[Q] 3G not working. - ONE Q&A, Help & Troubleshooting

I have been trying to use 3G for a while and it is never connecting to 3G. It always works on EDGE.
These are the things I tried:
1. Changed the Mobile Networks setting to 4G(recommended) and 3G.
2. Dialled *#*#4636#*#*, and tried selecting all the options. On LTE and SCDMA options it doesn't select any network. But on all other options it selects EDGE network.
Subscriber and circle: Vodafone India, Karnataka Circle, Bangalore.
All are welcome to help.
Sent from my A0001 using XDA Free mobile app

Had the same issue with a network in China and fixed it by flashing a small file.
My post here: http://forum.xda-developers.com/showpost.php?p=54956980
I'm on ColorOS. Not sure if you're on CM11S or another rom but it's worth a try.

tr.supradeep said:
I have been trying to use 3G for a while and it is never connecting to 3G. It always works on EDGE.
These are the things I tried:
1. Changed the Mobile Networks setting to 4G(recommended) and 3G.
2. Dialled *#*#4636#*#*, and tried selecting all the options. On LTE and SCDMA options it doesn't select any network. But on all other options it selects EDGE network.
Subscriber and circle: Vodafone India, Karnataka Circle, Bangalore.
All are welcome to help.
Sent from my A0001 using XDA Free mobile app
Click to expand...
Click to collapse
I get the same issue, i sit on edge a lot, unless i get good reception it will go to 3g. With my nexus 4 it was never on edge.

Thank you for all your help.
It so happened that, after I updated to 33R, suddenly my 3G (HSPA) started working. And it usually connects to it, but when the signal isn't strong it connects to EDGE, but I am least bothered about that. Thanks
Sent from my A0001 using XDA Free mobile app

Related

Is LTE down in california?

I'm getting NO data right now. Is LTE down? Any why is it that every time LTE is down, I can't get 3G either
LTE outages started in the Northeast yesterday, but seem to have spread nationwide now. This will cause complete outages on LTE devices due to the switching protocols not working properly
http://www.gottabemobile.com/2011/12/07/verizon-suffering-4g-lte-outage/
I'm experiencing the same thing. Maybe they're preparing for the launch of the two new phones?
Anyhow, my coworker's 3G Droid Pro is working fine...
No data at all for me in South Florida. As for the LTE outage also knocking out our 3g... Blame the SIM card. It authenticates over the GSM (LTE) network.
Sent from my SCH-I510 using XDA App
Try calling *611 I just called and they have a message playing acknowledging the outage. (For my area at least)
Sent from my SCH-I510 using xda premium
And just like that, my data came back. But it's only 3G right now.
I love forums. Within minutes I get reassurance it's not just my phone!
Out in New Orleans, LA as well. *611 confirmed they have an outage in my area.
I haven't had any issues yet today in my 180 miles of driving. Then I had 4g disabled.
Sent from my SCH-I510 using XDA App
Mine went out around 12:45pst. I was next to a has store and they confirmed a nationwide data outage.
Strangely however of all the phones in the store, only the Bionic seemed unaffected. It had 4g when nothing else in store had either 3g or 4g. I'm back with 3g now.
Sent from my SCH-I510 using XDA App
Go to Wireless & Network setting > Mobile Networks > System selection > pick CDMA, automatic. Then you will get 3G. It's better than no data at all.
droidfever said:
Go to Wireless & Network setting > Mobile Networks > System selection > pick CDMA, automatic. Then you will get 3G. It's better than no data at all.
Click to expand...
Click to collapse
Tried this when I first noticed the outage. Didn't work. I was getting NO data whatsoever. Full bars with nothing beside it. Could only call and SMS.
Data has been working fine for me all day(North Hollywood, CA). If it matters I'm running EP4P ROM/Modems.
data back up here in San Diego, CA
droidfever said:
Go to Wireless & Network setting > Mobile Networks > System selection > pick CDMA, automatic. Then you will get 3G. It's better than no data at all.
Click to expand...
Click to collapse
Joelpatrick said:
Tried this when I first noticed the outage. Didn't work. I was getting NO data whatsoever. Full bars with nothing beside it. Could only call and SMS.
Click to expand...
Click to collapse
There is a particular protocol, which currently eludes me, that is required on a mixed LTE/CDMA network to control the switching between the two systems. That protocol is there on every part of the network, not just the LTE segments. If there is a problem with that protocol, this phone isn't going to get any data at all...it doesn't matter if there is CDMA available or not.
Voice and text aren't affected because they don't use the data segment and they don't use LTE, so they don't have to worry with that switching protocol.
FYI For everyone, Verizon just announced about 30 mins ago they have the LTE network back up and running.
I can confirm in NYC i can finally connect back on 4G.

AT&T Atrix2 in Netherland

Hi,
Any AT&T Atrix2 users in the Netherland ?
I've just arrived last week and I couldn't get a stable data connections. I know it's not a network problem because my friends don't have any problem. So I'm wondering if for some reason it's my phone (radio incompatibility maybe).
Most of the time it just won't attached to the network, other time it attached to the network but data is not flowing.
SMS/Voice call are doing fine.
ari197 said:
Hi,
Any AT&T Atrix2 users in the Netherland ?
I've just arrived last week and I couldn't get a stable data connections. I know it's not a network problem because my friends don't have any problem. So I'm wondering if for some reason it's my phone (radio incompatibility maybe).
Most of the time it just won't attached to the network, other time it attached to the network but data is not flowing.
SMS/Voice call are doing fine.
Click to expand...
Click to collapse
Settings -> Wireless & networks -> Mobile networks -> Access point names.
What APNs are listed?
Edit - You may need to add a new APN from this list: http://wiki.apnchanger.org/Netherlands
Live Vodafone...
Anyway, don't think that the problem is with the app, cause from time to time, I could have connection (a very fast one I have to say), but most of the time, no traffic are coming through.
Sent from my MB865 using xda app-developers app
ari197 said:
Live Vodafone...
Anyway, don't think that the problem is with the app, cause from time to time, I could have connection (a very fast one I have to say), but most of the time, no traffic are coming through.
Sent from my MB865 using xda app-developers app
Click to expand...
Click to collapse
And you have tried your connection from the same locations as your friends, who are also using the same mobile operator?
I use a SIM unlocked AT&T Atrix 2 in the Netherlands with no problems. I'm on T-Mobile NL and live in Amsterdam.
I have had problems with my phone failing to connect to a data network when I travel outside of the Netherlands, though. It'll get itself into a state where it won't send or receive data even with the "data roaming" option selected. I've always been able to solve it by rebooting the phone, but that's a crappy solution. Does a power cycle fix it for you?
recently ive been all around(Ger,Aus,Slo,Cze,Hun) europe with data roaming on, and i had data(and phone ofc)just fine where i wanted it. im with vodafone.
unlocked att atrix2
I think it might have something to do with the radio. Force my phone to 2G and connection is very stable.
Might be related with me living in Maastricht which is quite close to the border.
Sent from my MB865 using xda app-developers app
afaik the att 3g bands dont cover all the european 3g gsm bands, its rare but you might be unlucky... you have to see specs of a2 and your providers bands.
souljaboy said:
afaik the att 3g bands dont cover all the european 3g gsm bands, its rare but you might be unlucky... you have to see specs of a2 and your providers bands.
Click to expand...
Click to collapse
yup .. that makes a lot sense .. that would explain the stability problem .. well, no biggie .. 2G serves me just fine ..
ari197 said:
yup .. that makes a lot sense .. that would explain the stability problem .. well, no biggie .. 2G serves me just fine ..
Click to expand...
Click to collapse
Some of European providers use 900MHz band for UMTS which not supported by A2.
So in areas without 2100MHz but with 900MHz UMTS our phone will not work in 3G .
What I find it strange is, when I'm on 3G, phone and sms work just fine. I got a full signal also. That's why I don't suspect radio problem.
Sent from my MB865 using xda app-developers app
ari197 said:
What I find it strange is, when I'm on 3G, phone and sms work just fine. I got a full signal also. That's why I don't suspect radio problem.
Sent from my MB865 using xda app-developers app
Click to expand...
Click to collapse
When you're on 3G, it SHOULD work fine.
If you meant "when you're not on 3G," then that is still normal. Different radio bands handle different tasks from your phone - SMSPhone being examples. You can still be "on network" and not have 3G data connectivity.
If you take a trip to a different city in the Netherlands and your 3G works fine, you'll know the problem is with the radio bands your carrier is using/not using in your home area. If your connection is still bad, then you have an issue with your phone itself.
^^
that is correct. its not so simple as "sms works so data should too"
in this century less and less people are sending sms and calling, compared to the growth of mobile data usage. but the number of bands on the avaliable frequencies didnt grow at all. so networks adapt to it, different bands are becoming data bands, and small unused bands are becoming phone bands, and so on..

Telstra turning off frequency 2100 in Aus - will my desireS still get 3g?!

ITS at work told me today that Telstra are switching off the 2100 network tomorrow (31 Aug) and that my phone might not get data connection afterwards - has anyone else heard about this and know if it is true or not?
I find all the frequencies plus 2g, 3g hsdpa, edge nextg stuff confusing...
I've not heard this before. I, too, am fairly ignorant when it comes to mobile networks.
90% plus of my data usage is over Wi-Fi, but I'd be very miffed if I had no data connection at work done I rely on my Exchange account staying synched.
Of course, all we have to do is wait and see what happens tomorrow.
Sent from my Desire S
BillGoss said:
I've not heard this before. I, too, am fairly ignorant when it comes to mobile networks.
90% plus of my data usage is over Wi-Fi, but I'd be very miffed if I had no data connection at work done I rely on my Exchange account staying synched.
Of course, all we have to do is wait and see what happens tomorrow.
Sent from my Desire S
Click to expand...
Click to collapse
Yep, cross fingers and let's see. Reading a bit about it on whirlpool and it may be that we drop from HSDPA on 21,000 to the slower Edge on 850, hope not!
EDIT - the little signal indicator in the notification bar has changed from 'H' to 'E' for me over lunchtime... wonder if thats it. Browsing does seem a fair bit slower
E stands for Edge (2 /2.5 G) ...
Whereas., H stands for HSPDA (3/3.5G).
Try selecting WDCMA only in your Settings > Mobile Network Settings >Mobile Network mode.
This should give you only a 3G signal., if available. . Or else no network at all!
You can try switching back to GSM /WDCMA auto and be able to see the network back again.. In this mode it will select the best available option.
Sent from my HTC Desire S
Thanks for the tip. If I set my phone to WCDMA Only, I get no connection., So I've left out I WCDMA Preferred.
By the way, I don't have those setting options, but I can get there by entering *#*#4636#*#* in the phone disaster and selecting Phone Information.
Sent from my Nexus 7
Weird, I use the same shortcut to get to that menu and tried wcdma only, my data signal indicator is now 3g (sometimes H).
No idea what frequency it is using but I'm getting data and presumably it must be better than E, edge. I'm in metro Melbourne btw
Sent from my Desire S using xda premium
BillGoss said:
Thanks for the tip. If I set my phone to WCDMA Only, I get no connection., So I've left out I WCDMA Preferred.
By the way, I don't have those setting options, but I can get there by entering *#*#4636#*#* in the phone disaster and selecting Phone Information.
Sent from my Nexus 7
Click to expand...
Click to collapse
On CM10 (and I know you are running that ) you have a toggle called 2g/3g and in the settings you can change the network modes.
I have set them to 2g/3g only, because normally I'm in a WI-FI area and there 3g is useless.
Sent from my Desire S using xda app-developers app
Edit the screenshot wasn't working
I guess, the 2G/3G toggle option is the same as GSM only or WCDMA only option.
Edit : Ok, the pic in the above post just loaded... It's the same way of doing things, a bit differently though !
---------- Post added at 01:23 AM ---------- Previous post was at 01:17 AM ----------
sadsac said:
Weird, I use the same shortcut to get to that menu and tried wcdma only, my data signal indicator is now 3g (sometimes H).
No idea what frequency it is using but I'm getting data and presumably it must be better than E, edge. I'm in metro Melbourne btw
Sent from my Desire S using xda premium
Click to expand...
Click to collapse
Of course, H is a lot better than E...
In fact, H is (just) better than 3G as well.
And as far as you are getting H/3G, leave the frequency to the network Radio Engineers to handle
Sent from my Desire S.

G2X Freezes + 3G network problems

Hello -
I'm having some connection issues with my T-Mobile G2X device.
I started using it with a 2G SIM card and it worked just fine ( I'm not using it in the united states but I'm pretty sure it supports the local 3G network ).
I started playing with roms, again, everything worked fine.
A couple of months ago I switched to a 3G carrier.
I couldn't get the 3G network working, though the normal calls, sms and wifi work ok.
Sometimes the APN list just won't respond - I get inside it, it shows no entries, I create a new one, and after I press "Save", it's still empty.
Sometimes the APNs I inserted do appear, but not functioning.
I checked my sim card with other smartphones, and they manage to access it's 3g just fine.
I tried multiple roms, multiple APN settings and a Premission Fix - nothing helped.
I'm currently using the HellFire v1.8 ICS rom, but the network didn't work with GB roms as well.
In addition, I noticed that when the phone powers up after I had restarted it, it takes him quite a while to pick up the mobile signal, but maybe it has nothing to do with the phone it self, as this appeared only after I switched to my new carrier.
Any ideas how to fix this?
Also, sometimes after I finish a call, the screen goes black, and the only way to repair it is to remove and re-enter the battery. is that the "SoD" that the sticky refers to?
Thank you for your help!
To the best of my knowledge the g2x is 2g & 4g only. So you will need to get a different phone if you want 3g service.
The G2X only supports HSPA 1700/1900/2100 frequencies, which is technically 3G. But T mobile likes to call it 4G. What you should have done is check your carrier frequencies and if it supports 1700/1900/2100 frequencies then you should have no problem getting 3G/4G service. Hope it helps.
Sent from my LG-P999 using xda app-developers app
Thank you for your quick replay
my carrier uses 2100, so that shouldn't be the problem. any other ideas?
T-Mobile is 4g and 3g
Sent from my LG-P999 using xda premium
LostInNorth805 said:
The G2X only supports HSPA 1700/1900/2100 frequencies, which is technically 3G. But T mobile likes to call it 4G. What you should have done is check your carrier frequencies and if it supports 1700/1900/2100 frequencies then you should have no problem getting 3G/4G service. Hope it helps.
Sent from my LG-P999 using xda app-developers app
Click to expand...
Click to collapse
G2X doesn`t support 1900mhz only 1700/2100
---------- Post added at 06:08 PM ---------- Previous post was at 06:05 PM ----------
SkuenD said:
Thank you for your quick replay
my carrier uses 2100, so that shouldn't be the problem. any other ideas?
Click to expand...
Click to collapse
ICS roms for G2X are really buggy, if you want a fully functional phone you should go for CM7 based roms

[Q] Force S2 to 3G Networks

I am using a Galaxy S2 Skyrocket on the Dirty Unicorn rom and I was wondering how I can force my network to 3G. I have Straight Talk on AT&T and a very good LTE 4G signal but it drains my battery very quickly and I don't really need the speed of LTE and the speed of 3G works fine for the things I do.
I've tried in the Mobile Network settings to switch it to GSM/WCDMA preferred but it always immediately switches back to LTE/GSM/WCDMA mode and connects to LTE. The use only 2G networks option does not work either as it immediately gets turned back off as soon as you turn it on.
Using *#*#4636*#*# to switch the mode to WCDMA preferred or GSM preferred does not work either as it also switches back to LTE immediately after.
Is it possible to force the phone to 3G networks? On my old captivate samsung phone on a 4.2 JB rom, it was doable and it worked on 3G fine (even being a 4G enabled phone).
Here is what I've found works on AT&T but it might not work for you.
Go to mobile network settings and then Network Operators. In the Network Operators screen scan for networks. If two different networks appear select the one on the bottom. Then the 2G only button and other settings will work and stick until you reboot your phone. I have to change this every time I reboot. I hope this helps.
Sent from my SGH-I727 using xda app-developers app
Yes. That worked. Now I just need to figure out how to turn off the hspa so it just uses a 3G connection on WCDMA instead of hspa or hspa+
Sent from my SGH-I727 using xda app-developers app
I have been using this technique every time I reboot. Anyone know how to make this permanent?
Or perhaps automate it using tasker?

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