Help! Phone switched to CDMA - Galaxy S6 Q&A, Help & Troubleshooting

Dear all,
I have a global version of galaxy s6 (g920f) originally on stock rom 6.0.1 and rooted. Last night i was trying to change my network preference settings from lte/gsm to lte/gsm/cdma through *#*#4636#*#*.
I did that because my phone either stays at 4g or 2g only without switching to 3g. However, after doing that, my phone suddenly switched itself permanently to cdma mode only, which is not usable in my country (malaysia).
I've done factory reset, reflashing stock firmware to stock though odin but the phone stays the same and become unusable. I've tried searching for other solution in the forum but i cant seem to find one.
Kindly advise,
Thank you very much.

Related

[Q]

Hi everybody,
I have been following XDA for years now and have always been able to find answers to my questions here regarding flashing for a HTC Desire, Galaxy SII or my current Galaxy S4 I9505, rooted running a 4.3 GPE rom. Baseband is XXUDMB. Recovery is CWM 6.0.4.4.
After following the thread GOOGLE EDITION 4.4.2 by Danvdh, Kryten2k35 & Ktoonsez I decided to flash. Love this rom, it's superfast!!! One thing didn't work for me: the phone kept losing connection with my Dutch mobile carrier Vodafone (no data, phone calls not possible), especially after locking the screen. To my understanding the rom does not ship with LTE of GSM modems, so it should not be the problem that a 4.4 LTE modem causes sound, data or WiFi problems when on the "old" bootloader (pre KNOX). After flashing the baseband still shows XXUDMB.
I tried *#*#4636#*#* and setting network type to GSM. However, the menu is not the same as my current 4.3 and the option LTE/GSM auto (PRL) is not available.
Reverted back to my 4.3 rom for now, but really hope somebody knows how to solve the issue.

Lost 3G/4G signal, no internet

Hello guys,
Yesterday my LG G2 from T-Mobile and also wife LG G2 from T-Mobile lost que 3G/4G icon and the internet service. Yes, both phones!
The phones can call, get sms but no internet. Already perform a factory reset, hard reset, added the right APN, tryed to change the network mode, tryed with my 3 local operators and nothing, no internet or 3G/4G signal
I'll try to return the phone to stock 4.2.2 to check if this can fix the problem, currently running 4.4.2 stock.
Any other suggestion? Maybe it's just a simple fix but coulnd't find anything.
Returned to stock android 4.2.2, using this guide: http://forum.xda-developers.com/showthread.php?t=2432476, by the Tot method and it's working again, updated to 4.4.2 via OTA and everything seems fine now :good:

Help needed for CDMA data service (downgrading from 4.4.2 to lower version)

I have a Samsung Galaxy S3 SCH-I535 CDMA Verizon & GSM phone. Originally it was on android 4.1.2 and working fine for both CDMA and GSM (one at a time). CDMA EVDO Rev A data service was working fine.
I am using this phone in Nepal (not in USA). It was carrier unlocked for both CDMA & GSM when I purchased from Amazon. (so, I guess, Originally it may had some customized firmware/ROM for International use, I don’t have much idea).
I was asked for firmware upgrade every time when I run Samsung Kies. One day I clicked to upgrade the firmware. The upgrade was over successfully. But the new android version I found on my phone was 4.4.2.
In this version /new upgrade, I was unable to use CDMA data (EVDO-rev A). So I wanted to reverse back to old version. I search the process in Google and tried to load firmware with the help of Odin3 using this file:- “I535VRBMF1_I535VZWBMF1_VZW.zip”, but it was not successful. Result: Fail(Auth)
Then I loaded firmware for 4.4.2 using Odin3.09 (AP: “I535VRUDNE1_I535VZWDNE1_I535VRUDNE1_HOME.tar.md5”) and now the phone is working.
• If I use GSM SIM I can make call and use HSPA data service as well by adding new APN.
• If I use CDMA RUIM I can make call, BUT DATA SEVRICE using CDMA EVDO Rev A is NOT WORKING!! (I can not save APN in this case).
Now my issue is how to make CDMA EVDO data service working in my phone, because my basic requirement is to use this phone for CDMA service (voice + data).
I can edit the APN but when I click “Save”, nothing was saved. So I can not select APN for my carrier. I tried using APN Manager Pro too, here I can enter & enable the APN, but did not work. The phone is not able to dial the data access code #777 (verified from CDMA service provider side trace).
Can someone help me what I should do to make my phone working for CDMA data. My phone is rooted.
I guess it may work for CDMA data if I downgrade it to 4.3 or 4.1.2,
Can I do that. If so what are the procedures / steps. Any help in this regard would be highly appreciable.
My data worked this way
kkafle said:
I have a Samsung Galaxy S3 SCH-I535 CDMA Verizon & GSM phone. Originally it was on android 4.1.2 and working fine for both CDMA and GSM (one at a time). CDMA EVDO Rev A data service was working fine.
I am using this phone in Nepal (not in USA). It was carrier unlocked for both CDMA & GSM when I purchased from Amazon. (so, I guess, Originally it may had some customized firmware/ROM for International use, I don’t have much idea).
I was asked for firmware upgrade every time when I run Samsung Kies. One day I clicked to upgrade the firmware. The upgrade was over successfully. But the new android version I found on my phone was 4.4.2.
In this version /new upgrade, I was unable to use CDMA data (EVDO-rev A). So I wanted to reverse back to old version. I search the process in Google and tried to load firmware with the help of Odin3 using this file:- “I535VRBMF1_I535VZWBMF1_VZW.zip”, but it was not successful. Result: Fail(Auth)
Then I loaded firmware for 4.4.2 using Odin3.09 (AP: “I535VRUDNE1_I535VZWDNE1_I535VRUDNE1_HOME.tar.md5”) and now the phone is working.
• If I use GSM SIM I can make call and use HSPA data service as well by adding new APN.
• If I use CDMA RUIM I can make call, BUT DATA SEVRICE using CDMA EVDO Rev A is NOT WORKING!! (I can not save APN in this case).
Now my issue is how to make CDMA EVDO data service working in my phone, because my basic requirement is to use this phone for CDMA service (voice + data).
I can edit the APN but when I click “Save”, nothing was saved. So I can not select APN for my carrier. I tried using APN Manager Pro too, here I can enter & enable the APN, but did not work. The phone is not able to dial the data access code #777 (verified from CDMA service provider side trace).
Can someone help me what I should do to make my phone working for CDMA data. My phone is rooted.
I guess it may work for CDMA data if I downgrade it to 4.3 or 4.1.2,
Can I do that. If so what are the procedures / steps. Any help in this regard would be highly appreciable.
Click to expand...
Click to collapse
I think your problem is the region is not set Nepal...I installed dark jb rom in my phone and data was gone since then. Then I manually downloaded stock firmware and flashed through odin but still data wasnt working,nd while in recovery mode i saw region INS ie India. then something came in my mind and.. .I changed it to NPL and now i can use data in only sim 1 only not in both sims. So i also may need some help.
For you *#272*IMEI# . Use your phones IMEI number there (*#06#) . Select NPL region.
NOTE: It will hard format your phone installing required carrier apps, aps, bla bla and hope work on your phone
Pujan Shrestha said:
I think your problem is the region is not set Nepal...I installed dark jb rom in my phone and data was gone since then. Then I manually downloaded stock firmware and flashed through odin but still data wasnt working,nd while in recovery mode i saw region INS ie India. then something came in my mind and.. .I changed it to NPL and now i can use data in only sim 1 only not in both sims. So i also may need some help.
For you *#272*IMEI# . Use your phones IMEI number there (*#06#) . Select NPL region.
NOTE: It will hard format your phone installing required carrier apps, aps, bla bla and hope work on your phone
Click to expand...
Click to collapse
I found that the hidden menu (& hence secret code dialing) was disabled in my phone. Following guides from Google search I enabled it. Now codes likes "*#06#",*#1111#", "*#0228#" etc are working, but "*#272*IMEI#" is not working. Any idea, why it is not working?
kkafle said:
I have a Samsung Galaxy S3 SCH-I535 CDMA Verizon & GSM phone. Originally it was on android 4.1.2 and working fine for both CDMA and GSM (one at a time). CDMA EVDO Rev A data service was working fine.
I am using this phone in Nepal (not in USA). It was carrier unlocked for both CDMA & GSM when I purchased from Amazon. (so, I guess, Originally it may had some customized firmware/ROM for International use, I don’t have much idea).
I was asked for firmware upgrade every time when I run Samsung Kies. One day I clicked to upgrade the firmware. The upgrade was over successfully. But the new android version I found on my phone was 4.4.2.
In this version /new upgrade, I was unable to use CDMA data (EVDO-rev A). So I wanted to reverse back to old version. I search the process in Google and tried to load firmware with the help of Odin3 using this file:- “I535VRBMF1_I535VZWBMF1_VZW.zip”, but it was not successful. Result: Fail(Auth)
Then I loaded firmware for 4.4.2 using Odin3.09 (AP: “I535VRUDNE1_I535VZWDNE1_I535VRUDNE1_HOME.tar.md5”) and now the phone is working.
• If I use GSM SIM I can make call and use HSPA data service as well by adding new APN.
• If I use CDMA RUIM I can make call, BUT DATA SEVRICE using CDMA EVDO Rev A is NOT WORKING!! (I can not save APN in this case).
Now my issue is how to make CDMA EVDO data service working in my phone, because my basic requirement is to use this phone for CDMA service (voice + data).
I can edit the APN but when I click “Save”, nothing was saved. So I can not select APN for my carrier. I tried using APN Manager Pro too, here I can enter & enable the APN, but did not work. The phone is not able to dial the data access code #777 (verified from CDMA service provider side trace).
Can someone help me what I should do to make my phone working for CDMA data. My phone is rooted.
I guess it may work for CDMA data if I downgrade it to 4.3 or 4.1.2,
Can I do that. If so what are the procedures / steps. Any help in this regard would be highly appreciable.
Click to expand...
Click to collapse
Well, it looks to me as though you've locked your bootloader and are now stuck on 4.4.2. For some reason, Verizon forces Samsung to lock their bootloaders, which means we (the consumers) cannot install "custom" firmware on our devices (or downgrade).
Once you're on 4.4.2 NE1 your stuck with it. No downgrade possible at least not without a Jtag service
Sent from my SCH-I535 using Xparent ICS Tapatalk 2
I have faced similar problem I can't create apn I am using it in India . So my data i not working on any sim card but i can make and receive calls . My android version is also 4.3 . So please help me i want to use both hspa and evdo .
Sent from my iPhone using Tapatalk

[Q] Wrong radio flash

Was up to many hours and accidentally flashed tmobile marshmellow radio onto my phone. reflashed with propper radio and original firmware and know only get edge when trying to use gsm sim.. previously was getting 4glte with gsm sim. have tried dfs and enabled the lte bands and saved it but when try to add the lte config data never sticks ... help please cause edge sucks lol..
bigfdaddy2 said:
Was up to many hours and accidentally flashed tmobile marshmellow radio onto my phone. reflashed with propper radio and original firmware and know only get edge when trying to use gsm sim.. previously was getting 4glte with gsm sim. have tried dfs and enabled the lte bands and saved it but when try to add the lte config data never sticks ... help please cause edge sucks lol..
Click to expand...
Click to collapse
Stock recovery factory reset tried yet?
Sent from my SM-T810 using Tapatalk
dottat said:
Stock recovery factory reset tried yet?
Sent from my SM-T810 using Tapatalk
Click to expand...
Click to collapse
yes i have tried that multiple times ..phone wont go into global mode stays in lte/cdma mode but have gotten lte back flashing the marshmallow firmware verizon pushed out ...so know gotta get rest back hopefully ... any help on that front be great ...
bigfdaddy2 said:
Was up to many hours and accidentally flashed tmobile marshmellow radio onto my phone. reflashed with propper radio and original firmware and know only get edge when trying to use gsm sim.. previously was getting 4glte with gsm sim. have tried dfs and enabled the lte bands and saved it but when try to add the lte config data never sticks ... help please cause edge sucks lol..
Click to expand...
Click to collapse
phone know gets 4g lte but is stuck in lte/cdma mode wont switch to global.....
Any help
Sent from my SM-N910V using Tapatalk

LTE not detected-Sprint

Hello. LTE is not detected on my Nexus 5 (Sprint).
I've been thinking on downloading a factory image ( https://developers.google.com/android/images#hammerhead). Will this image override my modem/baseband drivers?
My ex used this phone before. I would not be surprised if she did something weird to the phone.
Any other ideas? I already tried *#*#3282#*#* and *#*#4636#*#* to select only LTE, then LTE/CDMA then I have updated the PRL..
Thanks

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