go change the network type to 3g and network returns on the phone. Tried with cm13 but nothing, does anyone know what could be wrong??
my L720 detect sim but signal not work

Categories

Resources