Develop Bugs

[SOLVED]Can't get 4g or 3g. Only E.

I fixed it by flashing a new ROM and wiping all the data!

Someone please help! I don't know what to do!

Nevermind, I think I fixed it!

I fixed it by changing the band to GSM Preferred/GSM ALL but now I only get E. Any way I can get back 4g?

Change it back to automatic or Odin kl1 modem from rootzwiki team kang post.
DaAwesome1 said:
I fixed it by changing the band to GSM Preferred/GSM ALL but now I only get E. Any way I can get back 4g?
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Sent from my SGH-T989 using XDA App

chib1panda said:
Change it back to automatic or Odin kl1 modem from rootzwiki team kang post.
Sent from my SGH-T989 using XDA App
Click to expand...
Click to collapse
I changed it to auto, and i'm getting signal. Time to check if 4g. Thanks.
EDIT: It shows signal, but Im not getting any. Can't send text or browse web. Time to odin modem.

I flashed it, and I went to settings and looked at the network mode: It was GSM only. I changed it to auto mode. It seems to still get and send texts, and I looked at band selection with the dialer code, and there wasn't a star besides anything. I think it might've worked, but I still only get e.

By flashed I mean odined. Lol
Sent from my SGH-T989 using xda premium

I tried changing it to automatic in the band selection menu, and it showed signal, but texts didn't send.
Sent from my SGH-T989 using xda premium

Also, if it means anything, I can't change it to wcdma only in settings.
Sent from my SGH-T989 using xda premium

Can anyone help?
Sent from my SGH-T989 using xda premium

If anyone helps me get it fixed TONIGHT, I will try to donate a few dollars to them.
Sent from my SGH-T989 using xda premium

I had same issue and this is how I fixed it.
disable data connection and switch your phone off, remove the back cover and remove sim card completely. Then re-insert sim card and turn your phone back on and it should ask you to re-enable data connection once it boots up.
let me know if this helps

media_11 said:
I had same issue and this is how I fixed it.
disable data connection and switch your phone off, remove the back cover and remove sim card completely. Then re-insert sim card and turn your phone back on and it should ask you to re-enable data connection once it boots up.
let me know if this helps
Click to expand...
Click to collapse
I did this, but it didn't ask me to turn it back on, so I turned it on manually, and still only E.
Sent from my SGH-T989 using xda premium

Other phones receive 3G? Perhaps T-Mobile is servicing your area? This has happened to me but I had no control over it.

iLeopard said:
Other phones receive 3G? Perhaps T-Mobile is servicing your area? This has happened to me but I had no control over it.
Click to expand...
Click to collapse
It had 4g earlier today, plus my dad's T989 has 4g here
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Delete and re-add apn?
Sent from my SGH-T989

Did you by any chance flash a rom port?
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Weird. My issue was that I was testing a few of the skyrocket modems. After using Odin to get kl1 it worked again. Yeah i would sugeest resetting apn in wireless settings .
Sent from my SGH-T989 using XDA App

Here's what I did that messed with my 3G
I flashed skyrocket roms.
So what I did was wipe everything. Go to mounts and storage and format system. Then flash Juggernaut or any other rom you desire. Then you're done
Sent from my SGH-T989 using XDA App

*#*#4636#*#* and phone info

These menus won't work after JB update. Anyone know how to set phone to prefer 4g after the new update?
Sent from my SGH-T999 using xda app-developers app

Tmo is edge or 3g. A very fast 3g they call 4g.
Download battery monitor widget. Add the widget. Click the widget. Select tests from the menu on the bottom. Select device information. Scroll down and you can set radio preferences. Back out using the back button and it will save your setting.

jcbofkc said:
Tmo is edge or 3g. A very fast 3g they call 4g.
Download battery monitor widget. Add the widget. Click the widget. Select tests from the menu on the bottom. Select device information. Scroll down and you can set radio preferences. Back out using the back button and it will save your setting.
Click to expand...
Click to collapse
Right. No 4g per the actual definition. Good marketing ploy I guess. Is there a way to use a shortcut key code like before on ics?
Sent from my SGH-T999 using xda app-developers app

I can't find it... I wonder why they removed it.

Someone put some list together of over 30 codes. You will have to search because I am posting from my phone. The battery monitor widget works great. I have used it on all my android phones. Give it a try.
Link:
https://play.google.com/store/apps/...edium=organic&utm_term=battery+monitor+widget

mt3g said:
I can't find it... I wonder why they removed it.
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Click to collapse
When I go in the regular network settings I can't change it to wcdma only either. It's stuck on auto mode.
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I just tried setting wcdma preferred and it worked using the widget I described.

jcbofkc said:
I just tried setting wcdma preferred and it worked using the widget I described.
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Click to collapse
Just tried it. Takes you to the menu but it won't stick. I'm going to wipe and reinstall.
Sent from my SGH-T999 using xda app-developers app

I changed back to the LJ4 radio. It works the best for me. That may be the difference. Sorry. Did not think of that earlier. My bad.

jcbofkc said:
I changed back to the LJ4 radio. It works the best for me. That may be the difference. Sorry. Did not think of that earlier. My bad.
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Click to collapse
Just flashed back to root stock jb and it works fine. Just off been a rom issue? Hmm....
Sent from my SGH-T999 using xda app-developers app

Just curious... What rom did you flash after jellybean update? I plan on playing around with some of the custom roms tomorrow.

Infamous. I dirty flashed it so that may have been why the radio would not stick but, I'm not sure. Wicked is a nice ICS ROM. I have tried a few of wild's ROMs too. They were good. Haven't tried many others.
Sent from my SGH-T999 using xda app-developers app

Agree on wicked. Can't wait for v8.

Just download Phone info from the market. It's so much easier than entering the code and easier then using battery monitor
Sent from my SGH-T999 using Tapatalk 2

Download phone info from the market
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4g to 3g

I have tried posting this questions in one of the threads dedicated to a particular ROM, as I thought this would be a ROM feature, but never got an answer.
Is there a way to go back to 3g/edge when 4g seems to be too weak ? There are times when I cannot browse because 4g is too weak but it would not let me manually turn off 4g.
Is this something the ROM has to provide ? If so, has anyone seen such a feature in any ROM ?

Cm10 has a toggle that does that, I'm not sure about stock rom though.
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Deoxlar said:
Cm10 has a toggle that does that, I'm not sure about stock rom though.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
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Click to collapse
thanks ! I am on PA 2.55 , which is based on cm10 .. Any idea where can I find that ?

No data connection after flashing a new ROM? Look here for fix.

I experienced the problem of no data connection after flashing a new rom on my Optimus G. The phone needs to be reprogrammed, updating your PRL and Profile will NOT help. You must dial ##72786# this will start the handsfree activation and your phone will reboot a few times. It may take a few seconds in between steps of the activation and it will seem like nothing is happening. Just be patient and wait for everything to complete. When it is finished your phone's data connection will be working properly.

wp7chris said:
I experienced the problem of no data connection after flashing a new rom on my Optimus G. The phone needs to be reprogrammed, updating your PRL and Profile will NOT help. You must dial ##72786# this will start the handsfree activation and your phone will reboot a few times. It may take a few seconds in between steps of the activation and it will seem like nothing is happening. Just be patient and wait for everything to complete. When it is finished your phone's data connection will be working properly.
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Click to collapse
Profile update worked everytime for me.
Sent from my LG-LS970 using xda premium

eyeisdasteve said:
Profile update worked everytime for me.
Sent from my LG-LS970 using xda premium
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Click to collapse
Works everytime for me also.

Never worked for me lol idk why
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_Epic said:
Works everytime for me also.
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Click to collapse
Me as well lol
Sometimes just profile works, other times I have to do both
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skullzaflare said:
Me as well lol
Sometimes just profile works, other times I have to do both
Sent from my LG-LS970 using xda app-developers app
Click to expand...
Click to collapse
Same
Sent from my LG-LS970 using xda app-developers app

Some history,
I've been running Imperium and stockishv1 and v2 for a few days. I've made a couple backups along the way. About an hour ago I lost data. The phone works and makes calls, but my data is dead.
I've tried update profile and prl, and all I get is" Network error" I've tried this many times throughout all these steps.
I've restored backups, pre-Imperium and Stockishv1 with the same results.
I tried the procedure in this thread and still nothing.
Anybody have any other ideas? Would LGNPST restore the phones modem?

You guys need to read this. I am going to open an LGOG Issues thread but need to grab some food first.

Lokifish Marz said:
You guys need to read this. I am going to open an LGOG Issues thread but need to grab some food first.
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Click to collapse
I did, and responded in your ROM thread. Thanks
edit: Now all of a sudden data is working. BTW when my data wasn't working it still showed a flashing 3G. Sometimes. Both arrows on and off
edit 2: Also when data wasn't working, It kept wanting to roam.

saw the same thing on stock as well

engine95 said:
I did, and responded in your ROM thread. Thanks
edit: Now all of a sudden data is working. BTW when my data wasn't working it still showed a flashing 3G. Sometimes. Both arrows on and off
edit 2: Also when data wasn't working, It kept wanting to roam.
Click to expand...
Click to collapse
More than likely your area no? Sprints been working on towers
Sent from my LG-LS970 using xda app-developers app

Related:
I killed the connection optimizer while I was at work because I can't use work's wifi and listen to my icecast station I setup.
This killed my data connection and immediately put my phone into roaming. I rebooted like three times and finally my data came back (i also updated the PRL and the Profile, not sure which fixed it but something did)
From the things you guys speak of, I would guess the same issue is at hand.
ALSO: Stock rooted rom (non-deodex pure stock with bloatware frozen with titanium)

genaro12543 said:
More than likely your area no? Sprints been working on towers
Sent from my LG-LS970 using xda app-developers app
Click to expand...
Click to collapse
I thought that, but my daughters phone was fine.
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reopened the issues thread

No Data Connection
I'm pretty new here and I"m not sure where else to post this,
but I"m having a similar problem.
I am running CloudyG3 rom on Verizon LGG2 and after flash I have no data connection at all.
If anyone could help me or direct to somewhere where I can get help, I'd appreciate it. Thanks

Klyy said:
I'm pretty new here and I"m not sure where else to post this,
but I"m having a similar problem.
I am running CloudyG3 rom on Verizon LGG2 and after flash I have no data connection at all.
If anyone could help me or direct to somewhere where I can get help, I'd appreciate it. Thanks
Click to expand...
Click to collapse
Try the G2 thread, I'm sure if you post in the exact same section over there you might have better results. General answer is that it is probably APN settings. Find an app, enter them, set it, and reboot (might not need to reboot).
G2 discussion below....
http://forum.xda-developers.com/verizon-g2

No mobile network after flash

I have been a Running axis ROM for a few weeks now and wanted a change so I flashed carbon ROM. Also tried miui. Liked them but axis gives me everything I wanted however when I flashed axis again I lose mobile data. I reflashed miui and mobile data works fine. How do I fix this?
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myzterray said:
I have been a Running axis ROM for a few weeks now and wanted a change so I flashed carbon ROM. Also tried miui. Liked them but axis gives me everything I wanted however when I flashed axis again I lose mobile data. I reflashed miui and mobile data works fine. How do I fix this?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
anyone?....anyone???

myzterray said:
anyone?....anyone???
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Click to collapse
Are you wiping system/data/cache/dalvik between roms?

Yea. The only Roms will flash fine no boot loop or anything. I just have no mobile data. I'm on miui v5 and everything works. But I want axis back.
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Are you flashing a custom kernel also? If so try just the rom and see if you have mobile
Making the iPhone jealous one user at a time.

No custom kernals just whatever comes with the ROM. Now I did forget to mention I wiped internal SD at one point so I'm not sure if that wiped out my modem. However miui works fine as far as mobile data but then I wipe and try to flash axis and no data.
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myzterray said:
No custom kernals just whatever comes with the ROM. Now I did forget to mention I wiped internal SD at one point so I'm not sure if that wiped out my modem. However miui works fine as far as mobile data but then I wipe and try to flash axis and no data.
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
When you boot into the non working ROM try and dial *#06# does it show your imei?
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I ended up flashing axis again bit this time I chose tmobile instead of att. And it worked. I'm running hyper drive now with ktweaker kernel and everything is good to go. Only thing is in my settings its showing the model number as sgh T999 but everything
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Worked for a little while now its back. Had to flash miui again to get mobile data back. What's happening now is it will say 3g for a minutes then it will switch to 4glte then no signal almost instantly
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myzterray said:
Worked for a little while now its back. Had to flash miui again to get mobile data back. What's happening now is it will say 3g for a minutes then it will switch to 4glte then no signal almost instantly
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Click to expand...
Click to collapse
As asked before, does dialing *#06# show your IMEI?

Yes. I'm running miui and everything works great but if I flash any other ROM I get data for a few seconds then it goes away. I tried mobile networks then switching from auto to manual and selecting T-Mobile. One thing I did notice is on miui the APN is fast.T-Mobile.com on the others is epc.T-Mobile.com however data works on either one with miui but not with any other ROM. I've tried hyperdrive rls 15 and 16 axis and dandroid. Haven't tried any asop Roms because I use multi window a lot and I would like to use a ROM that has it.
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Okay this time I think I got it figured out. Looks like I had to change the apn settings. It was set to epc.tmobile.com I just copied down the settings from miui which were fast.t-Mobile.com and changed the apn to T-Mobile US LTE now everything works and the signal bar says 4glte but I think I'm just getting 4g. But I flashed hyper drive and no I issues at all.
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