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Infuse APN Settings help

Hi guys, just got the new Infuse. I can't get data/3G. Voice works. I went into the APN settings, and there are two apns. One is called ATT Phone and one ATT WAP. I cannot choose between the two, I cannot delete them, I cannot edit them, I cannot add a new APN. Looking at the ATT WAP apn is missing the username and password, and I guess that's why it doesn't work.
I've never encountered an android device where I couldn't modify the apns, so I don't know what to do. Any ideas? Thanks!

What provider are you using?
Look in the market for apn. I forget the name of it, but there are several apn managers in the market that will let you backup and edit your apn some Android phones require two to work it seems. And if memory serves one of them is mostly blank.
Sent from my SAMSUNG-SGH-I997 using XDA Premium App

I'm using ATT. I played around it some more, and finally it let me save a new APN and I'm able to select it, so now everything works fine...

That was the normal setting for the phone as you described.
It should not have been a need for you to edit anything. My phone had the same settings and worked fine.

I have the same problem. Can you give me an instruction of how to fix it?

I just went to setting>Mobile Networks>Access Point Names
Then i added the new APN that my service provider her in the Dominican Republic gave me.
Have not reset the phone or tried anything yet.
Is this the correct process? WHere have you guys been trying to change it that it will not let you?

Here are the exact setting that work for me..
AT&T Settings.
Name: ATT WAP
APN: wap.cingular
Proxy: wireless.cingular.com
Port: 80
Username: Not Set
Password: Not Set
Server: Not Set
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MCC: 310
MNC: 410
Authentication type: None
APN type: internet + mms
I hope this helps like it helped me.
Rocky.

Rocky is correct. I was having a similer issue and I have to add a new wntry by going to the Apn and adding a 3rd one like this. The name did not matter as I called mine test and used the same setting that Rocky posted (I got them from youtube shwing how to add it).
Now I have 3 APN and it works correctly.

THANK YOU!!! I am on infused 2.2.3 and everything was working peachy until a few days ago when I could no longer connect to data. I could get phone calls, but no data. I tried flashing a new modem, tried a new kernel, and was fixin to restore to stock because I didn't know what else to do until I say Rocky's post with the APN settings. This worked like a charm. Thanks again!!!

I was going to post this the other day but wanted to make sure it worked first. I stumbled onto this post in the SGS2 forums which gives the simplest solution that have given me the best result. The other suggested APN settings I've seen in various threads never worked for me. I wouldn't expect as monumental a jump in bandwidth as he shows, but it seems to be doing well otherwise.
[FIX] AT&T SGS2 Data Speed Issue's (Correct APN Settings)

Tgrifftto, did you try and successfully use those apn's on an infuse? I tried them and didn't get a connection, I'm running CM7.
Sent from my SGH-I997 using XDA App

I used them with the Infused v2.2.3 ROM and they worked well. I flashed to GSInfuse 1.1.5 today however to try on there because the last time I flashed this ROM it was bouncing sporadically between 3G and HSPA+ and was hoping it would alleviate that issue. So far no luck.
The settings suggested before is one of the default APNs (can also be set by hitting "menu/reset to default" on the APN settings screen), so may be what you wanna go with if it works for you. Another option I found that has worked for several people is along with the default settings specified previously including the following settings as well:
User name: [email protected]
Password: CINGULAR1
It seems to definitely be a "results may vary" kindof thing.

tgriffttu said:
I was going to post this the other day but wanted to make sure it worked first. I stumbled onto this post in the SGS2 forums which gives the simplest solution that have given me the best result. The other suggested APN settings I've seen in various threads never worked for me. I wouldn't expect as monumental a jump in bandwidth as he shows, but it seems to be doing well otherwise.
[FIX] AT&T SGS2 Data Speed Issue's (Correct APN Settings)
Click to expand...
Click to collapse
I actually tried that myself and had MMS issues, but I think I have a working hybrid of the two. I have been getting decent speeds and MMS works but I have been getting erratic results and need to test more.
Edit: Ok so dont judge me on this if it doesn't do anything for you but the data seems convincing to me for the moment. I tweaked a few things that have been posted previously and one thing in particular seems to have changed things for me. I removed the http:// from the MMSC server address and dropped the specified MMSC Proxy. I honestly don't know why it would have altered the routing so drastically and I do not have a traceroute to show if it maps differently this way but the attached shows the results I'm getting and for some reason adding the http:// and the specified MMS proxy (66.209.11.32) always slows me down noticeably. I cant measure my signal loss (other than on the phone) to see if anything else happens to be interfering when I have the http:// and the proxy address in place (cloud bounce reflectivity, solar flares, increase usage on the high tension lines between me and the tower) but these results are what I get every time I swap settings. The bottom 3 results on the attached are with http:// and proxy included and the top 4 are without it. Phone was sitting on my desk in the same place for all tests with the only changes (I could control anyway) being the APN setting. You'll see my ping times are almost identical so my routing couldn't have changed very drastically, but the numbers mean something is different.
Here are the settings I am using
Name: ATTINTMMS (just what I called it call it whatever you want)
APN: wap.cingular
Proxy: wireless.cingular.com
Port: 80
Username: [email protected]
Password: CINGULAR1
Server: Not Set
MMSC: mmsc.cingular.com
MMS Proxy: Not Set
MMS Port: 80
MCC: 310
MNC: 410
Authentication type: None
APN type: internet + mms
As always this may or may not help you depending on the network architecture where you live and your local data traffic avg, but this is what it did for me.....

rocksteady said:
Here are the exact setting that work for me..
AT&T Settings.
Name: ATT WAP
APN: wap.cingular
Proxy: wireless.cingular.com
Port: 80
Username: Not Set
Password: Not Set
Server: Not Set
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MCC: 310
MNC: 410
Authentication type: None
APN type: internet + mms
I hope this helps like it helped me.
Rocky.
Click to expand...
Click to collapse
im running ics miui and under APN Type it just opens a field to type into like a text. when i reset settings to default it sets this to *...just a star. i see everyone has this internet + mms but i dont get any options. this is causing my calls to be dropped drastically and my data to cut in and out.

sl0v4k said:
im running ics miui and under APN Type it just opens a field to type into like a text. when i reset settings to default it sets this to *...just a star. i see everyone has this internet + mms but i dont get any options. this is causing my calls to be dropped drastically and my data to cut in and out.
Click to expand...
Click to collapse
I havent tried it but i posted a possible solution in the miui thread...my apn settings disappeared after i flashed pikachus thunderbolt but reappeared after a restart....i dont think that your problem is that easy tho?
Also when you finally figure it out, i read in the Thunderbolt thread that changing APN from "wap.cingular" to "phone" will increase data speeds....according to linuxbozo
Hope this helped
Sent from my SGH-I997 using xda premium

albee320 said:
I havent tried it but i posted a possible solution in the miui thread...my apn settings disappeared after i flashed pikachus thunderbolt but reappeared after a restart....i dont think that your problem is that easy tho?
Also when you finally figure it out, i read in the Thunderbolt thread that changing APN from "wap.cingular" to "phone" will increase data speeds....according to linuxbozo
Hope this helped
Sent from my SGH-I997 using xda premium
Click to expand...
Click to collapse
yea the "phone" thing does give me faster speeds. i still get cut out a lot though i love how tech support doesnt know sh*t lol. its been happening to me on all roms.

Guys, one thing to note is that CM7 (and in turn MIUI), don't like multiple APNs. AT&T runs their ROMs with two different APNs, keeping the data APN separate. This is fine on any ROM based on AT&T's releases, however, if you try to use two on CM7, you'll likely run into issues. The best thing to do is disable the "phone" APN and only use the "wap.cingular" APN. If you have both on your phone, you can do this by adding "default" to the list of APN types for the "wap.cingular" APN (or you should be able to entirely delete, just make sure to add default to "wap.cingular").
If you do run an AT&T based ROM, I highly suggest you do use both with "wap.cingular" for mms and supl APN types, and "phone" for default. This is the absolute only "trick" you can do to make the phone's data a little faster (since build.prop changes don't do anything).
Here are the details for both:
"wap.cingular" APN:
Name: ATT MMS
APN: wap.cingular
Proxy: Not set
Port: Not set
Username: Not set
Password: Not set
Server: Not set
MMSC: http://mmsc.cingular.com
MMS Proxy: 66.209.11.32
MMS Port: 80
MCC: 310
MNC: 410
Authentication type: Not set
APN type: mms,supl (and default if you are only using this APN)
APN protocol: IPv4
"phone" APN:
Name: ATT
APN: phone
Proxy: Not set
Port: Not set
Username: Not set
Password: Not set
Server: Not set
MMSC: Not set
MMS Proxy: Not set
MMS Port: Not set
MCC: 310
MNC: 410
Authentication type: Not set
APN type: default
APN protocol: IPv4
I notice a definite increase in response time with the "phone" APN. Pages seem to load a lot faster, regardless of what actual speed increases it gives you, so I recommend using that if you aren't on CM7 or MIUI. If you are, well, stick to single APN or else you'll see data issues, especially in Market.
sl0v4k said:
im running ics miui and under APN Type it just opens a field to type into like a text. when i reset settings to default it sets this to *...just a star. i see everyone has this internet + mms but i dont get any options. this is causing my calls to be dropped drastically and my data to cut in and out.
Click to expand...
Click to collapse
It's not "internet + mms", you specifically type in "internet,mms". It is just a text field. You have to type in what you want. Actually, "internet + mms" may be a valid setting in that field, but I've always seen it comma separated, so that's what I'd stick to. I'm not sure what valid APN types there are, the ones I know of are mms, supl, internet, and default. default obviously being the catch all for anything not configured in another APN.

AJerman said:
Guys, one thing to note is that CM7 (and in turn MIUI), don't like multiple APNs. AT&T runs their ROMs with two different APNs, keeping the data APN separate. This is fine on any ROM based on AT&T's releases, however, if you try to use two on CM7, you'll likely run into issues. The best thing to do is disable the "phone" APN and only use the "wap.cingular" APN. If you have both on your phone, you can do this by adding "default" to the list of APN types for the "wap.cingular" APN (or you should be able to entirely delete, just make sure to add default to "wap.cingular").
If you do run an AT&T based ROM, I highly suggest you do use both with "wap.cingular" for mms and supl APN types, and "phone" for default. This is the absolute only "trick" you can do to make the phone's data a little faster (since build.prop changes don't do anything).
Here are the details for both:
"wap.cingular" APN:
Name: ATT MMS
APN: wap.cingular
Proxy: Not set
Port: Not set
Username: Not set
Password: Not set
Server: Not set
MMSC: http://mmsc.cingular.com
MMS Proxy: 66.209.11.32
MMS Port: 80
MCC: 310
MNC: 410
Authentication type: Not set
APN type: mms,supl (and default if you are only using this APN)
APN protocol: IPv4
"phone" APN:
Name: ATT
APN: phone
Proxy: Not set
Port: Not set
Username: Not set
Password: Not set
Server: Not set
MMSC: Not set
MMS Proxy: Not set
MMS Port: Not set
MCC: 310
MNC: 410
Authentication type: Not set
APN type: default
APN protocol: IPv4
I notice a definite increase in response time with the "phone" APN. Pages seem to load a lot faster, regardless of what actual speed increases it gives you, so I recommend using that if you aren't on CM7 or MIUI. If you are, well, stick to single APN or else you'll see data issues, especially in Market.
It's not "internet + mms", you specifically type in "internet,mms". It is just a text field. You have to type in what you want. Actually, "internet + mms" may be a valid setting in that field, but I've always seen it comma separated, so that's what I'd stick to. I'm not sure what valid APN types there are, the ones I know of are mms, supl, internet, and default. default obviously being the catch all for anything not configured in another APN.
Click to expand...
Click to collapse
ooohh thanks very much buddy. my issue was when i typed that with the plus sign i would loose data completely. actually everything except default and * cause me to loose my data. i am running miui and i did notice that the 2 apns make the phone go ape****. i kinda setup my own through a lot of research and googling and i came up with this which is making it go flawlessly except for the speed its not as fast as it can be. my setup is:
Name: AT&T
APN: phone
Proxy: wireless.cingular.com
Port:80
Username: [email protected]
Password: CINGULAR1
Server: <not set>
MMSC: http://mmsc.cingular.com
MMS Proxy: 66.209.11.32
MMS Port: 80
MCC: 310
MNC: 410
Authentication Type: None
APN Type: <not set> (this seems to work best this way)
APN Protocol: IPv4
for me if i leave out the username and pass then my data connection cuts in and out. like it never wakes up when i start using phone

sl0v4k said:
ooohh thanks very much buddy. my issue was when i typed that with the plus sign i would loose data completely. actually everything except default and * cause me to loose my data. i am running miui and i did notice that the 2 apns make the phone go ape****. i kinda setup my own through a lot of research and googling and i came up with this which is making it go flawlessly except for the speed its not as fast as it can be. my setup is:
Name: AT&T
APN: phone
Proxy: wireless.cingular.com
Port:80
Username: [email protected]
Password: CINGULAR1
Server: <not set>
MMSC: http://mmsc.cingular.com
MMS Proxy: 66.209.11.32
MMS Port: 80
MCC: 310
MNC: 410
Authentication Type: None
APN Type: <not set> (this seems to work best this way)
APN Protocol: IPv4
for me if i leave out the username and pass then my data connection cuts in and out. like it never wakes up when i start using phone
Click to expand...
Click to collapse
See, I thought I remembered one of them needing the username and password, however, I don't have one in my phone and it seems to work just fine. *shrug* Whatever works I suppose! But yeah, on MIUI just stick to single APN. I would assume not setting the APN Type would cause it to automatically default to everything using that APN (if it's the only one).

im one of the infuse owners and i noticed something with the signal issue ive been having for a very long time. data fix didnt work for me nothing seemed to work for me. the best results i get is with KI3 modem. also when i try to set "network type selection" to 3G only sometimes it automatically resets to 3G preffered which is what gives me the issues. but the thing i noticed is i have these severe issues of service cutting in and out when i am on umts. when i force my phone on hsdpa my download speeds almost triple my calls r beautifully clear no cutting in and out. any thought on this? is there a way i can have my phone on hsdpa only? and default the setting to 3G only in network settings? thanks in advance for any input i would really like to solve this

Can't connect to network?

I just bought an Inspire and I can't connect to Att network. It shows the H+ and shows that Att is my Newtork Operator but it wont let change any of the settings or scan for other networks. I had a HD2 that was unlocked and work like a charm on the network but now it won't let me play with the settings. Do you think that I have an old data plan back in 2005 that was unlimited to my Sony Erricison?

Your data plan has to be 4g otherwise it won't connect to the data. You can keep unlimited also.
Sent from my Inspire 4G using XDA App

The H+ usually means that you are connected to the data network. Are you sure it isn't a H with a check mark? Which means that you aren't connected to the network. To use the default APN settings you have to be on a "4G" plan, like the previous poster said. You can always add an APN to the list and use it as well. I had this issue when I first got my Inspire. Try these settings.
Name: ATT
APN: wap.cingular
Proxy: wireless.cingular.com
Port: 80
Username: [email protected]
Password: CINGULAR1
MMSC: http://mmsc.cingular.com
MMS proxy: wireless.cingular.com
MMS port: 80
MCC: 310
MNC: 410
APN type: default,mms,supl
Everything else:

internet just stopped working ?

really have no idea whats going on, i used my phone like normal today running darky rom (port)
(yes i have an infuse 4g) and now my internet wont work at all, a few days ago i got a text from att saying that i was in the top 5% of internet users orsomething.
(i dont do any tethering, but i stream pandora all the time). i checked data at the time i was at 5gb.
i checked again now and im at 5.5 gg.
i thought that because i had an iphone 3g previously and had a grandfathered data plan that i should be alright.
(when i check data with *data# it says, (data 5519.3 of unlimited)
when i try to go to any website it loads for a long time then says "web page is not available"
any idea whats going on ?

The_Zodiac said:
really have no idea whats going on, i used my phone like normal today running darky rom (port)
(yes i have an infuse 4g) and now my internet wont work at all, a few days ago i got a text from att saying that i was in the top 5% of internet users orsomething.
(i dont do any tethering, but i stream pandora all the time). i checked data at the time i was at 5gb.
i checked again now and im at 5.5 gg.
i thought that because i had an iphone 3g previously and had a grandfathered data plan that i should be alright.
(when i check data with *data# it says, (data 5519.3 of unlimited)
when i try to go to any website it loads for a long time then says "web page is not available"
any idea whats going on ?
Click to expand...
Click to collapse
Check into settings---> wireless connections--->Mobile networks--->APN(access point names)
Just check you still got your att apns they may have erased or be bad information.
If that doesnt work go into recovery try a cache cleaning.
If that doesnt work try another ROM, if you still have no data then call ATT.
Hope it solves.
_____________________________________________
I dont know if this APN will work for you but heres some APN info:
Name: AT&T HSPA+
APN: phone
No User / Password
MMSC: http://mmsc.cingular.com
Proxy MMS: wireless.cingular.com
MMS Port: 80
MCC: 310
MNC: 410
OR:
APN: wap.cingular
Proxy: [Leave Blank]
Port: [Leave Blank]
Username: [email protected]
Password: CINGULAR1
Server: [Leave Blank]
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MMS Protocol: [Leave Blank]
MCC: 310
MNC: 410

koriotto said:
Check into settings---> wireless connections--->Mobile networks--->APN(access point names)
Just check you still got your att apns they may have erased or be bad information.
If that doesnt work go into recovery try a cache cleaning.
If that doesnt work try another ROM, if you still have no data then call ATT.
Hope it solves.
_____________________________________________
I dont know if this APN will work for you but heres some APN info:
Name: AT&T HSPA+
APN: phone
No User / Password
MMSC: http://mmsc.cingular.com
Proxy MMS: wireless.cingular.com
MMS Port: 80
MCC: 310
MNC: 410
OR:
APN: wap.cingular
Proxy: [Leave Blank]
Port: [Leave Blank]
Username: [email protected]
Password: CINGULAR1
Server: [Leave Blank]
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MMS Protocol: [Leave Blank]
MCC: 310
MNC: 410
Click to expand...
Click to collapse
yeah i checked my apn's and they were fine.
as it turns out i checked again the next morning and it was working no problem.
my guess is att was doing maintenance or something lol

Funny thing is my phone was doing the same thing. Must have been maintenance because all my phones weren't working.
Sent from my SAMSUNG-SGH-I997 using XDA App

No MMS no matter what ROM/KERNEL/firmware etc...

Like the title says, since the second ROM I ever installed, (CM7 alpha 10 I believe) I have not been able to send/receive MMS on any combo of software , ICS or GB, kernel , etc. I have verified the APN's, still nothing... my plan allows unlimited, so unfortunate that I can't use it...Any ideas are welcome
Sent from my Sensation using XDA

Sensation-al! said:
Like the title says, since the second ROM I ever installed, (CM7 alpha 10 I believe) I have not been able to send/receive MMS on any combo of software , ICS or GB, kernel , etc. I have verified the APN's, still nothing... my plan allows unlimited, so unfortunate that I can't use it...Any ideas are welcome
Sent from my Sensation using XDA
Click to expand...
Click to collapse
I have the same problem with MMS as well.
I opened a topic in Q/A section but no one replied...

Im on energy ics rom and its my first custom rom setted mms apns for rogers correctly couldn't send pics didn't try receiving tho...
Sent from my HTC Sensation Z710e using xda premium

I don't know if this helps or not, but It seems like people with American Carriers, or T-mobile tend to not have issues with MMS. I don't know if this would work, but maybe comparing APN settings and seeing if anything is missing may work?

Settings -> More.. -> Mobile Networks -> Access Point Names ->
at this point I had three or three options...
I assume they were: T-Mobile, T-Mobile Data, and T-Mobile MMS
Now since I use Simple Mobile, I had to change the T-Mobile to Simple Mobile with all the correct settings, and for MMS to work I also had to change the T-Mobile MMS APN with the same exact settings as the Simple Mobile APN.
-----------------------------------------------------------------------------
One other way you may try, after putting all the correct settings;
Where is says APN Type, write "mms" (without quotes)
Give it a try. Hope it helps.

Problem is, I'm on Bell Canada...
Sent from my Sensation using XDA

Me on rogers it wasn't a signal issue as i had full bars i just saw the "h" coming up only the upper bar was lightning but the lower one was normal..
Sent from my HTC Sensation Z710e using xda premium

Sensation-al! said:
Problem is, I'm on Bell Canada...
Sent from my Sensation using XDA
Click to expand...
Click to collapse
This is not my work, please try and confirm.
BELL:
Name: Bell Internet
APN: pda.bell.ca
Proxy: web.wireless.bell.ca
Port: 80
MMSC: http://mms.bell.ca/mms/wapenc
MMS proxy: web.wireless.bell.ca
MMS port: 80
MCC: 302
MNC: 610
APN type: Internet + mms
Authentication Type: none
ROGERS:
Here are the settings for Data
Name: Rogers
APN: internet.com
Username: wapuser1
Password: wap
MCC: 302
MNC: 72 (If that doesn't work try 720, its already filled in, leave it at what it is)
Leave the rest blank. Now you Data should be working
Here are the settings Multimedia Messaging
Name: Rogers MMS
APN: media.com
Username: media
Password: mda01
Server: 172.25.0.107
MMSC :http://mms.gprs.rogers.com
MMS Proxy: 10.128.1.69
MMS Port: 80
MCC: 302
MNC: 72 (If that doesn't work try 720, its already filled in, leave it at what it is)
APN Type: mms
Leave the rest blank. Now MMS should be working!
HAVE A LOOK AT HERE: http://forum.xda-developers.com/showthread.php?p=21105129

I'm on Wind and I cant neither send nor receive mms but I think my settings are correct since the phone detected it automatically. Any ideas ?

I am with O2 uk and also had this issue. I contacted them and they emailed their latest apn settings to me, which I copied in to my settings and my mms then worked fine. I think when some custom roms search for the apns automatically they pick up out of date settings. Just phone your carrier and ask for the apn settings for mms as if you are getting internet but no mms on several roms it can only be due to incorrect apn.
sent from my Sensation XE

Pikabat said:
I'm on Wind and I cant neither send nor receive mms but I think my settings are correct since the phone detected it automatically. Any ideas ?
Click to expand...
Click to collapse
Go into apns
Choose WIND MMS
Under MMSC it will say http://mms.windmobile..ca
Change it to http://mms.windmobile.ca
It never used to do this but I've noticed for the last couple months its messed.
That should solve it! Hit thanks if I helped!

cdstewart said:
Go into apns
Choose WIND MMS
Under MMSC it will say http://mms.windmobile..ca
Change it to http://mms.windmobile.ca
It never used to do this but I've noticed for the last couple months its messed.
That should solve it! Hit thanks if I helped!
Click to expand...
Click to collapse
it did lol thanks dude , any idea what caused that?

No clue, maybe I should call back office and let them know..

cdstewart said:
Go into apns
Choose WIND MMS
Under MMSC it will say http://mms.windmobile..ca
Change it to http://mms.windmobile.ca
It never used to do this but I've noticed for the last couple months its messed.
That should solve it! Hit thanks if I helped!
Click to expand...
Click to collapse
thanks! solved my problem!

MasterGGM said:
This is not my work, please try and confirm.
BELL:
Name: Bell Internet
APN: pda.bell.ca
Proxy: web.wireless.bell.ca
Port: 80
MMSC: http://mms.bell.ca/mms/wapenc
MMS proxy: web.wireless.bell.ca
MMS port: 80
MCC: 302
MNC: 610
APN type: Internet + mms
Authentication Type: none
ROGERS:
Here are the settings for Data
Name: Rogers
APN: internet.com
Username: wapuser1
Password: wap
MCC: 302
MNC: 72 (If that doesn't work try 720, its already filled in, leave it at what it is)
Leave the rest blank. Now you Data should be working
Here are the settings Multimedia Messaging
Name: Rogers MMS
APN: media.com
Username: media
Password: mda01
Server: 172.25.0.107
MMSC :http://mms.gprs.rogers.com
MMS Proxy: 10.128.1.69
MMS Port: 80
MCC: 302
MNC: 72 (If that doesn't work try 720, its already filled in, leave it at what it is)
APN Type: mms
Leave the rest blank. Now MMS should be working!
HAVE A LOOK AT HERE: http://forum.xda-developers.com/showthread.php?p=21105129
Click to expand...
Click to collapse
For those having trouble with Rogers, I wasted quite a bit of time trying to figure out why I couldn't send/receive MMS. Solution for me was this:
1. USE ONLY THIS APN, DELETE ALL THE OTHER APNS - For some reason, it conflicted and when I deleted all the other unnecessary APN's it worked great again. Here's what I used and ONLY this one for Rogers Canada. The internet.com apn doesn't work for me, fortunately I found this one that works!
Name: Rogers MMS
APN: rogers-core-appl1.apn
MMSC: http://mms.gprs.rogers.com
MMS Proxy: 10.128.1.69
MMS Port: 80
MCC: 302
MNC: 720

Problem still exists, any ideas?
Sent from my Sensation using XDA

[Q] LTE and Data random disconnects

I recently flashed to the uclf5 galaxy S3 r4 rom with mohans kernel and I love it. The only problem is the Data connections. The original APN that installed in the flash would connect and had great speeds but would not allow me to send or receive picture messages. Standard text's were ok but no pictures.
I looked around google and the XDA forums and tried a couple of new APN's. I finally got one that would connect and send pictures but it wasn't connecting to 4G LTE only 4G, 1st world problems yes but I wanted the LTE. as I continued searching I managed to get one to connect to LTE and still send pictures and everything was working perfectly, Except now the phone randomly disconnects from all connections with a little circle with a line through it instead of connection bars and obviously no data or phone calls. If I toggle back and forth between APN's I can get it to connect again but it's very intermittent sometimes it'll stay connected for hours other times for just minutes.
I originally had the SKYICS Superlite Rom installed and didn't have any connection issues what so ever and i'm completely at a loss as to what's going on now.
Original APN Settings
Name: ATT Phone
APN: phone
Proxy: Not set
Port: Not set
Username: Not set
Password: Not set
Server: Not Set
MMSC: http ://mmsc.mobile.att.net
MMS Proxy: proxy.mobile.att.net
MMS Port: 80
MCC: 310
MNC: 410
Authentication Type: None
APN type: default,mms,supl
APN protocol: IPv4
Allows Picture messaging but no LTE
Name: ATT
Phone
APN: wap.cingular
Proxy: Not Set
Port: Not set
Username: WAP @CINGULARGRPS.COM
Password: (Forgot but it's there)
Server: Not Set
MMSC: mmsc.cingular.com
MMS Proxy: 66.209.11.32
MMS Port: 80
MCC: 310
MNC: 410
Authentication Type: None
APN type: default,mms,supl
APN protocol: IPv4
Allows Picture Messaging and LTE
Name: ATT LTE
APN: phone
Proxy: Not Set
Port: Not set
Username: Not set
Password: Not set
Server: Not Set
MMSC: Not set
MMS Proxy: Not set
MMS Port: Not set
MCC: 310
MNC: 410
Authentication Type: None
APN type: default,mms,supl
APN protocol: IPv4
I'm not sure how that last one works but it does.
These settings do work, but again pretty much at will. this morning i woke up and was conected to edge. that was scary...
I'm not sure if its my settings or tge radio or something else entirely. any help would be greatly appreciated.

I've been having the same problem. Everything will work for a few seconds then I get a "null cell state delivered" message when I check logcat. Changing APNs didn't work for me but how are you getting to the APN settings? Every time I try I just get a dialog box that tells me to insert a sim card.