Database Info

[Q] Unlock / valid sim OS upgrade Galaxy S3 (Verizon, Family Mobile)

I was wondering if someone could help me or point me in the right direction to avoid bricking my phone somehow.
First off, a bit of confirmation for anyone else out there... I have successfully moved my Verizon Galaxy S3 to Walmart Family mobile. Currently trying to (safely) rid myself of annoyances.
Bought a new device via ebay with clean ESN for Verizon (I'm unsure if it's still locked to Verizon network, see below for details)
None of the suggestions like *#1973 ... worked as my phone was on a 4.0.1 release (or so I think) I don't see any websites that would offer and unlock code and I read somewhere that the manual unlock needed something like 4.1.x or higher.
I used Odin to upgrade my device to 4.1.1 (Still couldn't find any unlocking info but..
Inserting my Family Mobile SIM card actually works (for calls and SMS) but the device still complains that it has a non-valid sim for Verizon. Going in to the Apps menu and killing the Setup Wizard 1.0 removes that message until the next reboot.
Optimally, I'd like to upgrade from 4.1.1 to 4.3 but have a few concerns.
Will an update rid me of the Verizon sim check? or is the sim checking piece not in the ROM but actually inside the bootloader itself?
I'm not highly technical (but dangerous enough I suppose).
When all is said and done I'm looking to have a 4.3 device with a Family Mobile APN that works (so far I don't believe that's occurred. Device is nice under wifi and says that cellular data is 'active' but I don't think it's working since I can't hit websites in cellular only mode.
Any suggestions for getting my device to a happy place without rooting it would be appreciated.
Thanks.

Being that I posted this for others as much as myself I'll go ahead and answer my own question.
After using Odin to bring my S3 (i535) phone up to rev 4.1.1 of Android using the Verizon image (only updating the AP, not the bootloader or other elements) I found online, I was able to cable the device in to a PC running Kies. After performing a quick backup I looked for potential firmware updates and was able to have Kies do the upgrade from 4.1.1 to 4.3. This removed most of my fear of applying something wrong (BL, AP, CP, CSC).
Once the update completed I was in fact asked to update to the new Kies 3 before restoring my backup. I can verify that running that update was smooth and the new Kies restored the backup created with the earlier version without issue.
The non Verizon SIM issue still exists on 4.3 but I continue to kill the Setup Wizard app after booting the phone and all seems OK.
I should also note that in 4.1.1 Verizon removed the ability to add APNs but that is now back in 4.3, so I was able to successfully update to the T-Mobile APN settings Walmart Family suggested.
Next month I will be attempting to move an unlocked global S3 mini GT-i8190 to Walmart Family as well. At present, the 4.1.2 OS is the latest release there. I do not intend to move that device to 4.3 at this time. I have read that it may be possible to rest the device and list is as Romanian (or some other eastern European country where Samsung did decide to offer the newest version to the public).
wirelessguyNY said:
I was wondering if someone could help me or point me in the right direction to avoid bricking my phone somehow.
First off, a bit of confirmation for anyone else out there... I have successfully moved my Verizon Galaxy S3 to Walmart Family mobile. Currently trying to (safely) rid myself of annoyances.
Bought a new device via ebay with clean ESN for Verizon (I'm unsure if it's still locked to Verizon network, see below for details)
None of the suggestions like *#1973 ... worked as my phone was on a 4.0.1 release (or so I think) I don't see any websites that would offer and unlock code and I read somewhere that the manual unlock needed something like 4.1.x or higher.
I used Odin to upgrade my device to 4.1.1 (Still couldn't find any unlocking info but..
Inserting my Family Mobile SIM card actually works (for calls and SMS) but the device still complains that it has a non-valid sim for Verizon. Going in to the Apps menu and killing the Setup Wizard 1.0 removes that message until the next reboot.
Optimally, I'd like to upgrade from 4.1.1 to 4.3 but have a few concerns.
Will an update rid me of the Verizon sim check? or is the sim checking piece not in the ROM but actually inside the bootloader itself?
I'm not highly technical (but dangerous enough I suppose).
When all is said and done I'm looking to have a 4.3 device with a Family Mobile APN that works (so far I don't believe that's occurred. Device is nice under wifi and says that cellular data is 'active' but I don't think it's working since I can't hit websites in cellular only mode.
Any suggestions for getting my device to a happy place without rooting it would be appreciated.
Thanks.
Click to expand...
Click to collapse

Moto G showing no service

Can someone olease help me i have a newly purchased Moto G x1033 i got a new microsim. (Did not cut it or anything)
Moto G detects the sim but says either no service or emergency calls only.
Im running on latest the latest kitkat version.
I have tried a master reset. Manually changing operators does not help. Should i get the phone replaced or is this a software issue?
please help thanks
Sent from my GT-S7562 using XDA Free mobile app

Do you have the possibility to try another sim?
If you can connect to an operator with another sim, then the problem must be your new sim.

Thanks for replying. I have tried 2 different sims in bothr the slots they still dont work. Though they do work on other phones. I dont think the new sim should be the problem i had used a cut sim first and then gotten a new micro sim.
UPDATE:
Some more info The signal bars are full and orange in colour/color and say No Service beneath them.
It also does show the name of the service provider at certain places.
UPDATE 2 :
I tried to switcj on mobile data and that seems to be working fine on 2G. But im still getying no service
Sent from my GT-S7562 using XDA Free mobile app

MufcTK said:
Can someone olease help me i have a newly purchased Moto G x1033 i got a new microsim. (Did not cut it or anything)
Moto G detects the sim but says either no service or emergency calls only.
Im running on latest the latest kitkat version.
I have tried a master reset. Manually changing operators does not help. Should i get the phone replaced or is this a software issue?
please help thanks
Sent from my GT-S7562 using XDA Free mobile app
Click to expand...
Click to collapse
The same thing happened to me but my G is a single sim, xt1032 cdma. When my phone was doing this, I actually tried to place and emergency call just to see if it would go through and it did not. Apparently the RF software was corrupted. To fix it I had to reflash the entire stock firmware.

Hi thanks i will try that. Could you just tell me will flashing the firmware again void my warrenty?
Also a link/tutorial to the procedure would be nice but i can look it up to.
Sent from my GT-S7562 using XDA Free mobile app

Flashing the firmware needs an unlocked bootloader.
By doing this your waranty will be voided.
In case you just recently bought your phone I would return it and ask for a new one.

I have the same issue. The weird thing is that 2G and 3G Internet works but voice calls don't work (voice registration state is emergency calls only, data registration state is connected). I flashed stock firmware again but that didn't help solve the issue. I have tried this with multiple SIM cards. I have requested a replacement however that is pending "approval".

Im having the exact same issue i also have asked for a full refund from Flipkart.
Ill see if i should buy another peice of moto g or shall i go for xperia C/M2
Sent from my GT-S7562 using XDA Free mobile app

This is weird. I reflashed the system partition and relocked the bootloader, and the phone is working fine now. I unlocked the bootloader and it still works. This doesn't make sense. How can reflashing just the system partition fix a network issue that occured in both stock and CM 11? The system partition had been formatted once or twice from CWM recovery earlier while I was going back and forth between CM and stock to debug this issue. Only reflashing the system partition from mfastboot fixed the issue.

it does not matter now i have returned the phone
Sent from my GT-S7562 using XDA Free mobile app

I just received this email from Flipkart:
Please find below the statement from Motorola on your recently purchased device.
We have uncovered an activation problem with some Moto G devices sold in India. If you have unboxed your Moto G and are having network connectivity problems this applies to you.
The problem: IMEI numbers are 15-digit unique codes that help cellular networks identify valid phones. If your new Moto G s IMEI number begins with 3533 your phone is incapable of connecting to the network right now because of a programming error on our part. It may take several days before your phone will connect to the network. You can find your IMEI number listed on the box or behind the back cover. At this stage, our understanding is that this only affects the 16GB version of Moto G.
How we are fixing it: We are working around the clock with our network partners to ensure your device is listed properly in their system. Because of the complex process to activate, your device could begin working as early as Tuesday or it may take a few days after that for your specific device to begin working properly.
If you are impacted, we apologize for the inconvenience this has caused to you. We let you down and are working around the clock to fix this issue.
To help make up for the issue if you are affected, we will be crediting your Flipkart wallet with Rupees 1200/-with which you can buy a Moto G cover or an item of your choice.
If you do not want to wait a couple of days for the phone to be activated, you can exchange it for an operational unit or return it for a full refund with Flipkart, no questions asked. Your replacement request will be processed after a week.
On behalf of Motorola, please accept our deepest apologies. We are passionate about making people happy with our products and we will work tirelessly to gain back your trust.
Regards,
Flipkart Customer Care
Click to expand...
Click to collapse
So my guess is that reflashing the system didn't solve the issue, instead something changed on the network operator end by the time I reflashed the system partition and tested it again.

Could have been that.
Im going to order the phone again once it is back in stock.
Sent from my GT-S7562 using XDA Free mobile app

FINALLY , AT&T LG Vigor D725 Stock KitKat 4.4.2 KDZ Firmware File

Hi everyone, I've been a longtime lurker here on XDA for anything and everything I've needed for my devices, but in the six-or-so years I've been on here, I've never had anything to contribute on my own for the community. Today, however, I'm stoked to say that for the small number of people that haven't given up on the LG G3 Vigor, I FINALLY was able to obtain a stock firmware 4.4.2 file in .KDZ format direct from LG.
I, like many others on here and other G3 communities, have struggled for the past few months in trying to keep this device stable, but apparently the Vigor (more so the D725 AT&T variant, since it seems the Sprint LS885 has a little more support, but still basically next to nothing at all for both) is a redheaded stepchild or something since no one I've seen on here has been able to offer anything other an a root method for it, however I can't help but think that was just dumb luck since that root method has been proven to work on to work on ALL the G3 variants. Anyway, after almost giving up on this device after six months of not being able to find a stock firmware ROM file for it, let alone any custom ROM, I tried calling LG as a last resort with not much hope. Lucky for me though, I got a super nice rep by the name of Rachel, who immediately understood what I was asking and e-mailed me a link to the only stock firmware file they have for it - a D725PR 4.4.2 firmware file in .KDZ format.
You may notice that the model number - D725PR - isn't either of the AT&T or Sprint models. It's actually for the LG G3 Beat that was released for Puerto Rico, but it is basically identical to the D725 and LS885 minus the carrier APN settings, and of course no AT&T or Sprint bloatware. Rachel was so confident that this file was what I needed, that she wanted me to flash it while on the phone with her, and if it didn't work and I ended up with a brick, she'd open a warranty ticket to replace it free of charge since my Vigor is still under warranty (as are almost all others I think, since the Vigor was released late 2014.) I used the LG Flash Tool under Windows 10 while on the phone with the rep the whole time, and sure enough, about six minutes and two reboots later, the device booted right up to the LG setup welcome screen. I was told that since the KDZ is technically for the Puerto Rico variant, I'd likely have to manually input AT&T's APN settings for data, but it configured itself and AT&T's APN profile in the mobile network/tethering menu was already in there. Now, my device is unlocked, so I don't know if maybe that's why it configured itself on its own, but if you flash this file to factory restore or downgrade, or remove root and find you don't have your carrier's APN profile in there, just do a Google search for the settings, and you should get your data back.
Sorry this post ended up being a novel, but I'm very happy that I finally managed to score this stock firmware file after LITERALLY six months of it sitting in a drawer, pulling it out every so often in hopes that somewhere online, someone posted the file to finally get everyone flashed back to stock, but nope. I don't see why this wouldn't work for anyone else with an AT&T or Sprint Vigor, but obviously I must say I can't be held responsible if, for whatever reason, something bad happens. I hope this was able to help at least SOMEONE other than myself, because like I said, I've been using this forum for the past six-or-so years to keep up with development and learn to root whatever new device I got, but never contributed myself. This community deserves it, because no one on here has to do what they do, yet they choose to do it all for free, as a public service or something, in order to help others have a better experience with their devices. And for that, I myself am forever grateful. I hope this helps - good luck!
Stock 4.4.2 KitKat .KDZ Firmware File for AT&T LG G3 Vigor D725 & LG G3 Beat Download Link:
https://drive.google.com/file/d/0B1hunq5HgRmTQkItSjY4R0l5dVE/view?usp=sharing

TJBilyk said:
Hi everyone, I've been a longtime lurker here on XDA for anything and everything I've needed for my devices, but in the six-or-so years I've been on here, I've never had anything to contribute on my own for the community. Today, however, I'm stoked to say that for the small number of people that haven't given up on the LG G3 Vigor, I FINALLY was able to obtain a stock firmware 4.4.2 file in .KDZ format direct from LG.
I, like many others on here and other G3 communities, have struggled for the past few months in trying to keep this device stable, but apparently the Vigor (more so the D725 AT&T variant, since it seems the Sprint LS885 has a little more support, but still basically next to nothing at all for both) is a redheaded stepchild or something since no one I've seen on here has been able to offer anything other an a root method for it, however I can't help but think that was just dumb luck since that root method has been proven to work on to work on ALL the G3 variants. Anyway, after almost giving up on this device after six months of not being able to find a stock firmware ROM file for it, let alone any custom ROM, I tried calling LG as a last resort with not much hope. Lucky for me though, I got a super nice rep by the name of Rachel, who immediately understood what I was asking and e-mailed me a link to the only stock firmware file they have for it - a D725PR 4.4.2 firmware file in .KDZ format.
You may notice that the model number - D725PR - isn't either of the AT&T or Sprint models. It's actually for the LG G3 Beat that was released for Puerto Rico, but it is basically identical to the D725 and LS885 minus the carrier APN settings, and of course no AT&T or Sprint bloatware. Rachel was so confident that this file was what I needed, that she wanted me to flash it while on the phone with her, and if it didn't work and I ended up with a brick, she'd open a warranty ticket to replace it free of charge since my Vigor is still under warranty (as are almost all others I think, since the Vigor was released late 2014.) I used the LG Flash Tool under Windows 10 while on the phone with the rep the whole time, and sure enough, about six minutes and two reboots later, the device booted right up to the LG setup welcome screen. I was told that since the KDZ is technically for the Puerto Rico variant, I'd likely have to manually input AT&T's APN settings for data, but it configured itself and AT&T's APN profile in the mobile network/tethering menu was already in there. Now, my device is unlocked, so I don't know if maybe that's why it configured itself on its own, but if you flash this file to factory restore or downgrade, or remove root and find you don't have your carrier's APN profile in there, just do a Google search for the settings, and you should get your data back.
Sorry this post ended up being a novel, but I'm very happy that I finally managed to score this stock firmware file after LITERALLY six months of it sitting in a drawer, pulling it out every so often in hopes that somewhere online, someone posted the file to finally get everyone flashed back to stock, but nope. I don't see why this wouldn't work for anyone else with an AT&T or Sprint Vigor, but obviously I must say I can't be held responsible if, for whatever reason, something bad happens. I hope this was able to help at least SOMEONE other than myself, because like I said, I've been using this forum for the past six-or-so years to keep up with development and learn to root whatever new device I got, but never contributed myself. This community deserves it, because no one on here has to do what they do, yet they choose to do it all for free, as a public service or something, in order to help others have a better experience with their devices. And for that, I myself am forever grateful. I hope this helps - good luck!
Stock 4.4.2 KitKat .KDZ Firmware File for AT&T LG G3 Vigor D725 & LG G3 Beat Download Link:
https://drive.google.com/file/d/0B1hunq5HgRmTQkItSjY4R0l5dVE/view?usp=sharing
Click to expand...
Click to collapse
Thanks for this, but that kdz has been around for a good while now. It's just not many people want to test it on there device.
Sent from my iPhone using Tapatalk

Not meaning to beat a dead horse as I know this thread hasn't seen activity in several months but I wanted to let others know that I took a chance with my D725 running the factory 4.4.2 firmware from AT&T and installed the firmware in the OP and voila, it works without any issues that I've noted so far aside from a particular menu option not being available (the Phone info page when using *#*#4636#*#*). Everything else so far has worked with one additional bonus:
If you attempt to use the factory D725 firmware with T-Mobile's network or any MVNO that uses their network you will not get LTE service - it just won't happen. It frustrated me when I discovered this little aspect because AT&T's firmware only supports LTE bands 1/3/7 for "roaming bands" aka anything that's not AT&T - T-Mobile uses bands 2 and 4 which AT&T also uses but it appears that if you put a non-AT&T SIM in this device (the D725 running the factory firmware) it will not allow connections using those bands 2 and 4.
You also can't even choose LTE using the Phone info page - the option to choose a preferred network type is removed in that firmware (to the best of my knowledge it's not there - I only have my D725 as a point of reference so I can't speak for anyone else and again this is strictly for the 4.4.2 firmware, I won't touch the Lollipop update anytime soon).
However, I took a chance and installed the Puerto Rican firmware just now and voila, with the addition of the T-Mobile LTE APN info (fast.t-mobile.com) and changed the network type under Mobile networks (an option that does not exist in the factory AT&T firmware there either) I've got LTE AWS service now.
I made a post in the "main" G3 Vigor thread with screenshots if anyone is interested:
http://forum.xda-developers.com/showpost.php?p=65081251&postcount=300
I'm already committed to selling this Vigor but I just wanted other D725 owners out there (probably not a whole hell of a lot of us it seems based on hardly any posting activity about our device) that yes, if you're missing out on T-Mobile LTE service with your presumably unlocked LG G3 Vigor by using the factory AT&T 4.4.2 firmware that there's hope and it comes from the Puerto Rican bloatware-free firmware + adding the fast.t-mobile.com APN information.
Have fun, always...

Thank you. I've been looking for a ROM to flash my D725. I will give this a try. Thank s again to TJBilyK and br0adband for this info!

how do you flash you phone??? wich what tool you doing this flash????? thanks in advance!!!
---------- Post added at 03:53 PM ---------- Previous post was at 03:52 PM ----------
br0adband said:
Not meaning to beat a dead horse as I know this thread hasn't seen activity in several months but I wanted to let others know that I took a chance with my D725 running the factory 4.4.2 firmware from AT&T and installed the firmware in the OP and voila, it works without any issues that I've noted so far aside from a particular menu option not being available (the Phone info page when using *#*#4636#*#*). Everything else so far has worked with one additional bonus:
If you attempt to use the factory D725 firmware with T-Mobile's network or any MVNO that uses their network you will not get LTE service - it just won't happen. It frustrated me when I discovered this little aspect because AT&T's firmware only supports LTE bands 1/3/7 for "roaming bands" aka anything that's not AT&T - T-Mobile uses bands 2 and 4 which AT&T also uses but it appears that if you put a non-AT&T SIM in this device (the D725 running the factory firmware) it will not allow connections using those bands 2 and 4.
You also can't even choose LTE using the Phone info page - the option to choose a preferred network type is removed in that firmware (to the best of my knowledge it's not there - I only have my D725 as a point of reference so I can't speak for anyone else and again this is strictly for the 4.4.2 firmware, I won't touch the Lollipop update anytime soon).
However, I took a chance and installed the Puerto Rican firmware just now and voila, with the addition of the T-Mobile LTE APN info (fast.t-mobile.com) and changed the network type under Mobile networks (an option that does not exist in the factory AT&T firmware there either) I've got LTE AWS service now.
I made a post in the "main" G3 Vigor thread with screenshots if anyone is interested:
http://forum.xda-developers.com/showpost.php?p=65081251&postcount=300
I'm already committed to selling this Vigor but I just wanted other D725 owners out there (probably not a whole hell of a lot of us it seems based on hardly any posting activity about our device) that yes, if you're missing out on T-Mobile LTE service with your presumably unlocked LG G3 Vigor by using the factory AT&T 4.4.2 firmware that there's hope and it comes from the Puerto Rican bloatware-free firmware + adding the fast.t-mobile.com APN information.
Have fun, always...
Click to expand...
Click to collapse
how do you flash you phone??? wich what tool you doing this flash????? thanks in advance!!!

How to safely root after going to D725PR
After following the steps in this post to install the D725PR firmware successfully, I am wondering how to safely root this device.
Background
Six months ago I used the above method successfully to resolve a problem I had with my LG G3 Vigor D725 which I purchased unlocked on eBay. I had been and continue to be able to use the phone network here in the Fiji islands where I live, with either of the two main providers here, Vodafone and Digicel, depending on which company's SIM card I have installed. My problem was that I was unable to enable the wifi hotspot feature in the phone (with either provider) so I could connect my laptop to the internet via the phone. Upon pressing "Enable" (of wifi hotspot) in the phone, it would disappear for 15 secs then come back with an error saying it could not connect with the network due to a network fault. I took it to the best engineers at the mobile phone companies here and they tried everything they could and in the end advised me the problem was in my phone, not with their networks. So I flashed the phone with this Puerto Rican version of the firmware and voila, I have been able to use the wifi hotspot feature ever since. So a sincere thank you for making this available and as this was my first and only phone flash experience and I could never have done it without all the detailed instructions, the link to the flash tool etc. I still have one problem though, I would like to be able to root the phone but I am unsure how to do that without bricking it or undoing the progress I have made. "Root Checker" tells me "Sorry! Root access is not properly installed on this device". Thank you in advance.

TRACFONE sch-s968c, 4.1.2 BLoWz! need root then RoM

Hi folks I''ve read quite alot about the Straight Talk Variant of this phone.
Carrier is pageplus cellular. They were recently bought out by tracfone.
When booting, the phone displays the ugly Tracfone logo and came loaded with default tracfone apps and browzer bookmarks, though both phones were sold by pageplus.
EVERYTHING I know about any fone sold by tracfone (much less the OLD TFn) or its subsidiaries reflects they are really really hard to root or mod, but b/c it was a genuine S3 I took the chance, usually I get an old VZW unit off ebay.
What I have:
sch-s968c
Android Ver.
4.1.2
BaseBand
S968CUDUANH2
Kernel Ver.
3.0.30-1564380-user
[email protected] #1
Build No.
JZO54K.S6968CUDUANH2
Date
Aug 7, 2014
Mobile Network
EvDo-rev.A:8
------------------------------------------------------------
pageplus cellular was unable to get the mobile broadband working, I got that fixed chopping down an OLD (3 years at least) TFn SIM and poking it in the slot -- eazy peazy
However, Stock 4.1.2 utterly BLOWS CHUNKS. 2 bars at best in my rural area. I hear USC, SPR, and VZW (all cdma) users are getting 3-4 @ my place (my kids friends)
I know threads exist for the StraightTalk variant of the s968c, however I don't know which 'Destructions' to use. Some say a special version of the OctOS (?) TWRM recovery, but the link to it is broken. What about Heimdahl? Reason I ask is I don't use windows, ever since too many things no longer work on XP... Do I HAVE to use windows? Running win7 in a VM is an option but then there's the struggle to get the VM to correctly access USB...
Once I get root, I NEED a ROM, rooted with no google or chrome, I'm a security freak and won't run any app that needs that 'Safeguard' or whatever that is... Basicly I don't run google anything and don't use fB etc on the fone. In order to effectively firewall and adbock I need root ~~ Can't figure out which RELIABLE stripped down RoM to pick.
Then there is the notorious Camera issue. What do I need to back up, in order to reload the decent Proprietary Samsung Camera? (I truly do require good camera for my work) I don't mind to use Stock VZW etc firmware as long as I can root the thing and disable the bloat and calling home crap. I have seen some ROMs that are stock based, but I do not see any rooted ones.
Is the solution found in rooting after I load (which one?) ROM?
The poor signal strength ~~ is this a firmware issue or a hardware issue? I have heard that some S3's are just "wrong" (Verizon type -- might not be some) others have said its RIL or APN related... but since the APN comes from the SIM, I wonder if Id be better off experimenting with different SIM?
Thanks in advance ... Before I get Napalmed for starting a new thread, I looked everywhere and couldn't find much on a phone originally from Tracfone, much less on my rinky dink carrier
VW

Credo Mobile ROMs

Hey guys, I've been searching for a new ROM for a while now, I was running pure nexus on 6.0.1 but obviously that's been updated and that's where I ran into my issue. Pure nexus seemed to work fine for me and all was well but, slowly as the ROM became outdated and everything moved onto 7.0 my battery life and quality seemed to get worse and worse. Eventually my phone was randomly turning off at 60-70% battery. So, I figured it was time for a new ROM however, when I installed the Nougat version of pure nexus I was unable to receive cell service and data. Now I'm assuming this is due to the fact that my phone is tied to Credo Mobile, for a carrier and they have some funky proprietary firmware they put on their phones. So my question is, does anybody that is on Credo know of any ROMs that might work on our phones, and/or does anybody know what could possibly be going wrong? I've tried quite a bit of troubleshooting, flashing the stock bootloader and radios, editing my APNs to match the ones I could find online for Credo, I've tried multiple different ROMs including OctOS, Carbon, Zephyr, CM, and many more, and of course the other troubleshooting options such as updating recovery, supersu, etc. I am completely stumped, and any help is appreciated. Thanks!

Every nexus phone comes unlocked even when purchased from a carrier, so there should not be any proprietary firmware on your phone from the carrier. My guess is your EFS got messed and thats why you arent getting any cell service. Goto settings and check if your IMEI is displayed. If it is a 0 then your EFS is the problem. Also did you revert to the latest stock version and see if the problem still existed? It can be found here : https://developers.google.com/android/images#hammerhead

I'm fairly certain my service still works on stock, I haven't checked in a while, but I'll do that just to be sure. I doubt all of that really helps but I figure you know more than I do haha. To further explain I also seem to be able to proc my service to work when I switch airplane mode off and back on again, but only for a couple seconds and it craps out after that. It at least detects the SIM card, but no service whatsoever. I'm thinking it could possibly have something to do with the APNs but, I've tried so many different combinations of different Credo APNs online I'm not sure that's actually what's wrong.
Edit: I should also add that on the Credo SIM card under mobile networks in the settings there are carrier settings where you can choose to update your PRL and update your Profile. When I do this the PRL successfully updates but the profile update gets stuck on "The network is preparing your services."

Okay so I reverted to stock and after successfully updating my PRL and Profile I was able to verify service and data are working perfectly. Getting an average of 4-5 bars.