Database Info

Data fluctuations

Over the past 2 weeks my data will drop all the way down to G or E and when I open up a webpage I get an error that says no internet is available. I have to refresh the page a few times for H to show and display the page. I live outside a major city and I don't recall this happening when I purchased the phone. Right now I'm stock rooted, any ideas what may be causing this? I looked through the settings but nothing stood out that I could change.
Sent from my SAMSUNG-SGH-I997 using xda premium

I have this Problem ALL the time......i lose connection and have to toggle airplane mode to get it to come back. ON ANY ROM, ANY KERNEL, or MODEM
I think its the INFUSE.

^ really? How in all of hell would hardware cause a problem with network dropping out when a specific app is doing a specific task? It's AT&T's disgusting froyo ROM and kernel messing it up.

Im just telling you, that on Stock or Custom roms i have this issue.
i have had this issue with this phone since i opened it, and i have already returned it for another one, with the same issue.
not saying i lose it all the time, but at least twice a day and it Does not come back unless i reboot or toggle airplane mode.

i have HAD this issue. i fixed it by forcing the phone on to the 3G network.
>settings>wireless and network>mobile networks> network mode? WCDMA only.
fixed my issues, but you have to set it after every reboot.
if you dont see the option try from the dial pad *#*#4636#*#* and go to >Phone Information>scroll down and set preferred network type to WCDMA only

Optimus-Prime said:
i have HAD this issue. i fixed it by forcing the phone on to the 3G network.
>settings>wireless and network>mobile networks> network mode? WCDMA only.
fixed my issues, but you have to set it after every reboot.
if you dont see the option try from the dial pad *#*#4636#*#* and go to >Phone Information>scroll down and set preferred network type to WCDMA only
Click to expand...
Click to collapse
Will Def give this a Try.....thanks for the info Prime.

the2rrell said:
Will Def give this a Try.....thanks for the info Prime.
Click to expand...
Click to collapse
yeah id be great if you can report back with a yes or a no.

i had to use the 4636 meathod to change that option.
but when i do this, it makes my time go to East Greenland Summer time....lol unless i leave off the Automatic setting.
will continue to test and see if i lose Carrier.

yeah some roms dont have the options i know infused. its a safer bet to do it from the dial pad.

Tried the 4636 method and that didn't help. I wonder if I should Odin back to stock again, I'm at a loss.
Sent from my SAMSUNG-SGH-I997 using xda premium

then its just location. because where im at my does that jump around on data but once i switch it its fine and stays connected.
ive seen this method work for any rom that i try.
dont reboot because that will put you in the same place as you started.

SGSII Has similar issue...
Hey All,
The SGSII (of which I own) has a similar issue with it. What needs to be done is to switch "off" Fast Dormancy of which the option can be found by dialing a specific code (*#9900#* i believe)...

Optimus-Prime said:
yeah id be great if you can report back with a yes or a no.
Click to expand...
Click to collapse
I have tried this, and it WORKS. i have not lost it yet.

It wont let me do the *#9900#*. As soon as I input the second # it takes me to an odd screen where I don't see that option
Sent from my SAMSUNG-SGH-I997 using xda premium

Sprint Nexus S 4g on Boost Mobile - Questions

I flashed my NS4G to Boost... it was a long and agonizing road, but I think i finally got it working correctly.
my phone is currently 100% stock with gingerbread 2.3.7
since this was such a stressful flash, i'm kind of worried about "not fixing what's not broken"...
however, i'd love to re-root it and flash a custom ROM. Will doing this mess up any of the modifications i had to do to get calls, text, and data to work?
(they were all done in QPST)
I'm not going to do it until i have confirmation... so let me know and ease my mind!
thanks
-Randy

i also have a nexus 4g on boost. i've just about had every kernal and rom on this board for it (both gingerbread and ICS)
i hope that helps.

jin5 said:
i also have a nexus 4g on boost. i've just about had every kernal and rom on this board for it (both gingerbread and ICS)
i hope that helps.
Click to expand...
Click to collapse
so a standard rom flash will retain all boost settings?

yes.
keep in mind mms fix only works on gingerbread as far as i know.
the APN can't be changed on ICS roms.

jin5 said:
yes.
keep in mind mms fix only works on gingerbread as far as i know.
the APN can't be changed on ICS roms.
Click to expand...
Click to collapse
If you use voice dialer and say "open APNs", it will let you edit the apn. Does this not work to get mms working?
Sent from my Nexus S 4g using Tapatalk

strra said:
If you use voice dialer and say "open APNs", it will let you edit the apn. Does this not work to get mms working?
Sent from my Nexus S 4g using Tapatalk
Click to expand...
Click to collapse
I made this change and the mms successfully sent. I'll ask my brother if he got it later and update you
Edit: my brother sent me a text saying he got the picture
Sent from my Nexus S 4g using Tapatalk

Wrong section. My bad... Sorry
Sent from my Nexus S 4g using Tapatalk

hey i have flashed lots of phone from eve's to epic touch, but for some reason i am unable to get the 3g to work on the nexus. I used an incognito as donor phone retrieve all the required info. By any chance can you tell me how you got your 3g to work?

nick cannon said:
hey i have flashed lots of phone from eve's to epic touch, but for some reason i am unable to get the 3g to work on the nexus. I used an incognito as donor phone retrieve all the required info. By any chance can you tell me how you got your 3g to work?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=891077
i followed this guide for 3G and MMS

strra said:
http://forum.xda-developers.com/showthread.php?t=891077
i followed this guide for 3G and MMS
Click to expand...
Click to collapse
i cant get that to work. as soon as i enter my password i loose my 3g icon?

Help me Help me PLEASE!!!
Please Help, I have been all over Google and multiple forums and cant find out how to flash my phone to boost. I have a NS4G I got for my birthday this pass Dec and had sprint service on it but now want to flash it to boost mobile. I was able to root it, but that is all. any info would greatly be appreciated!
Thanks
Blktigger

blktigger said:
Please Help, I have been all over Google and multiple forums and cant find out how to flash my phone to boost. I have a NS4G I got for my birthday this pass Dec and had sprint service on it but now want to flash it to boost mobile. I was able to root it, but that is all. any info would greatly be appreciated!
Thanks
Blktigger
Click to expand...
Click to collapse
what you are talking about can not be talked about as it is illegal to change the esn and meid all all other device identifiers that are registered to the fcc. Each phone has a unique id to it that is represented to the fcc. I have also been talking with Boost employess and area managers and boost is getting ready to kick off the users who have "flashed" phones on Boost that do not belong on boost. This is going to be done as Boost can still tell what type of phone you have other then the esn / meid as the device still sends out certain other device ids to the network when you use certain programs. Also by trying to send updates to your phone sprint can request the system information from your phone that can tell them the actual make and model and firmware and all that you are running. And you thought carrier iq was bad...
if you wait a few months or so the evo 3d will be on sprints virgin mobile with ics included and sense 3.6...
Boost mobile will be getting the HTC Evo design 4g soon as well...
i myself dont understand why boost is going 4g when sprint is going lte... but another stupid move by sprint.

does anyone have a link to a how to flash my nexus s 4g to boost? I'd really like to do this. cant afford sprint anymore...

[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] sch-i535 on t-mobile

So here is what I am looking for... i have a Verizon SCH-i535, and what I am looking for is someone who has flashed the stock tmobile rom and changed the bands within the phone its self using the hidden menu (netmonitor app) to see if they can get more than just edge data... I have it flashed to AT&T right now and am using a friends T-mobile sim card that we cut down to fit into the SCH-i535 GS3... it seemed to sync with the towers and get mms.. text.. calls... and internet... just not 3g... I would like to know if someone has found a fix to this issue...
Thanks for your time.

Why not just flash the Verizon Jellybean Rom (Cleanrom or Jellywiz) since global mode was enabled in that Rom? Then drop your tmo sim in.
Sent from my SCH-I535 using Tapatalk 2

bobloblaw1 said:
Why not just flash the Verizon Jellybean Rom (Cleanrom or Jellywiz) since global mode was enabled in that Rom? Then drop your tmo sim in.
Sent from my SCH-I535 using Tapatalk 2
Click to expand...
Click to collapse
You know I had not thought about using the global mode on verizon.. I will have to give that a try... do you know if that will allow for 3g on tmobile?

Useful thread so far, but I have a several questions.
I currently have a Verizon Galaxy S3 SGH-i535 with a T-Mobile prepaid sim card (unlimited everything), I can call and text, but cannot get any network access.
I'm currently running Clean Rom 5, settings on Global. Is there any way I can enable data, preferred 3G? [due to that T-Mobile will get 4G on Verizon phones next month).
On CM10, I get Edge and can receive text, but cannot send text. Tried APN settings, etc. Is there a fix for this?
I have tried everything, but no luck. Any suggestions is appreciative

jtdo said:
Useful thread so far, but I have a several questions.
I currently have a Verizon Galaxy S3 SGH-i535 with a T-Mobile prepaid sim card (unlimited everything), I can call and text, but cannot get any network access.
I'm currently running Clean Rom 5, settings on Global. Is there any way I can enable data, preferred 3G? [due to that T-Mobile will get 4G on Verizon phones next month).
On CM10, I get Edge and can receive text, but cannot send text. Tried APN settings, etc. Is there a fix for this?
I have tried everything, but no luck. Any suggestions is appreciative
Click to expand...
Click to collapse
So what I did is i unlocked the bootloader... rooted it... and then flashed the AT&T stock rom on it and then plugged in the TMO sim card and then changed the bands to GSM auto. and it picked up edge... I was able to get access to the network with data... but the only catch was that it was slow as hell... as it was only edge. I am still working on programming to get the i535 on the tmobile bands... thus far I have not been able to get the phone on 4g or even 3g yet... I will keep you updated though.

jtdo said:
Useful thread so far, but I have a several questions.
I currently have a Verizon Galaxy S3 SGH-i535 with a T-Mobile prepaid sim card (unlimited everything), I can call and text, but cannot get any network access.
I'm currently running Clean Rom 5, settings on Global. Is there any way I can enable data, preferred 3G? [due to that T-Mobile will get 4G on Verizon phones next month).
On CM10, I get Edge and can receive text, but cannot send text. Tried APN settings, etc. Is there a fix for this?
I have tried everything, but no luck. Any suggestions is appreciative
Click to expand...
Click to collapse
have you tried using the hidden menu in the dial pad at all??
There is an app out there that will get access to the menu and allow you to change everything in the phone... but be very careful with this app as it can and will brick your phone if you do not know what you are doing with the app..
Netmonitor --> look for this on the google play store
To change the bands to at least get data on the phone, follow the instructions below:
1. install Netmonitor on the S3
2. open the app
3. hit the menu button
4. select field test
5.select UMTS
6. Select DEBUG SCREEN
7. Select PHONE CONTROL
8. Select NETWORK CONTROL
9. select BAND SELECTION
10. Select either AUTOMATIC or GSM Band Preference
* if you choose automatic the phone will look at the sim card and go from there to get the phone on the network to get data on the phone.
11. Select GSM ALL
This is the thread that I am following at the moment to get the phone on HSPA+ or 3G.. If you have anymore questions then please let me know I will do my best to help you out.

angelicsoldier said:
have you tried using the hidden menu in the dial pad at all??
There is an app out there that will get access to the menu and allow you to change everything in the phone... but be very careful with this app as it can and will brick your phone if you do not know what you are doing with the app..
Netmonitor --> look for this on the google play store
To change the bands to at least get data on the phone, follow the instructions below:
1. install Netmonitor on the S3
2. open the app
3. hit the menu button
4. select field test
5.select UMTS
6. Select DEBUG SCREEN
7. Select PHONE CONTROL
8. Select NETWORK CONTROL
9. select BAND SELECTION
10. Select either AUTOMATIC or GSM Band Preference
* if you choose automatic the phone will look at the sim card and go from there to get the phone on the network to get data on the phone.
11. Select GSM ALL
This is the thread that I am following at the moment to get the phone on HSPA+ or 3G.. If you have anymore questions then please let me know I will do my best to help you out.
Click to expand...
Click to collapse
I have not tried that yet, but just right now, I got successful on connecting with Data by changing my APN (http://forum.xda-developers.com/showthread.php?p=34632097#post34632097), but fairly still slow G speed. Hoping for HSPA+ or 3G too.

jtdo said:
I have not tried that yet, but just right now, I got successful on connecting with Data by changing my APN (http://forum.xda-developers.com/showthread.php?p=34632097#post34632097), but fairly still slow G speed. Hoping for HSPA+ or 3G too.
Click to expand...
Click to collapse
Changing APN's is another way to do what I just told you about... My way is a little easier.. lol .. let me know if you want/need any further help

Hmm, one more thing:
Is there anyway to make this work on CM10 or AOKP? Due to that global setting/APN setting is not available on these ROMs. =/

jtdo said:
Hmm, one more thing:
Is there anyway to make this work on CM10 or AOKP? Due to that global setting/APN setting is not available on these ROMs. =/
Click to expand...
Click to collapse
I have not messed with custom roms just yet I am working with stock roms and rooting and unlocking bootloaders right now... I will see if I can find them time to load a CM10 on my s3 that I am using for development and get back to you with the results here as soon as I have them... I am not for sure if I am going to be able to get to it this week as I have alot going on but I will try and get to it.

Thanks for your support.
In the mean time, I will see if the CM or AOKP team can implement these settings.

jtdo said:
Thanks for your support.
In the mean time, I will see if the CM or AOKP team can implement these settings.
Click to expand...
Click to collapse
that would be great! If I can help in any other way let me know.. or if they have questions please give them a link to this thread. and I will be more than happy to talk to them.

hey guys sorry that it has taken awhile for me to get back to you.. so I flashed the TMO rom on the I5 and got the same results just edge. I think that I am going to try using bobloblaw1 suggestion and flash the verizon leaked jellybean rom and then use global mode to be able to see if I am going to be able to get more than edge...
Here is a guide if you do not know how to flash roms on your S3 here

greetings, all.
i have the same problem that you are describing. running CM 11 Nightly (but problem also existed on VZW stock & CM 10.2). i have read all the forum's about this topic, but as of yet there seems to be no SURE fix to get anything faster than Edge data from T-mobile.
check out this thread:
http://forum.xda-developers.com/showthread.php?t=1895684

angelicsoldier said:
that would be great! If I can help in any other way let me know.. or if they have questions please give them a link to this thread. and I will be more than happy to talk to them.
Click to expand...
Click to collapse
Any link to that ROM?
Sent from my SGH-T999 using xda app-developers app
---------- Post added at 04:33 PM ---------- Previous post was at 04:26 PM ----------
angelicsoldier said:
hey guys sorry that it has taken awhile for me to get back to you.. so I flashed the TMO rom on the I5 and got the same results just edge. I think that I am going to try using bobloblaw1 suggestion and flash the verizon leaked jellybean rom and then use global mode to be able to see if I am going to be able to get more than edge...
Here is a guide if you do not know how to flash roms on your S3 here
Click to expand...
Click to collapse
Any link to that ROM/
Sent from my SGH-T999 using xda app-developers app

Manual PRL Flashing

So I have seen this mentioned in a few threads but I wanted to strart a thread totally dedicated to this...
Sprint and other CDMA provider require a PRL (Preferred Roaming List) to identify which towers to connect to, including towers to roam on. They release various PRLs based on type of account, business or personal. Business accounts generally have more towers set up for VZW and allow users to roam more freely. I'm not looking to abuse this but it definitely helps in situations where I can't get a Sprint signal. Before the Sprint bashing starts, I know the coverage sucks right now.
On many touchwiz Roms I have been able to manually write a PRL file by renaming the PRL file to test.PRL and calling the write PRL function of the dailer by accessing a ## menu and clicking the write PRL button.
I have looked in all of the known dialer codes and menus and can't find a way to flash a PRL manually. Can any developers / hackers figure this one out? I will be glad to help in any way I can and would even be willing to pay a few of bucks for the app if app development is required. Thanks!
Sent from my Nexus 7 using Tapatalk 4

Bump
Sent from my Nexus 5 using Tapatalk

I am currently taking a look through the data/data/com.android.provider databaseses to see if I can edit the PRL manually as with how I needed to add the "dun_tether_required" to bypass carrier blocking of Hotspot....

mariano3113 said:
I am currently taking a look through the data/data/com.android.provider databaseses to see if I can edit the PRL manually as with how I needed to add the "dun_tether_required" to bypass carrier blocking of Hotspot....
Click to expand...
Click to collapse
Thank you so much! I hope you find something good.
Sent from my Nexus 7 using Tapatalk 4

mariano3113 said:
I am currently taking a look through the data/data/com.android.provider databaseses to see if I can edit the PRL manually as with how I needed to add the "dun_tether_required" to bypass carrier blocking of Hotspot....
Click to expand...
Click to collapse
thank you!

irev210 said:
thank you!
Click to expand...
Click to collapse
I understand the concept of PRL lists, but why do GSM carriers not use something like this?

It would also be nice to force Verizon roaming. Any one find a way to do this?
Sent from my Nexus 5 using Tapatalk

dijit4l said:
I understand the concept of PRL lists, but why do GSM carriers not use something like this?
Click to expand...
Click to collapse
I'm not sure.
Sent from my Nexus 5 using Tapatalk

Bump. Anyone find anything?
Sent from my Nexus 7 using Tapatalk 4

mariano3113 said:
I am currently taking a look through the data/data/com.android.provider databaseses to see if I can edit the PRL manually as with how I needed to add the "dun_tether_required" to bypass carrier blocking of Hotspot....
Click to expand...
Click to collapse
This is how I got tethering to work on lollipop. Might be what you need..
$ adb shell settings put global tether_dun_required 0
https://pmf.silvrback.com/fixing-tethering-on-android-kitkat

Just to clarify, I still use the tether fun required 0 entry in Global under settings.db
But originally I was looking for a way to sideload "PRLs"
Initially LTE (4g) was lacking in my area and better 3g (Evdo Rev A) could be obtained based on PRL. But LTE coverage has improved and I no longer need to worry about a PRL to improve 3g performance.
On Sprint I have been using Hangouts Dialer to do simultaneous voice and calling by using data and/or WiFi for phone calls. Allowing me to still browse/use data at the same time.

Have you tried this method?
http://forum.xda-developers.com/showthread.php?t=1871352
I will tomorrow.