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[GUIDE] Changing the PRL on the Galaxy S III

For anyone interested in changing their PRL, the method is as simple as ever.
This is on a Sprint phone but should work with any CDMA carrier.
*I AM NOT RESPONSIBLE IF YOU BRICK YOUR DEVICE*
0. Make sure you're on a Touchwiz ROM. This can be stock or modified, as long as it's Touchwiz.
1. Be rooted!
2. Find your MSL using this handy guide over here: http://forum.xda-developers.com/showthread.php?t=1745888
3. Make sure you have downloaded the phone's drivers onto your computer.
4. Open your phone's dialer and type *#7284#"
5.PhoneUtil should now be open. Click on "Qualcomm USB Settings" and select "DM + Modem + ADB." Remember to change this back after you change your PRL.
6. Plug your phone into your computer; let your phone recognize the phone.
7. Download your preferred PRL from the internet. I usually use 11115, but you can use whichever one you find best.
(Verizon users, obviously choose the appropriate PRL for your carrier. I used a Sprint one.)
8. Open "Device Manager" on your computer; click on "Ports" and see which COM port your phone is connected to on your PC.
9. Use the program "CDMA Workshop" to connect to your phone by selecting the correct COM port, clicking "Connect," and then clicking "Read."
10. Go to the "Security" tab and put in your MSL into the box under "SPC." Click the "SPC" button and click "Send." It should say that the phone is unlocked.
11. Under PRL, click "Write" and select the PRL you want to switch to.
12. It should say that it successfully wrote; exit the program and let it reboot the phone when it asks.
13. Enjoy your new PRL!
I have been told by several people that a simpler method works using only your phone ( http://forum.xda-developers.com/showthread.php?t=1660740), but I have not had a chance to try it myself.
Sent from my SPH-L710 using xda app-developers app

but why change it?

jamesnmandy said:
but why change it?
Click to expand...
Click to collapse
I guess PRLs are probably more of a Sprint issue (just because we generally roam much more) but Verizon users may choose to use older PRLs that they may have found worked better for them, or perhaps use a modified Alltel/Sprint mixed PRL to improve general coverage when going out of Verizon's coverage zone.
I'm not completely familiar with Verizon's PRLs as of yet, but will look into them. I would now but I'm on vacation .
I do have one PRL on my computer that will prefer to roam to Sprint if there is no Verizon reception available (which, believe it or not, actually happens sometimes). When I get back from vacation I will attach the file to the OP.
Sent from my SPH-L710 using xda app-developers app

CDMA Workshop costs money.
I can't do this with QPST?

LLStarks said:
CDMA Workshop costs money.
I can't do this with QPST?
Click to expand...
Click to collapse
You can do this with QPST, however why would anyone on Verizon want to change their PRL? The only other networks you can roam onto are slower and drop calls frequently.
If you insist, I'll PM you how to do it with QPST.
OP:
Why is this in the development section? It's a guide. Plus you already have it posted in General and in the Sprint Development. Since it works on multiple devices, consider just having one OP in the General section. It makes it easier for us and for you to check up on.

StrumerJohn said:
You can do this with QPST, however why would anyone on Verizon want to change their PRL? The only other networks you can roam onto are slower and drop calls frequently.
If you insist, I'll PM you how to do it with QPST.
OP:
Why is this in the development section? It's a guide. Plus you already have it posted in General and in the Sprint Development. Since it works on multiple devices, consider just having one OP in the General section. It makes it easier for us and for you to check up on.
Click to expand...
Click to collapse
This is posted in development because in the Sprint development forum guides and how-tos are allowed. I have already requested that the mods delete the one on general, especially since this only works on CDMA.
I'm on vacation out West and actually get six bars using Sprint as opposed to the friend I'm traveling with, who gets none on his Verizon iPhone. I guess it really depends where you are in the country.
Sent from my SPH-L710 using xda app-developers app

elfhater said:
This is posted in development because in the Sprint development forum guides and how-tos are allowed. I have already requested that the mods delete the one on general, especially since this only works on CDMA.
I'm on vacation out West and actually get six bars using Sprint as opposed to the friend I'm traveling with, who gets none on his Verizon iPhone. I guess it really depends where you are in the country.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
Well of course this only works on CDMA devices... That's what a PRL is for; CDMA devices.
P.S. Tell your friend to update his Profile and PRL by going into the settings and he'll get reception.
---------- Post added at 11:40 AM ---------- Previous post was at 11:39 AM ----------
LLStarks said:
CDMA Workshop costs money.
I can't do this with QPST?
Click to expand...
Click to collapse
I'm not sure if my PM sent or not. It's being very "buggy" I'll just post it here:
How to Update PRL Manually:
You must have your respected device's drivers installed prior to starting.
1. Download and Install QPST
2. Open QPST Configuration in the "QPST" folder under Programs
3. Disable debugging on your device
4. Open your phone's dialer and type *#7284#"
5. Switch to "CP" or "Modem"
6. Plug in your device to the computer
7. Click on the “Ports” tab and “Add a new port”
8. Select the “COMXX – USB\QC Diagnostic” and click ok. If you don’t see a port, uncheck the box for "Show Serial and USB/QC Diagnostic ports only" and add all of the USB/Unknown ports. One of them should show an active phone.
9. Click “Start Clients” on the top of the program and open Service Programming
10. Select your device
11. Click "Read from Phone" and enter "000000" (or your MSL if 0000000 doesn't work)
12. Click the "Roam" tab
13. Click "Browse" and select the PRL you wish to use
14. Click "Write to Phone"
Phone should reboot with the PRL you specified

StrumerJohn said:
Well of course this only works on CDMA devices... That's what a PRL is for; CDMA devices.
P.S. Tell your friend to update his Profile and PRL by going into the settings and he'll get reception.
---------- Post added at 11:40 AM ---------- Previous post was at 11:39 AM ----------
I'm not sure if my PM sent or not. It's being very "buggy" I'll just post it here:
How to Update PRL Manually:
You must have your respected device's drivers installed prior to starting.
1. Download and Install QPST
2. Open QPST Configuration in the "QPST" folder under Programs
3. Disable debugging on your device
4. Open your phone's dialer and type *#7284#"
5. Switch to "CP" or "Modem"
6. Plug in your device to the computer
7. Click on the “Ports” tab and “Add a new port”
8. Select the “COMXX – USB\QC Diagnostic” and click ok. If you don’t see a port, uncheck the box for "Show Serial and USB/QC Diagnostic ports only" and add all of the USB/Unknown ports. One of them should show an active phone.
9. Click “Start Clients” on the top of the program and open Service Programming
10. Select your device
11. Click "Read from Phone" and enter "000000" (or your MSL if 0000000 doesn't work)
12. Click the "Roam" tab
13. Click "Browse" and select the PRL you wish to use
14. Click "Write to Phone"
Phone should reboot with the PRL you specified
Click to expand...
Click to collapse
I couldn't get QPST to recognize the phone no matter what I did, so I used CDMA Workshop. You should be able to find a free (legal) “demo" version of it online.
And he updated his PRL before we left Las Vegas to see the national parks, he still had no service while I had about 5 or 6 bars.
Although most of the places I'm going to out here have no service for all carriers from what I've seen lol.
Sent from my SPH-L710 using xda app-developers app

elfhater said:
I couldn't get QPST to recognize the phone no matter what I did, so I used CDMA Workshop. You should be able to find a free (legal) “demo" version of it online.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
Should work with QPST. I've never had an issue with the program itself not recognizing anything.
What are you running Linux or Windows?
I'd just install Kies and to be safe also install the drivers online. Then read step 8. A LOT of people were freaking out over nothing.

I'm not sure this is quite relevant in either carrier's LTE space, as PRL updates are now handled automatically when the LTE radio activates (it's how GSM does things, and LTE is a GSM derivative).
For example, on Verizon LTE phones, *228 does nothing at best and smokes your SIM at worst. In most cases, getting a PRL update is nothing more than just rebooting your phone.

StrumerJohn said:
Should work with QPST. I've never had an issue with the program itself not recognizing anything.
What are you running Linux or Windows?
I'd just install Kies and to be safe also install the drivers online. Then read step 8. A LOT of people were freaking out over nothing.
Click to expand...
Click to collapse
I'm using Windows; the program recognizes it in a COM port but can't determine the device and won't let me edit anything for the phone as a result.
I never had a problem with my Epic 4g, but for some reason this phone just won't work for me.
Sent from my SPH-L710 using xda app-developers app

AlexDeGruven said:
I'm not sure this is quite relevant in either carrier's LTE space, as PRL updates are now handled automatically when the LTE radio activates (it's how GSM does things, and LTE is a GSM derivative).
For example, on Verizon LTE phones, *228 does nothing at best and smokes your SIM at worst. In most cases, getting a PRL update is nothing more than just rebooting your phone.
Click to expand...
Click to collapse
+1 Another reason why I was wondering why people want to flash different PRLs on it.

StrumerJohn said:
+1 Another reason why I was wondering why people want to flash different PRLs on it.
Click to expand...
Click to collapse
The PRL I'm referring to only affects CDMA coverage. This method only refers to a method changing the CDMA roaming, as there is no LTE roaming anyway (and no need for PRLs).
I mean I could be wrong about this since this is Verizon and I'm referring to things I know from Sprint LTE phones, but I know (almost for sure) CDMA roaming is still relevant because voice and texts require CDMA coverage.
Sent from my SPH-L710 using xda app-developers app

When using QPST, Generic CDMA is sometimes sufficient to do simple tasks.

elfhater said:
The PRL I'm referring to only affects CDMA coverage. This method only refers to a method changing the CDMA roaming, as there is no LTE roaming anyway (and no need for PRLs).
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
Yes and the PRL affects CDMA coverage. Unless you never reboot your phone, flashing PRLs would be sort of useless, unless your in the one spot in the whole country Verizon doesn't cover.

StrumerJohn said:
Yes and the PRL affects CDMA coverage. Unless you never reboot your phone, flashing PRLs would be sort of useless, unless your in the one spot in the whole country Verizon doesn't cover.
Click to expand...
Click to collapse
But the newest PRLs are not always the best PRLs. I know on Sprint that sometimes people will report better coverage using an older PRL, so flashing an older/modified PRL could be beneficial.
Sent from my SPH-L710 using xda app-developers app

Thread opened. Thread in general closed.
Thanks
FNM

I will be updating the OP when I get back from vacation around the 15th.
Thank you for your patience!
Sent from my SPH-L710 using xda app-developers app

elfhater said:
I'm using Windows; the program recognizes it in a COM port but can't determine the device and won't let me edit anything for the phone as a result.
I never had a problem with my Epic 4g, but for some reason this phone just won't work for me.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
Update your apps qxdm and qpst cause it work fine.

StrumerJohn said:
Yes and the PRL affects CDMA coverage. Unless you never reboot your phone, flashing PRLs would be sort of useless, unless your in the one spot in the whole country Verizon doesn't cover.
Click to expand...
Click to collapse
Im in the one spot tgat no lte is available.. cocoa beach florida
Sent from my SCH-I535 using Tapatalk 2

[Q] Unable to connect 3g or 4g

I have the chinese version of the opo and i'm having issues connecting to the any 3g or 4g, i just get EDGE. I've tried cyanogenmod m9, latest nightly and colorOS which came with the phone. Has anyone had similar issues?. I've got a friend that has the same phone, same carrier, but gets 3g and 4g.

What part of the world are you in? What carrier are you on?
Are you connected to the right APN?

maybe you sim card no support 4g
Sent from my ZTE N909 using XDA Free mobile app
---------- Post added at 09:11 PM ---------- Previous post was at 09:09 PM ----------
maybe *#*#4636#*#*
Sent from my ZTE N909 using XDA Free mobile app

kevinlanyou said:
maybe you sim card no support 4g
Sent from my ZTE N909 using XDA Free mobile app
---------- Post added at 09:11 PM ---------- Previous post was at 09:09 PM ----------
maybe *#*#4636#*#*
Sent from my ZTE N909 using XDA Free mobile app
Click to expand...
Click to collapse
His SIM card should still at least support 3G. We're not sure whether or not OP lives in USA or whatnot.
He does have the Chinese version which is incapable of getting LTE speeds on U.S. carriers.

zephiK said:
His SIM card should still at least support 3G. We're not sure whether or not OP lives in USA or whatnot.
He does have the Chinese version which is incapable of getting LTE speeds on U.S. carriers.
Click to expand...
Click to collapse
Hey, so i went to work today, and had 3g and 4g while at work, it seems i just can't get 3g in my house, it's not a huge issue cause i can just use wifi, just seems weird.
Edit:i get 3g with my old phone though in my room.

Ziglez said:
Hey, so i went to work today, and had 3g and 4g while at work, it seems i just can't get 3g in my house, it's not a huge issue cause i can just use wifi, just seems weird.
Edit:i get 3g with my old phone though in my room.
Click to expand...
Click to collapse
Ah so its just a carrier problem not providing 3g/4g in your house. See if you can get a signal booster or something of that sort?
I was hoping with the 30O update there would be a baseband update but there wasn't.

zephiK said:
Ah so its just a carrier problem not providing 3g/4g in your house. See if you can get a signal booster or something of that sort?
I was hoping with the 30O update there would be a baseband update but there wasn't.
Click to expand...
Click to collapse
It's fine for now, i have wifi, I could change to a carrier that has better 4g support, i know they have a 4g tower nearby, but Australia carriers are terrible.
Thanks for the responses though.

Now i have an issue, i'm getting drop outs, not just the 3g, but my signal will just drop out. I know some people fixed this with the latest modem from m8. But i flashed it, didn't seem to change anything.

Haven't seen LTE on Note 5

I initially thought there was a change in the coding for the 4G icon. But I've been checking since I got my Note 5 and I am not getting LTE. I upgraded from a GS6 edge that had LTE everywhere, home, work, and surrounding areas. But I have yet to see the LTE signal on my Note 5. Anyone else having this issue? Or have any idea as to how to fix this?

Droidz said:
I initially thought there was a change in the coding for the 4G icon. But I've been checking since I got my Note 5 and I am not getting LTE. I upgraded from a GS6 edge that had LTE everywhere, home, work, and surrounding areas. But I have yet to see the LTE signal on my Note 5. Anyone else having this issue? Or have any idea as to how to fix this?
Click to expand...
Click to collapse
Is this a T-Mobile branded GN5 or a different version? Have you taken it to T-Mobile and asked them to see what the deal is? Can you post a pic of your APN Settings please?

Yeah got it from T-Mobile store. Haven't spoken to T-Mobile yet, XDA is my first place to go. Also added pic, scroll capture ftw!

Droidz said:
Yeah got it from T-Mobile store. Haven't spoken to T-Mobile yet, XDA is my first place to go. Also added pic, scroll capture ftw!
Click to expand...
Click to collapse
What is your Network Mode on?
---------- Post added at 06:47 PM ---------- Previous post was at 06:36 PM ----------
Your network mode should be LTE/3G/2G (auto connect)

iScott78 said:
What is your Network Mode on?
---------- Post added at 06:47 PM ---------- Previous post was at 06:36 PM ----------
Your network mode should be LTE/3G/2G (auto connect)
Click to expand...
Click to collapse
Attached another pic.

Sounds like a faulty LTE antenna. I'd be taking it back to the store.
Sent from my LG-H811 using Tapatalk

Going to go ahead and take it to the store tomorrow. I'll update you guys on how it goes. Thanks a million for such quick replies.

Droidz said:
Going to go ahead and take it to the store tomorrow. I'll update you guys on how it goes. Thanks a million for such quick replies.
Click to expand...
Click to collapse
I would go ahead and do a factory reset first then if you aren't getting LTE take it back. Might save you some time.

iScott78 said:
I would go ahead and do a factory reset first then if you aren't getting LTE take it back. Might save you some time.
Click to expand...
Click to collapse
It was the Sim card. Went to T-mobile store and they explained is a known issue when upgrading to any new phones Note 5 and beyond they have more information to handle new network features.

Glad you got it worked out. If you're paying for data might as well get the most out of it

t series custom rom question

Can we flash the other roms listed to our phones or are the roms too different? I still haven't figured out the differences in all the models yet. (yeah I'm not to bright)

alarmdude9 said:
Can we flash the other roms listed to our phones or are the roms too different? I still haven't figured out the differences in all the models yet. (yeah I'm not to bright)
Click to expand...
Click to collapse
They must be for j700t or j700t1. Almost all other j7 variants either have 1.5gb ram or different radios.
-sent from this device using this app.

That's kinda what I thought but wanted to get it right in my head as well as putting it out there nice and plain for everyone else.
Sent from my SM-J700T using XDA Free mobile app

Well. A sprint rom would work on boost mobile and virgin mobile youd just need the stock apn settings or a apn fix zip.. not sure about tmobile unless they made metro pcs just like tmobile where youd just need a apn fix for the rom like how sprint is with boost mobile and virgin mobile.

CoffeeNAndroid said:
Well. A sprint rom would work on boost mobile and virgin mobile youd just need the stock apn settings or a apn fix zip.. not sure about tmobile unless they made metro pcs just like tmobile where youd just need a apn fix for the rom like how sprint is with boost mobile and virgin mobile.
Click to expand...
Click to collapse
Apn settings aren't really an issue. Look them up online.
What I was referring to was the variants that have 3g or 4g only. No LTE or designed with a certain region in mind so certain bands aren't even there.
For the record, I don't truly believe the ram differences matter but it's Samsung. You never know.
sent from tha interwebs on dis here device.

http://androidforums.com/threads/bo...al-boost-apn-fix-for-d2lte-builds-mod.840501/
It would be something like this but not all apns are listed online my apn for boost mobile is not listed anywhere online and i cant get the apn settings to show me what the info is so i would need a apn fix to flash right after flashing a sprint rom... if youre trying to get 4g in a area with no 4g the only way to do that would be to have a unlocked phone and switch to the carrier who has 4g lte... if theres no 4g lte towers then it will be impossible to actually get a 4g signal...

https://www.google.com/search?q=apn...ms-tmobile-us&sourceid=chrome-mobile&ie=UTF-8
sent from tha interwebs on dis here device.
---------- Post added at 04:28 PM ---------- Previous post was at 04:11 PM ----------
CoffeeNAndroid said:
http://androidforums.com/threads/bo...al-boost-apn-fix-for-d2lte-builds-mod.840501/
It would be something like this but not all apns are listed online my apn for boost mobile is not listed anywhere online and i cant get the apn settings to show me what the info is so i would need a apn fix to flash right after flashing a sprint rom... if youre trying to get 4g in a area with no 4g the only way to do that would be to have a unlocked phone and switch to the carrier who has 4g lte... if theres no 4g lte towers then it will be impossible to actually get a 4g signal...
Click to expand...
Click to collapse
You're partially right in that if there are no LTE towers then you won't get LTE.
If there is a tower, then all carriers are able to use it according to the FCC.
I'm talking about the modem and the firmware on the device itself. Some have LTE without certain bands enabled. Some have 4g (3.5g+ otherwise known as fauxgee) and there are some with only 3g.
If you start messing with flashing modems, you're risking a brick situation.
Original question here had to do with flashing roms designed for other j7 variants was okay for j700t(1).
I say no because of the above reasons I gave.
I say wait. Roms are coming for the T and T1.
sent from tha interwebs on dis here device.

No data during calls?

Hi Guys,
I'm using the US Mate 9 with AT&T, a GSM provider. I noticed when I'm on a call either there is no data (Internet) available or very patchy with the screen on...
Wanted to ask you guys if this is normal and expected behavior?
Thanks!

I dont think is normal, I've seen icon change from 4g to 3g to H+ when I'm on calls but still able to open facebook,whatsapp or firefox while calling. I'm with Tmo tho.

ProFragger said:
Hi Guys,
I'm using the US Mate 9 with AT&T, a GSM provider. I noticed when I'm on a call either there is no data (Internet) available or very patchy with the screen on...
Wanted to ask you guys if this is normal and expected behavior?
Thanks!
Click to expand...
Click to collapse
It's because At&t doesn't allow VoLTE on the Mate 9 so when you make a call you get dropped to 4g or 3g speeds. T-Mobile allows VoLTE so data doesn't change due to a call. I run both sims in mine and it's why I keep my personal line on T-Mobile and use it's data. My At&t line is strictly for work calls.
Sent from my MHA-L29 using Tapatalk

ilbambino said:
I dont think is normal, I've seen icon change from 4g to 3g to H+ when I'm on calls but still able to open facebook,whatsapp or firefox while calling. I'm with Tmo tho.
Click to expand...
Click to collapse
wingzfan said:
It's because At&t doesn't allow VoLTE on the Mate 9 so when you make a call you get dropped to 4g or 3g speeds. T-Mobile allows VoLTE so data doesn't change due to a call. I run both sims in mine and it's why I keep my personal line on T-Mobile and use it's data. My At&t line is strictly for work calls.
Sent from my MHA-L29 using Tapatalk
Click to expand...
Click to collapse
Thanks for your responses guys... In all my years of using all these different phones on AT&T, I've never ever noticed this since the Verizon days. I'll take the degraded 3G or H+, but yesterday it went straight to no data. Do you guys think I need an adjustment in my APN or is it a buried setting somewhere to fix it?
Thanks!

ProFragger said:
Thanks for your responses guys... In all my years of using all these different phones on AT&T, I've never ever noticed this since the Verizon days. I'll take the degraded 3G or H+, but yesterday it went straight to no data. Do you guys think I need an adjustment in my APN or is it a buried setting somewhere to fix it?
Thanks!
Click to expand...
Click to collapse
I didn't adjust anything with my At&t sim so I don't think you should need to either. Also this is a brand new sim and number so it was never in a different phone. I know on my Axon I had to put it in my iPhone first to get it working properly but not this phone. Are you in a good coverage area?
Sent from my MHA-L29 using Tapatalk

Are you sure about this device not doing VoLTE.
Sent from my MHA-L29 using XDA-Developers Legacy app

ekerbuddyeker said:
Are you sure about this device not doing VoLTE.
Sent from my MHA-L29 using XDA-Developers Legacy app
Click to expand...
Click to collapse
The device does VoLTE, At&t however isnt allowing it on the device. I can switch my data to my At&t sim and take a screen shot and back to T-Mobile and take one if need be.
---------- Post added at 09:20 AM ---------- Previous post was at 09:11 AM ----------
I notice after the update today the "HD" icon next to the call timer is gone. That sucks.
Sent from my MHA-L29 using Tapatalk

wingzfan said:
The device does VoLTE, At&t however isnt allowing it on the device. I can switch my data to my At&t sim and take a screen shot and back to T-Mobile and take one if need be.
---------- Post added at 09:20 AM ---------- Previous post was at 09:11 AM ----------
I notice after the update today the "HD" icon next to the call timer is gone. That sucks.
Sent from my MHA-L29 using Tapatalk
Click to expand...
Click to collapse
Is the 4GLTE icon for Tmobile? I dont get to show the LTE letters but only 4G in mine, probably because is the Chinese version.

ilbambino said:
Is the 4GLTE icon for Tmobile? I dont get to show the LTE letters but only 4G in mine, probably because is the Chinese version.
Click to expand...
Click to collapse
Both At&t and T-Mobile show 4gLTE icons but At&t's drops to 4g only while in a call, T-Mobiles stays 4gLTE which verifies VoLTE only works on T-Mobile.
I believe you're correct and the Chinese variant doesnt show LTE.

[SOLVED]
Guys, thanks for all your helpful responses! Just to close the loop on the issue of *NO DATA* during calls was fixed with the check box, checked in the attachment.
Although, as shared here, it's possible that it's H+ or 3G only service, not true LTE.
Thanks!

Alternative Solution
I had the same problem, I found out that this box was already checked on my phone, What fixed it for me was checking Mobile Network -> Access Point Names> selecting "ATT Phone"
I had initially selected "ATT Nextgenphone."
ProFragger said:
Guys, thanks for all your helpful responses! Just to close the loop on the issue of *NO DATA* during calls was fixed with the check box, checked in the attachment.
Although, as shared here, it's possible that it's H+ or 3G only service, not true LTE.
Thanks!
Click to expand...
Click to collapse

Oladi_Olada said:
I had the same problem, I found out that this box was already checked on my phone, What fixed it for me was checking Mobile Network -> Access Point Names> selecting "ATT Phone"
I had initially selected "ATT Nextgenphone."
Click to expand...
Click to collapse
Ah! Good tip bud!