I am on straight talk and a few months ago my phone started automatically trying to switch preferred network mode from GSM/WCDMA (auto or preferred) to LTE/GSM/WCDMA every five minutes on the dot. I assume this is because straight talk now uses the LTE network as well. When my WIFI is off, the phone connects to LTE within a second or two and stops switching the preferred network. At that point, everything is fine, and the phone does what it's supposed to, seamlessly switching between LTE, HSPA+ and 3G depending on what signal is strongest.
Here's where it gets weird. If my wifi is on, then I cannot choose LTE/GSM/WCDMA as my preferred network. The phone however keeps automatically trying to switch to it every five minutes. It switches up from GSM/WCDMA preferred or auto (which are the only two i can manually choose) to LTE/GSM/WCDMA, at which point the phone doesn't get ANY signal, including cellular reception (I know because I've tried calling myself from another phone and it goes straight to voicemail). It stays there for about 30 seconds with no reception before finally giving up and reverting back to GSM/WCDMA. The signal comes back and everything is fine for five minutes, and then it automatically tries to switch up again and i lose service again for another 30 seconds. When I restart my phone, the preferred network always starts out on GSM/WCDMA auto and then starts automatically trying to switch up. It's just that if i have wifi turned off, it connects to LTE and everything's fine and if i have wifi on it does the whole cycle i described no matter what.
The only strange workaround that I've found is that if i wait for it to cycle twice while on wifi, losing reception and then reverting to 'GSM/WCDMA auto' and getting it back, i can then toggle the LTE button in the power menu twice and it stops trying to change preferred network. That only works until the next reboot, and of course means i never have LTE. It's very strange. I've tried different ROMS and different modems and it's always the same except that sometimes a different modem will change the interval between the preferred network automatically trying to change. Also it happens when the wifi is turned on, whether or not i'm actually connected to a wifi signal.
Sorry for the essay, just wanted to be thorough, as i've been searching for a long time and find many similar threads, but nothing quite describing my problem. Any help would be greatly appreciated.
Model: SAMSUNG SGH-1747
Baseband: 1747UCDLK3
Android version: 4.2.2
ROM: MROM 10.1-20131001 -d2att
Kernel :3.4.63 (i think modified, it's whatever comes with this rom)
Straight Talk wireless Unlimited Plan
Related
The problem: At home, my 3G signal is very weak - occasionally it reaches 2 out of 4 bars, often it's only one and it frequently drops out altogether causing the phone to switch to EDGE. At work, however, I get a very good 3G signal, so it would be useful to use 3G.
Now, in theory the "Auto" band setting (auto between GSM and WCDMA) ought to cover this; but in practice the 3G signal at home is just strong enough that the phone keeps trying to switch into 3G mode (and thrashing the battery) but the actual data speed I get (even over HDSPA) doesn't seem much faster than EDGE, and every time it loses the HDSPA link and drops to EDGE there's a long pause before the data starts flowing again.
I've tried switching the phone's band setting between "GSM" and "Auto", using the GSM setting at home, and Auto elsewhere; but doing that plays havoc with "Microsoft Direct Push". Switching the phone band causes the data connection to drop, which switches Direct Push off; switching Direct Push back on again loses the more detailed settings I have set in ActiveSync (where I download email manually during work hours but automatically outside of work). In addition, because the data connection is lost, any application that's using it generally has to be shut down and restarted.
Is there some way of moving the phone between "Auto" and "2G only" mode without messing up the Direct Push setting and, if possible, without severing the data connection? While actually in "Auto" mode the phone happily switches between HDSPA and EDGE without any side-effects; so it seems like there ought to be a way to tell the phone "be in Auto mode but for the moment pretend that there is no 3G signal even if there actually is a weak one", and then use that setting in weak 3G areas, switching back to normal "Auto" behaviour when you know the 3G signal has improved. Or alternatively perhaps "Auto" mode could be made to not try to switch to 3G until you get a 3-bar signal, but, once switched, try and stay with 3G until it drops to 1 bar?
The underlying problem here is that the 3G signal in my house is quite weak, but not so weak that it is undetectable. If I leave my TP2's band setting set to "Auto" then it keeps trying to switch into 3G mode, then dropping back to 2G, with a delay every time it does it. (Drains the battery too). So I'd like to be able to quickly switch between 2G and 3G mode. (Obviously I could just leave it set to 2G all the time, but this is a waste when I'm at work or in some other place which actually has a good 3G signal).
My current solution is that I've got a start menu shortcut pointing to CMBandSwitching.exe in the Windows folder. (This is the same program that is launched if you go to the TouchFLO "settings" page, then hit Communications/Phone/Band). In here I can change the Network setting between "Auto", "GSM" and "WCDMA" which has the effect of turning 3G on and off.
But... there are horrible side-effects. Switching in this way causes the current data connection to get messed up, so that nothing can actually use it to access the Internet. Web browsers stop working, and I can't receive email. I've tried switching the data connection off and back on in Communications Manager, and this works sometimes; but even when it does, it messes up my ActiveSync schedule settings. And usually I simply can't get the data connection to turn back on. More often than not, when I change the Band setting I end up having to hit the reset button to get everything functioning normally again.
There must surely be a way of turning 3G on and off without disrupting the data connection and ActiveSync settings and requiring a reboot? The phone itself can do this in "Auto" mode if I'm moving between areas of good 3G signal and zero 3G signal. Is there perhaps a way to tweak the behaviour of "Auto" mode so that it needs a higher 3G strength signal to switch to 3G? Or is there any way to convince the phone (while in Auto mode) that there isn't really a 3G signal present (even though there is really a weak signal) so that it switches to 2G in a side-effect-free fashion?
(bump)
Hm. 136 views and no reply.
You might check into WMLonglife
http://forum.xda-developers.com/showthread.php?t=478519
I haven't tried it, but it may work for you. It functions more based on what you are doing with the phone as opposed to what bands are available.
mwelch16 said:
You might check into WMLonglife
http://forum.xda-developers.com/showthread.php?t=478519
I haven't tried it, but it may work for you. It functions more based on what you are doing with the phone as opposed to what bands are available.
Click to expand...
Click to collapse
I'll check that out, thanks.
I installed room ( {Rom}{ICS} Official Global CM9), after 2 days my phone's network is disconnected. I reinstall the original room 2.3.4 but only use 2G when I used dataroaming; completely unusable 3G & network global mode always (I fullwipe data before reinstalling room 2.3.4 ; radio 1.09.01.0312 & APN properly installed). Please help me how to be able to use 3G
because my phone is example:
Unfortunately, I'm having the same problems with this ROM on HSDPA that I was having on aeroevan's ROM. GSM is found immediately on boot, however, HSDPA is very flakey. It will succeed in connecting every now and again, but then randomly drops the signal and won't reconnect. I thought maybe I just had a weak 3G signal where I was testing, but I have a BB Bold for work as well and that can easily maintain a 3G connection on the same network. I also had no problem way back in the day with CM7.2, but that ship has sailed .
Also, when the phone is in WCDMA preferred mode, after a while the phone will lose all connections (usually after a reboot but not always), including to GSM and when I go to reselect my network operator I get the message "Error while searching for networks". No matter how many times I reboot the phone or switch to "GSM Only" or "GSM/WCDMA auto" it never lets me again select my network provider.
Dude you already posted the same thing in q&a why did you post here
Sent from viperINC2...DIX
I found my phone was crashing (freeze and eventually either rebooting or needing a battery pull) seemingly randomly, and most often when I was using Navigation - eventually I realised that it was crashing when I had a poor signal (usually on my commute, when inbetween cell towers I suppose). This started happening when I was using a gingerbread ROM and then happened on every ICS and JB ROM I flashed. Turns out my phone crashed whenever it switched to 2G (because of lack of 3G signal) and tried to get data (ie navigation, tweetdeck, etc), and I could simulate the crash by settings>mobile networks>use only 2G then waiting a couple of minutes.
I found a post from edwinek on androidcentral detailing how to stop your phone switching to 2G: go to the dialer and dial *#*#4636#*#* to get to the testing menu. Choose Phone Information and scroll down to 'Set preferred network type' and change 'WCDMA preferred' to 'WCDMA only'. That sorts out the crashes.
However, there's no way to save this preference, so you have to do it every time you boot. BUT, to take care of that you can use Tasker to set it at boot (it's under Phone>Mobile data 2G/3G). Fixed!
Hope this helps someone else out!
marv
Hello guys!
Here is the deal. I hope somebody is able to help me. I have a galaxy s6 920p with the ramified ROM (OH1 version on OI1 band) that works perfectly except for this weird issue. So, i am in Peru and i unlocked my phone, it works perfectly with my local carrier on LTE or 3G depending on the coverage EXCEPT when i connect to a wireless network(WIFI), if i do so my LTE 3G icon will dissapear as expected and be replaced with the WIFI bars and i would then be on Wifi internet which is fine. The problem comes when i move away from wifi signal or turn off the WIFI myself, the signal bar will remain full and i can make and receive calls normally but there will be a "!" sign next to it indicating that the mobile data is not working, the only way to fix this is by either rebooting the phone or setting it to flight mode for around 10 seconds and then bringing it back to normal, which makes my mobile data start working normally until the next time i turn on the WIFI. I have also noticed that my APN gets unticked everytime i connect to WIFI, regardless of this sometimes (i would say 30%) if i turn off the wifi the 3g/lte connection will resume normally. I am a pilot and sometimes i keep my phone without airplane mode, in the air i lose signal but as soon as i regain ground i recover my lte/3g, so this also indicates me that is not something related to the reconnection of signal itself but something regarding the WIFI. I hope you guys have any clue of what is going on here because it is really annoying and i haven't found any info about this. TY in advance!!!!