My data only worms when sending mms? - Verizon Samsung Galaxy S III

I'm running PAC milestone.1.RC1 (4.2.2) and I'm having trouble getting my data to work. When I leave my house, turn data on and wifi off, and try to use any app that needs data, I can't even get 1x to work. But when I send a picture or receive a mms, I always get 3g or 4g instantly for about the 5-10 seconds it takes to send/download and then it's gone and doesn't come back. I've tried updating to the latest radio (mf1) and that did not work. I know the area I'm in has at least 3g because my girlfriend has a Verizon gs3 running stock and rooted and she gets 3g in the house. What else can I try without factory restoring?

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Data Usage

This is something I've been trying to figure out for a while. If I have wifi and data on at the same time, which takes precedence? Am I still eating through mobile data, despite wifi being on, or is wifi taking care of all of it?
Reason I ask is this: I'm running Scott's latest 4.2.1 build, and if I receive an MMS while my data is off, I can never actually download that MMS. It seemingly downloads, but just ends up being a blank image, even after I turn my data on. If my data is turned on, the MMS comes through as it should. It's kind of a pain to ask friends to please notify me before they send an MMS so that I can turn data on while I'm just at home where I can use wifi.
As far as I know, Wifi takes precedence. But every ROM I've tried, MMS only downloads via mobile data.
The phone will always prefer wifi if a connection is available, and fallback to data whenever it is not connected to wifi.
As for mms, gosms lets you toggle data on whenever you receive one and then lets you download it.. Not sure if the stock mms app works the same way

[Q] Cellular Data Loss When screen off for more than 3 min Straight Talk

Hey all,
I just got my nexus 5, 2 days ago. When I am NOT connected to wifi my LTE Data connection drops after my screen has been off for about 3-5 minuets. When wifi is connected I don't lose my data connection. I can still receive Texts. Yes Background data is turned on. When the screen is on I am getting great speeds. I figured this out because I was not getting notificaions. When I turn the screen on and check my notification setting panel the LTE turns orange for about a second then goes back to white.
What I have tried
1. Turn off LTE Tried 3g and 2g. I had the same problem.
2. Tried alternate APN Settings. There are many variation to choose from for straight talk with a Google search.
2a. I am a tfdata sim on straight talk, FYI
3. Factory Data Reset
4. Re-flash Stock Factory rom and recovery. I was rooted and TWRP
5. Lock Bootloader
I have a call and email out to straight talk, waiting for a response, but thought I would post and see if anyone can think of anything I might of missed. Hope I don't have to send it back to Google.
Thanks In advance
Eric
Update
Just wanted to update in case someone else runs in to these issues.
When straight talk provisioned my sim there were some errors. They were not able to correct them in the computer so have to send me a new sim. It took 4 phone calls to finally come to this conclusion. I will update again if the issue is resolved with the new sim.
As a clarification to the problem. As it turns out it had nothing to do with the screen being on or off. It happened every time my data connection went idle.
I have the exact same issue with my Straight Talk service!
Did you get the new SIM yet? Did it fix the issue?

Mobile Data Randomly Being Disabled

I have recently switched from Straight Talk to an AT&T 10 GB Mobile Share Plan. Since then my mobile data will randomly be turned off when i'm connected to wifi. It wont turn back on when i disconnect, nor when my device receives (or attempts to receive) an MMS message. Is there some setting i may have accidentally accessed since the activation? I don't have any programs that are capable of changing my device status like that (nor is my phone rooted).
Dont get me wrong, i'm glad something is trying to help me conserve battery haha, but it does get annoying since i only notice it when i get a notification that my device is unable to send/receive a picture message, or that i have no data once i leave the wifi network.
Its just weird since it has only started happening since switching to AT&T Postpaid.
AustinRawr said:
I have recently switched from Straight Talk to an AT&T 10 GB Mobile Share Plan. Since then my mobile data will randomly be turned off when i'm connected to wifi. It wont turn back on when i disconnect, nor when my device receives (or attempts to receive) an MMS message. Is there some setting i may have accidentally accessed since the activation? I don't have any programs that are capable of changing my device status like that (nor is my phone rooted).
Dont get me wrong, i'm glad something is trying to help me conserve battery haha, but it does get annoying since i only notice it when i get a notification that my device is unable to send/receive a picture message, or that i have no data once i leave the wifi network.
Its just weird since it has only started happening since switching to AT&T Postpaid.
Click to expand...
Click to collapse
Which ROM are you running? That is strange. It could be something with the APN as well. Are you on LTE or stuck on 3g? Maybe your phone is stuck in one and tries to switch from LTE to H or vice versa? I know when my phone chooses H instead of LTE (I use Cricket, but same towers) it takes quite a few seconds to get a data connection to load, but LTE is pretty quick to load.
It doesn't actually save battery to have data off when using WiFi since that is already happening behind the scenes. Not sure why yours is toggling the setting on its own but perhaps a factory reset would fix it.
MrObvious said:
Which ROM are you running? That is strange. It could be something with the APN as well. Are you on LTE or stuck on 3g? Maybe your phone is stuck in one and tries to switch from LTE to H or vice versa? I know when my phone chooses H instead of LTE (I use Cricket, but same towers) it takes quite a few seconds to get a data connection to load, but LTE is pretty quick to load.
Click to expand...
Click to collapse
Everything is stock. I had a APN automatically assigned from AT&T that caused me to constantly switch from HSPA+ to LTE. I found a better one online and now get LTE most of the time. I never really gets "stuck".Its not that the data isn't loading, its that it is literally set to "mobile data off" on my device, and i have to manually turn it back on in the settings. I wasn't aware an APN setting could change other settings on a phone?
AustinRawr said:
Everything is stock. I had a APN automatically assigned from AT&T that caused me to constantly switch from HSPA+ to LTE. I found a better one online and now get LTE most of the time. I never really gets "stuck".Its not that the data isn't loading, its that it is literally set to "mobile data off" on my device, and i have to manually turn it back on in the settings. I wasn't aware an APN setting could change other settings on a phone?
Click to expand...
Click to collapse
it could be an app doing it, and you not knowing that it can.

[Q] Cyanogenmod 11 Mobile Data Connecting

I recently bought a Moto G US GSM Unlocked and a Straight Talk Unlimited plan. I put Cyanogenmod 11 on the phone before installing the sim card, then installed the sim card and set everything up. I had to use the AT&T card for my area.
The problem I'm having is connecting to mobile data (HSDPA and HSDPA Plus). When I turn the phone on it takes several minutes for it to get a data connection. I have full bars (or some bars, depending on where I am) but no H or H+ icon, no internet connection. The same thing happens after turning off WiFi, it takes some time to get the data connection. Then after it does get the connection it cycles between H and H+ randomly.
I have researched the APN settings I should be using, and found a great thread on androidcentral with a bunch of people trying different settings. The settings I am using now let me send and receive texts and mms, and use internet. But it still takes a long time to connect when the phone first starts or I turn off WiFi.
Is this normal? If not, what could be causing this? It's frustrating because I plan on using WiFI almost exclusively while at home and turning if off when I leave. I don't really want to wait several minutes after leaving for the phone to get it's internet connection back.
Thanks

[Q] No SMS while on wifi, can't switch from wifi to cellular

My Nexus 5 is running Android 5.0.1 (Lollipop). Unlocked, not rooted. My carrier is Cricket. Here is what happens:
1. If the phone is connected to a WiFi network, I am unable to send text messages. The message will attempt sending for a while and then basically timeout. The app will report that the send failed. This will happen no matter what application I use (Hangouts, Google Messenger, chompSMS...). If I'm on the cellular network, texts send find. EDIT: Actually I'm seeing that's not actually true. Even when I'm on LTE, there's no guarantee messages will send. I can't actually detect a pattern here.
2. I am unable to switch from WiFi to cellular data by turning WiFi off. If I'm on WiFi and I disable Wifi in the Settings panel, the cellular indicator will change to show 2 or 3 bars of service with an exclamation point (!), seemingly indicating that I'm either not on the network or that I don't have data. If I reboot the phone I'll have full LTE.
I first started noticing the issues with text messaging back when I was running CM11 nightlies. Everything was fine and then a few weeks ago it started happening. I figured something had gotten messed up in those builds so I flashed to stock Lollipop but the problem persisted. I flashed to 5.0.1 and the problem remains. I also tried switching carriers from Cricket to T-Mobile, but T-Mobile service was so bad in my area that I had to switch back the next day; I didn't really get a chance to put it through its paces.
I know this is a weird one, so any ideas would be greatly appreciated. Thanks!

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