My phone acts weird on the network mode 'gsm/wcdma(automode)'
It works perfectly when I select 'GSM only'. This means that I have the APNs right
But as soon as I select the automode so that I can use 3g, phone starts acting weird. For starters the internet does not work. I also lose my voice service. The bars show that I do have voice service, but on making any call the call doesn't go through, and on ending the call the call remains on the notification bar. But if I dont end the call, then it does eventually shut by itself (~15secs) and then the bars disappear and I lose service. At this point my phone has automatically gone into flight mode. On turning flight mode off... the cycle repeats (with some exceptions):
1.notification shows service coming back: 3G, full bars for voice service. (Sometimes 3g doesn't appear at all, and at this point internet does not work but I can make calls)
2.but internet does not work (but if I keep trying it might work for a few seconds. Noticed that because network mode is on auto. Notification bar shows switching to GSM, and then back to WDCMA. On repeating this the internet lasted longer ~a min or two)... and then doesn't start at all (basically its very random)
3.make a phone call and call doesn't got through, lose service and goes into flight mode
I use an unlocked rogers samsung captivate on fido network (unlocked phone on network that share the same bandwidth). I also use a custom ROM: firefly 3.0. Specs are:
model number: samsung sgh-I897
fireware version: 2.2
basband bersion: I9000UGJK4
kernel version: 2.6.32.9
I have gone back to stock rom, and even back to the custom rom I upgraded from (pheonix 4~). I have tried different modems and a lot of ROMS. I am willing to repeat it all if its necessary
Please help. I've spent over a month trying to figure this out. And relying on gsm just doesn't cut it. It would be great if someone could even point me in the right direction.
Is this a phone, sim card, or service provider issue?
I believe this is a service provider issue...do you know what bandwidths their 3g is broadcast on? The captivate can only pick up 850 and 1900 if the frequency is outside those it will not connect.
studacris said:
I believe this is a service provider issue...do you know what bandwidths their 3g is broadcast on? The captivate can only pick up 850 and 1900 if the frequency is outside those it will not connect.
Click to expand...
Click to collapse
I use fido in canada which broadcasts on 850 and 1900. I do connect to 3g, but it is only briefly. But then I lose 3g and also my voice connection.And my phone goes into airplane mode automatically! My voice service (bars are full) is consistent when I am on GSM. This is independent of the ROM I use. Why does this happen? What is the connection between 3G and voice service.
based on *#0011#
ECIO on 1900 ~ -8
ECIO on 850 ~ -12
biharibong said:
Why does this happen? What is the connection between 3G and voice service.
based on *#0011#
ECIO on 1900 ~ -8
ECIO on 850 ~ -12
Click to expand...
Click to collapse
When the phone is on 3G, voice will also use the WCDMA signal instead of GSM. So, if your phone is on 3G and it can't connect, you will likely lose the voice as well.
Some Canandian carriers have separate APN for 3G and GSM. So, just because your phone works fine in GSM mode, doesn't mean your APN is correct on 3G.
Then, some custom ROMs based on EU i9000 ROMs can't handle 850 band at all. So, you need to be careful with what kind of modem is loaded with your custom ROM.
Looks like a kernel issue. Firefly is supposed to include Speedmod kernel and it looks like you have the stock Captivate kernel which I recall does not play well with anything other than a i897 modem. I use to run across the same problem (no voice in calls even though I had signal) when I first started messing with modems/kernels. Flash the latest speedmod kernel and see if that works.
tysj said:
Looks like a kernel issue. Firefly is supposed to include Speedmod kernel and it looks like you have the stock Captivate kernel which I recall does not play well with anything other than a i897 modem. I use to run across the same problem (no voice in calls even though I had signal) when I first started messing with modems/kernels. Flash the latest speedmod kernel and see if that works.
Click to expand...
Click to collapse
+1
make sure that your modem and kernel are compatible. The KB1 modem will not play well with a I9000 based kernel.
tysj said:
Looks like a kernel issue. Firefly is supposed to include Speedmod kernel and it looks like you have the stock Captivate kernel which I recall does not play well with anything other than a i897 modem. I use to run across the same problem (no voice in calls even though I had signal) when I first started messing with modems/kernels. Flash the latest speedmod kernel and see if that works.
Click to expand...
Click to collapse
I made some assumptions and just included the kernel version. Ive never messed around with kernels. I am using the one that came with firefly:
2.6.32.9 [email protected]#32 tue apr 12
This is really odd. But my phone is fixed. 3G is working and I have no idea how. I went through my usual application download and install cycles. The only system apps that I incorporated were a cache cleaner called 'history eraser' and a service starting app called 'autostarts'. And my phone is back to normal. Something to do with freeing system resources. Anyone have any ideas? I would think Samsung would need to fix this.
Hopefully Im not speaking too soon. But in the past two months this is the only time when my 3g has worked more than 10 mins
like I thought. I spoke too soon. After a reboot, the 3g stopped working. But it does not act as oddly as before: going automatically to flight mode and my voice service works even when the setting is on gsm/wcdma(auto).
Please help. Anyone have any ideas?
If this doesn't miraculously fix itself again, I am going to reinstall everything for troubleshooting puposes. I have to figure out if this is random or if autostarts,cache cleaner and any other app makes a difference
voodoo lagfix
I read somewhere that the voodoo lagfix changes the file system and the kernel. Could this be the reason why I cant connect to 3g
Hi,
I'm with Videotron using a Internet USB stick SIM card and I can't find a way to connect to their data network.
I don't have any issue with any roms based on the official 2.3 release.
On the other roms all I have to do is change the apn to "ihvm.videotron" and everything is good but no luck so far on CM7.
Also I have a reception (2 bars right now) but 4G never connects
Any clue?
Thanks
Figured that the APN edditing was not considered. I openned the zip and modified the apn config file (/system/etc/apn-config.xml) in it then flashed and it finally worked.
I just updated to the 9/7 official nightly and messed with some settings (trying to get mms working).
Right now, if I set myself into 3g mode, I don't get any data. 4g still works.
I was doing the old mms fix where I changed the CDMA subscription to NV from RUIM/SIM and back. I still have a phone number and an IMEI, but if I switch to CDMA mode, no data.
I prefer to use 3g for battery savings, and also, I don't always get 4g coverage, so it would be nice to fix. Any ideas?
I'm not sure if it was the flash or the messing-around that caused the problem because right after flashing I was on WiFi and didn't notice if 3g still worked.
My father is using Tab2 (P3100). Running Stock OS, Unrooted. 3G Data Connection from Vodafone Delhi India.
since a month or so back he found a update notice and upgraded the Stock Firmware to Latest 4.1.2 using WIFI
Not sure but might be since then, Whenever he's On Roaming, Data Connection Won't work.
Currently He's in U.P. circle it won't connect, Voda has 3G Service here, And I use it everyday at home/city wide.
Tried following:-
1). Checked APN Settings, they are correct.
2). Checked Data Roaming in Mobile Networks.
3). Tried Switching to GSM Only, and WDMA Only, WCDMA/GSM Auto Option, All options same result.
4). Checked wifi is OFF, and Data Connection IS Enabled, using Widgets or APPS but it won't turn on
5). Took out the SIM from Tab2, and Inserted In my Android Phone and 3G/2G Connects Instantly.
6). Put A different SIM which is from my Region but as its not On Roaming, Data Works fine.
7). Checked with operator they have no clue whats wrong in the TAB.
8). Requested Fresh APN Settings from Operator and saved it, But Tab2 won't connect.
Can someone shed some light if this is a BUG in current latest firmware of Tab2 or I am getting and my brain fails to finds a solution.
Any help will be appreciated, don't let me down my fellow members pleaseeeeee
So the issue I have is I no longer have 4G. I got off an airplane and my phone had no 3G or 4G service. If I rebooted my phone or turned airplane mode off and on I would get 4G service for about 2 mins before it would switch back to 1x. Below is what I have done to try and fix the problem. Any ideas on what else I can do.
Reloaded a nightly of CM11. Did not fix anything.
Used odin to load a stock TW 4.04 rom. (still no 3g or 4g service)
Noticed that my IMEI had been earased to 0. I went to a verizon store to check my SIM card and noticed it was gone.
Used MTK NVram to restore my IMEI. (Still no 3g or 4g service)
Used the terminal command SU REBOOT NVrestore (This gave me back 3g service but I still do not have 4G service.)
I've search everywhere and cannot find a solution. Any help would be appreciated. I currently switch between CM11 and TW4.4 rom. Neither connect and preferred network is set to LTE, switching to global makes no change.
Thanks