Mobile Data Connection activates only when WiFi is on - Droid Ultra Q&A, Help & Troubleshooting

Hello,
after the last Droid Ultra Update to 4.4.4 I've started having this weird behavior. I'm a T-Mobile, locked bootloader.
When I'm connected to a WiFi network, the phone status bars shows signal strenght + the LTE or HSDPA symbols
When I'm NOT connect to a WiFi network the LTE or H(SDPA) icon goes away... I can do phone calls but mobile data is indeed disabled. I've double checked all the settings menu entries and data should be enabled - also the APN settings are fine ... even so the LTE/H icons appears only once I connect to WiFi.
It' driving me crazy.
Thanks.

When you turn on hotspot 4GLTE logo shows up, right? Unfortunate for everyone. It is some problem with the system which Verizon has populated the build.prop to disable the data outside of Verizon. Nothing could be done, as far as I could tell, until root is achieved (bootloader unlock).

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Rooted
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Ancel's 3G Network works in 2100Mhz. In the about section Mobile network type goes from UMTS to EDGE to HDSPA all the time, Service State "In service" and Mobile Network State from connecting to disconnected all the time.
When I start sending a MMS, Mobile Network State goes to "connected", the phone displays a little 3G icon with two grey arrows at the top of the screen, but the MMS never sends. The icon eventually goes away, the Mobile Network State goes back to disconnected and connecting and the message never gets "sent".
Can anyone help me? Thank you.
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[Q] no data over wifi while roaming ATT skyrocket

here's the issue: when I'm not connected to home network, wifi won't transmit/receive data. I have /!\ sign in the taskbar with explanation "data disconnected because your phone is in roaming network". No matter what I do, data will not work over wifi. The same wifi AP works perfectly when in home network... anyone have this problem? any clue how to solve it?
Try enabling data roaming. Setting>Wireless Networks>Mobile Network Settings
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Having a similar issue. I'm about 300 miles from home (Chicago) in Door County WI. Weak Edge signal here. Data works over WiFi, but not over Edge. I continually get a notification saying "You have lost data connectivity because you left your home network with data roaming disabled". I now have it enabled, but the message sounds like I am SOL because I should have made the change before leaving.
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[Q] LTE + WLAN at same time

Hi,
today I was wondering about that. My N5 still holds a connection to LTE while it uses internet over a WLAN network. Only when I'm getting a call it switches to E/H/3G whatever to build up the phone call. Isn't it wasting battery holding up the LTE connection (LTE needs more power than the rest doesn't it?)?
Do you guys know why its made like this?
Thanks,
S3cret
Edit: Pic not showing up in thumbnails so here's a direct link:
https://dl.dropboxusercontent.com/u/52317361/Screenshot_2013-12-07-19-08-53.png
S3cret said:
Hi,
today I was wondering about that. My N5 still holds a connection to LTE while it uses internet over a WLAN network. Only when I'm getting a call it switches to E/H/3G whatever to build up the phone call. Isn't it wasting battery holding up the LTE connection (LTE needs more power than the rest doesn't it?)?
Do you guys know why its made like this?
Thanks,
S3cret
Edit: Pic not showing up in thumbnails so here's a direct link:
https://dl.dropboxusercontent.com/u/52317361/Screenshot_2013-12-07-19-08-53.png
Click to expand...
Click to collapse
Phone calls use data? It should say disconnected. Does it persist after a reboot?
Aerowinder said:
Phone calls use data? It should say disconnected. Does it persist after a reboot?
Click to expand...
Click to collapse
No it doesn't use mobile data. I'm just wondering that its still saying that the network type is LTE, cause when It's connected to a wlan the network usage would only be for phone calls and LTE does only support mobile data but no calls or sms. Just wondering why the network type isn't changing to GPRS or whatever.
S3cret said:
No it doesn't use mobile data. I'm just wondering that its still saying that the network type is LTE, cause when It's connected to a wlan the network usage would only be for phone calls and LTE does only support mobile data but no calls or sms. Just wondering why the network type isn't changing to GPRS or whatever.
Click to expand...
Click to collapse
Your picture looks normal, this screen shows the data network type, not your cell voice/sms connection. The network is LTE, but is disconnected while you are connected on Wifi.
To see what is happening, look on the status bar. It shows the Wifi icon then the cell signal strength but not LTE. When you disconnect the Wifi, the Wifi icon will disappear and LTE will appear next to the cell signal strength icon. If it is doing that, all is working correctly.
alistairs1 said:
Your picture looks normal, this screen shows the data network type, not your cell voice/sms connection. The network is LTE, but is disconnected while you are connected on Wifi.
To see what is happening, look on the status bar. It shows the Wifi icon then the cell signal strength but not LTE. When you disconnect the Wifi, the Wifi icon will disappear and LTE will appear next to the cell signal strength icon. If it is doing that, all is working correctly.
Click to expand...
Click to collapse
Yup its doing right that.
Still a little weird for me^^
Nvm, thank you guys.

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Hello, I am traveling internationally and have decided to use Wifi Calling to avoid getting charged for international calls.
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