[UPDATE: 4/2/12] PRL Information Thread

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Whosdaman

Inactive Recognized Developer
May 9, 2008
5,673
1,408
Gainesville, Florida
Before I go into the full details of the project, let's go over what a PRL is, what it does, and why it matters to you.

What Really is a PRL?

"The Preferred Roaming List (PRL) is a database residing in a wireless (primarily CDMA) device, such as a cellphone, that contains information used during the system selection and acquisition process. In the case of R-UIM-based CDMA devices, the PRL resides on the R-UIM. The PRL indicates which bands, sub bands and service provider identifiers will be scanned and in what priority order. Without a PRL, the device may not be able to roam, i.e. obtain service outside of the home area. There may be cases where missing or corrupt PRL's can lead to a customer not having service at all.

On many networks, regularly updating the PRL is advised if the subscriber uses the device outside the home area frequently, particularly if they do so in multiple different areas. This allows the phone to choose the best roaming carriers, particularly "roaming partners" with whom the home carrier has a cost-saving roaming agreement, rather than using non-affiliated carriers. PRL files can also be used to identify home networks along with roaming partners, thus making the PRL an actual list that determines the total coverage of the subscriber, both home and roaming coverage."

Source: Wikipedia

TLDR: The PRL tells a device what towers to connect to, which frequency to search on, and in what order to connect to them. This includes "on" and "off" network towers. PRLs do not effect 4G WiMax performance.

Why Should I Care?

The PRL directly effects the coverage you receive and the data speed performance of your device. Ensuring you have the latest PRL is critical to maintaining the best signal your device will get. However, there are a few "special" PRLs we can use in order to gain access to hidden features, such as 3G data roaming.

So What is This About?

I'm glad you asked. I've been working on this for a few months now and I'm now ready to go public in order to gain more statistical data from my fellow peers. I have a collection of PRLs that I have rigorously tested to see which ones give me the best performance. This isn't enough. I need real world testing for as many members as I can get.

While I can't give the full details of my project away yet, let me assure you it will benefit everyone on Sprint. Phase 1 of my project has already started and here is how you can contribute:

https://docs.google.com/spreadsheet/ccc?key=0ArqBGjrbNosddGR3OURoNnJLdTlTaEo1RmVEYjdVNlE

The above document is open to everyone and can be edited by everyone. This spreadsheet will be used to compile data from everyone's usage of the PRLs available to us. Check the bottom of the file for sheet of each individual PRL. Each one has it's own sheet. Just add your data for which ever PRL you are testing.

The tool accepted for measuring data speed is Speedtest.net. They are the industries leader in speed testing, and it is a very reliable application.

If the PRL you are testing isn't there, I have included a template sheet so you can make your own sheet. Please stick to the format and be honest. This project is for everyone to benefit from, so don't ruin it for anyone. Also be sure you are adding your raw data to the correct PRL sheet. Little mistake like that can skew the data. Please test "Home" and "Roam" equally, I am trying to obtain the best performing PRL overall. I want to repeat that 4G WiMax is not effected by PRL, so do not include 4G in your testing.

Be impartial, be true, be consistent, and most of all be precise. If you notice something is wrong, fix it. You can chat inside the document. Just check the top right hand side for the people viewing the document. I will check this document often and update it regularly.

I have included the primary PRLs for testing in the 2nd post, and instructions how to manually update your PRL from a PC in the 3rd post. If you have any questions, please feel free to ask away.

[UPDATE: 3/4/12]
- Closed private testing
- Added ##3432# to 3rd post

[UPDATE: 3/6/12]
- Revised 3rd Post
- Added Nexus S 4G support
- Added Disclaimer to 2nd Post about Network Vision PRLs

[UPDATE: 4/2/12]
- Phase 1 of private testing is through. Haven't posted results yet
- Added new updated version of PRLs in 2nd post
- Updated guides in 3rd post
 
Last edited:

Whosdaman

Inactive Recognized Developer
May 9, 2008
5,673
1,408
Gainesville, Florida
PRL Information

Mobile Broadband Corporate Sprint PRL
- 11115 (Outdated)
- 11117 (Outdated)
- 11119

Mobile Broadband Corporate Sprint PRL for Network Vision*
- 12117 (Outdated)
- 12119

Corporate Sprint PRL
- 61085

Corporate Sprint PRL for Network Vision*
- 22085

Sprint PRL for Network Vision*
- 21083 (Outdated)
- 21085 (Outdated)
- 21086

Sprint PRL
- 60683 (Outdated)
- 60685 (Outdated)
- 60686

Modified Verizon PRL
- 00001 (Outdated)
- 00002

* If your device is not a "Network Vision Ready" device, these PRLs will not change that fact. It does not hurt to test these as they might improve the performance of your device.
 

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  • 61085.zip
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Last edited:

Whosdaman

Inactive Recognized Developer
May 9, 2008
5,673
1,408
Gainesville, Florida
How to Update PRL Manually:

You must have your respected device's drivers installed prior to starting.

  1. Download and Install QPST 2.7 - Build 366
  2. Open QPST Configuration in the "QPST" folder under Programs
  3. Disable debugging on your device
  4. Type one of the following codes in you respected device's dialer and switch to "CP" or "Modem"
    • Epic 4G Touch: ##8778#
    • HTC EVO 3D: ##3424#
    • Nexus S 4G: *#*#8778#*#*
  5. Plug in your device
  6. Click on the “Ports” tab and “Add a new port”
  7. 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.
  8. Click “Start Clients” on the top of the program and open Service Programming
  9. Select your device
  10. Click "Read from Phone" and enter "000000"
  11. Click the "Roam" tab
  12. Click "Browse" and select the PRL you wish to use
  13. Click "Write to Phone"
  14. Phone should reboot with the PRL you specified

How to Pull PRL From Device:

You must have your respected device's drivers installed prior to starting.

  1. Download and Install QPST 2.7 - Build 366
  2. Open QPST Configuration in the "QPST" folder under Programs
  3. Disable debugging on your device
  4. Type one of the following codes in you respected device's dialer and switch to "CP" or "Modem"
    • Epic 4G Touch: ##8778#
    • HTC EVO 3D: ##3424#
    • Nexus S 4G: *#*#8778#*#*
  5. Plug in your device
  6. Click on the “Ports” tab and “Add a new port”
  7. 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.
  8. Click “Start Clients” on the top of the program and open Service Programming
  9. Select your device
  10. Click "Read from Phone" and enter "000000" or your MSL
  11. Click "Save to File" and save the file
  12. Open RL Editor in the QPST folder
  13. Go to "File" then "Open" and navigate to the location where you saved the file
  14. Open the .r0l file
  15. Go to "File" then "Save As" and save the file as a .prl file type.

If either are unclear in any way, please let me know.
 
Last edited:

Whosdaman

Inactive Recognized Developer
May 9, 2008
5,673
1,408
Gainesville, Florida
What are your opinions on 12117? I am interested in this one.

So far it hasn't performed like I expected. I believe this is due to our devices not being Network Vision ready. Originally it was reported and displayed that it was tested for the 800 MHz band, but I guess that was a lie. I do not think the 800 MHz band can be disabled by software. This makes sense since we have the regular PRL's like all the other devices.

So far 60683 performs the best on network. If you roam a lot, the 11115 seems to be the way to go, that way you can flip between roaming and home network with Roam Control.
 

Whosdaman

Inactive Recognized Developer
May 9, 2008
5,673
1,408
Gainesville, Florida
Yes way out here in the country 1115 has worked best for me. Thanks.

Feel free to test the 12117 though! You never know what you may get in performance. Maybe it really does work and our device can pick up the 800 MHz frequency? Maybe during the time of testing 12117 didn't perform like it should have due to variables.

Like I said, I have multiple tests I still need to run, then I can move on to phase 2.
 

krazyflipj

Senior Member
Jan 14, 2008
2,827
440
Been running 11115 for awhile. Definitely get best of both worlds

Sent from my Epic Galaxy S2
 

nibrwr

Senior Member
Dec 20, 2010
1,352
286
Oklahoma
Running 11115 PRL here. I get exceptional roaming data rates, and very good home network data rates. Coupled with Roam Control for network access at work, 11115 PRL is best for me.

Thanks Korey for all your work.
 

cds0699

Senior Member
May 12, 2011
902
128
Shenandoah Junction WV
Wouldn't it make more sense to do the tests at morning/afternoon/night on separate days, then take the average from there? I think that would be a more well rounded test.
 

scarmon25

Senior Member
Feb 18, 2011
5,689
2,159
Knoxville, TN
11115 has been the best for me by far. Alot of the places I go I end up roaming. Paired with Roam Control I can switch it over to roaming and get Data when I need it. I don't run it like that all the time but when I do force it so roam I get nice 3G speeds.
 

ejlmd

Senior Member
Jan 11, 2009
238
33
Northern New Jersey
I've tested 11115 multiple times with latest version of Roam Control, in Northern New Jersey. I only get 1x Verizon data speeds, no matter what, including the typical long latencies (~900ms).

With 9999 I get robust 3G Verizon data, but doesn't roam back onto Sprint when there is poor Verizon coverage.

Ideal would be something akin to 9999 but with roaming back onto Sprint network when needed.
 

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  • 43
    Before I go into the full details of the project, let's go over what a PRL is, what it does, and why it matters to you.

    What Really is a PRL?

    "The Preferred Roaming List (PRL) is a database residing in a wireless (primarily CDMA) device, such as a cellphone, that contains information used during the system selection and acquisition process. In the case of R-UIM-based CDMA devices, the PRL resides on the R-UIM. The PRL indicates which bands, sub bands and service provider identifiers will be scanned and in what priority order. Without a PRL, the device may not be able to roam, i.e. obtain service outside of the home area. There may be cases where missing or corrupt PRL's can lead to a customer not having service at all.

    On many networks, regularly updating the PRL is advised if the subscriber uses the device outside the home area frequently, particularly if they do so in multiple different areas. This allows the phone to choose the best roaming carriers, particularly "roaming partners" with whom the home carrier has a cost-saving roaming agreement, rather than using non-affiliated carriers. PRL files can also be used to identify home networks along with roaming partners, thus making the PRL an actual list that determines the total coverage of the subscriber, both home and roaming coverage."

    Source: Wikipedia

    TLDR: The PRL tells a device what towers to connect to, which frequency to search on, and in what order to connect to them. This includes "on" and "off" network towers. PRLs do not effect 4G WiMax performance.

    Why Should I Care?

    The PRL directly effects the coverage you receive and the data speed performance of your device. Ensuring you have the latest PRL is critical to maintaining the best signal your device will get. However, there are a few "special" PRLs we can use in order to gain access to hidden features, such as 3G data roaming.

    So What is This About?

    I'm glad you asked. I've been working on this for a few months now and I'm now ready to go public in order to gain more statistical data from my fellow peers. I have a collection of PRLs that I have rigorously tested to see which ones give me the best performance. This isn't enough. I need real world testing for as many members as I can get.

    While I can't give the full details of my project away yet, let me assure you it will benefit everyone on Sprint. Phase 1 of my project has already started and here is how you can contribute:

    https://docs.google.com/spreadsheet/ccc?key=0ArqBGjrbNosddGR3OURoNnJLdTlTaEo1RmVEYjdVNlE

    The above document is open to everyone and can be edited by everyone. This spreadsheet will be used to compile data from everyone's usage of the PRLs available to us. Check the bottom of the file for sheet of each individual PRL. Each one has it's own sheet. Just add your data for which ever PRL you are testing.

    The tool accepted for measuring data speed is Speedtest.net. They are the industries leader in speed testing, and it is a very reliable application.

    If the PRL you are testing isn't there, I have included a template sheet so you can make your own sheet. Please stick to the format and be honest. This project is for everyone to benefit from, so don't ruin it for anyone. Also be sure you are adding your raw data to the correct PRL sheet. Little mistake like that can skew the data. Please test "Home" and "Roam" equally, I am trying to obtain the best performing PRL overall. I want to repeat that 4G WiMax is not effected by PRL, so do not include 4G in your testing.

    Be impartial, be true, be consistent, and most of all be precise. If you notice something is wrong, fix it. You can chat inside the document. Just check the top right hand side for the people viewing the document. I will check this document often and update it regularly.

    I have included the primary PRLs for testing in the 2nd post, and instructions how to manually update your PRL from a PC in the 3rd post. If you have any questions, please feel free to ask away.

    [UPDATE: 3/4/12]
    - Closed private testing
    - Added ##3432# to 3rd post

    [UPDATE: 3/6/12]
    - Revised 3rd Post
    - Added Nexus S 4G support
    - Added Disclaimer to 2nd Post about Network Vision PRLs

    [UPDATE: 4/2/12]
    - Phase 1 of private testing is through. Haven't posted results yet
    - Added new updated version of PRLs in 2nd post
    - Updated guides in 3rd post
    19
    PRL Information

    Mobile Broadband Corporate Sprint PRL
    - 11115 (Outdated)
    - 11117 (Outdated)
    - 11119

    Mobile Broadband Corporate Sprint PRL for Network Vision*
    - 12117 (Outdated)
    - 12119

    Corporate Sprint PRL
    - 61085

    Corporate Sprint PRL for Network Vision*
    - 22085

    Sprint PRL for Network Vision*
    - 21083 (Outdated)
    - 21085 (Outdated)
    - 21086

    Sprint PRL
    - 60683 (Outdated)
    - 60685 (Outdated)
    - 60686

    Modified Verizon PRL
    - 00001 (Outdated)
    - 00002

    * If your device is not a "Network Vision Ready" device, these PRLs will not change that fact. It does not hurt to test these as they might improve the performance of your device.
    15
    How to Update PRL Manually:

    You must have your respected device's drivers installed prior to starting.

    1. Download and Install QPST 2.7 - Build 366
    2. Open QPST Configuration in the "QPST" folder under Programs
    3. Disable debugging on your device
    4. Type one of the following codes in you respected device's dialer and switch to "CP" or "Modem"
      • Epic 4G Touch: ##8778#
      • HTC EVO 3D: ##3424#
      • Nexus S 4G: *#*#8778#*#*
    5. Plug in your device
    6. Click on the “Ports” tab and “Add a new port”
    7. 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.
    8. Click “Start Clients” on the top of the program and open Service Programming
    9. Select your device
    10. Click "Read from Phone" and enter "000000"
    11. Click the "Roam" tab
    12. Click "Browse" and select the PRL you wish to use
    13. Click "Write to Phone"
    14. Phone should reboot with the PRL you specified

    How to Pull PRL From Device:

    You must have your respected device's drivers installed prior to starting.

    1. Download and Install QPST 2.7 - Build 366
    2. Open QPST Configuration in the "QPST" folder under Programs
    3. Disable debugging on your device
    4. Type one of the following codes in you respected device's dialer and switch to "CP" or "Modem"
      • Epic 4G Touch: ##8778#
      • HTC EVO 3D: ##3424#
      • Nexus S 4G: *#*#8778#*#*
    5. Plug in your device
    6. Click on the “Ports” tab and “Add a new port”
    7. 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.
    8. Click “Start Clients” on the top of the program and open Service Programming
    9. Select your device
    10. Click "Read from Phone" and enter "000000" or your MSL
    11. Click "Save to File" and save the file
    12. Open RL Editor in the QPST folder
    13. Go to "File" then "Open" and navigate to the location where you saved the file
    14. Open the .r0l file
    15. Go to "File" then "Save As" and save the file as a .prl file type.

    If either are unclear in any way, please let me know.
    6
    Okay to be honest, the reason why I haven't updated this thread and continued the project is due to internal training and information I have received about Sprint. In the next 6 months to a year, Sprint will be producing more PRL's than it has ever made total due to the constant changes to the towers by Network Vision.

    It is very very important that everyone stay on the latest PRL as much as possible to ensure they do not miss out on the updated coverage. These corporate PRLs are great and all, but if we can't keep up with them, it is better to stick with the latest "stock" PRL than the CL PRLs. There are so many changes coming to Sprint and their network it is unbelievable. So much so that it is extremely hard for me to go over every single one of them in just one post.

    One thing I have seen that PRL will affect the most is coverage. I have seen an internal coverage map from Sprint for their on-network 3G and 4G data/voice network and it is beautiful. The coverage map has a larger footprint than Verizon currently has. Along with the increased coverage, Sprint is also upgrading the capacities on all of their towers to handle the excessive strain on the towers. This is going to increase data speeds for everyone. As well the additional 800MHz spectrum will bring even better data speeds to those of you who can handle the 800MHz frequency.

    In absolute honesty, if you have been with Sprint for this long and put up with them, you might as well put up with them for 1 more year, because it is getting nothing but better. Even here in my home town, Lake City, Florida, where Nextel dominates. They are already starting work on the towers to equip them with the new Network Vision equipment and evaluating which Nextel towers to keep. I'll fill everyone in more as I get more information, but as it stands right now Sprint is the worst it'll ever be. It is only going to get much better from here. By the end of this year, we are on pace to surpass AT&T in LTE coverage and cities supported.
    5
    11121 PRL pulled from my Epic 4g touch....