Problem: wifi on turns mobile data off - Galaxy S III Q&A, (US Carriers)

I am having a problem where any time I turn my wife on, my mobile data turns off (no 4G or 3g icon, also network signal info app shows no data). Is this a designed feature or is it a bug? Running stock Rogers firmware I747MVLLE8.

tdunks said:
I am having a problem where any time I turn my wife on, my mobile data turns off (no 4G or 3g icon, also network signal info app shows no data). Is this a designed feature or is it a bug? Running stock Rogers firmware I747MVLLE8.
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Well that's your problem bud. You're turning your wife on, not the wifi But on a serious note, this is an intended feature of android. When you turn on wifi it turns off mobile data to save your mobile data. If you dont mind me asking, why do you want your 4G to stay put if you are on wifi?

tdunks said:
I am having a problem where any time I turn my wife on, my mobile data turns off (no 4G or 3g icon, also network signal info app shows no data). Is this a designed feature or is it a bug? Running stock Rogers firmware I747MVLLE8.
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Avoid showering. Your wife won't get turned on as often. Problem solved.
Sorry. Couldn't resist the auto-correct fail... If you're on wifi, your 4g/3g automatically shuts off. That's normal.
Sent from my MB855 using xda app-developers app

tdunks said:
I am having a problem where any time I turn my wife on, my mobile data turns off (no 4G or 3g icon, also network signal info app shows no data). Is this a designed feature or is it a bug? Running stock Rogers firmware I747MVLLE8.
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It's definitely a "power saving feature" built into Android.
Sent from my SGH-T999 using xda premium

itsjusttim said:
It's definitely a "power saving feature" built into Android.
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Click to collapse
Yup but if you text or send pic messages it will switch to mobile network temporarily to send or receive those text and mms
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aznmode said:
Yup but if you text or send pic messages it will switch to mobile network temporarily to send or receive those text and mms
Sent from my SGH-T999 using Tapatalk 2
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Click to collapse
thats how it is on all android phones i blve at least all the ones ive had it wont send or rec pic msgs over wifi so it goes to the network then back to wifi

Alright thanks guys. Is there any way to turn this feature off? I want to keep mobile data on because I have really bad service at my house and I am trying to analyse it a bit.

You can just turn wifi off. You can't be connected to 2 data sources at the same time (that isn't an android thing). If wifi is off, you'll connect using 3g/4g instead.
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Related

[Q] While on Wifi is 3G off?

If my evo 3d is connected to wifi, does 3g automatically turn off? and can I receive calls/texts over wifi?
If wifi is in use, 3G gets disabled (atleast that's how mine is). And you can't receive calls and texts via wifi but you will still receive them with your cell's radio (not 3G though)
Sent from my PG86100 using XDA App
But your phone will activate the 3G radio in order to send or receive MMS. MMS does not send or receive over WiFi regardless of circumstances.
Does WiFi or 3g use more battery?
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LostRib said:
Does WiFi or 3g use more battery?
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Click to collapse
3g uses more
3G is only data not phone service. Meaning u can still receive sms and phone calls if 3G is turned off.
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ZachPA said:
But your phone will activate the 3G radio in order to send or receive MMS. MMS does not send or receive over WiFi regardless of circumstances.
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Click to collapse
Uhh I send/receive mms over WiFi all the time...
dr_acula_sxe said:
3G is only data not phone service. Meaning u can still receive sms and phone calls if 3G is turned off.
Sent from my PG86100 using XDA Premium App
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Click to collapse
I noticed when wifi is on/connected I can turn off the mobile network in quick settings
DDiaz007 said:
Uhh I send/receive mms over WiFi all the time...
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Click to collapse
If you actually watch your notification bar, 3g turns on momentarily for the mms send and receive
Sent from my PG86100 using XDA Premium App
It's all automatic. In order of power usage (highest to lowest)
4G -> 3G -> Wifi
You don't have to manually turn off 3G; the phone puts it to sleep when you go to either 4G or Wifi, and only turns it on if and when you need it. Again, it's all automatic.
LostRib said:
I noticed when wifi is on/connected I can turn off the mobile network in quick settings
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Yeah u can turn it off and still receive text and calls. Like right now I'm on WiFi with mobile network off.
Turning it off when u do not need data will save battery also.
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DDiaz007 said:
Uhh I send/receive mms over WiFi all the time...
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Click to collapse
you sure bout that? lol
If at night I just turn off mobile network, then nothing will sync right? Then I don't have to mess with turning background data off and on. And I'll still get texts and calls
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LostRib said:
If at night I just turn off mobile network, then nothing will sync right? Then I don't have to mess with turning background data off and on. And I'll still get texts and calls
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Click to collapse
Right. As long as wifi is disabled as well then nothing will sync. And you will still get calls and texts.
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Excellent. A couple less steps for me
Sent from my PG86100 using XDA App
You don't have to do anything! 3G goes to sleep as soon as you connect to a Wifi network. Turning off Mobile Network just adds an extra step to your routine.
DDiaz007 said:
Uhh I send/receive mms over WiFi all the time...
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Click to collapse
actually on most phones it will drop to "1X" because it doesnt use wifi or 3G. it will still say "3G" if data is turned on in some cases because that is the way the software programmers intended it to be. if no data or wifi it can still send a text because it uses a different type of data transfer than when you are browsing the internet or doing any other type of data transfer.
thats the way i understand it and i think im right. please correct me if im wrong.
Happy Flashing! (oh wait, this isn't the 4g forum)
Happy Daydreaming! (oh lord, please let my 3D get root)
ZachPA said:
But your phone will activate the 3G radio in order to send or receive MMS. MMS does not send or receive over WiFi regardless of circumstances.
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Click to collapse
Mms does send over WiFi and 4G n sense 3.0
Sent from my PG86100 using Tapatalk
ZachPA said:
But your phone will activate the 3G radio in order to send or receive MMS. MMS does not send or receive over WiFi regardless of circumstances.
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Click to collapse
I wish mine would, Ill totally forget that I have wifi on and my mms messages wont send until I disable it....which is a pain in the ass when you are uin hurry or totally forget its on,....

3G

Anyone have this problem? My 3g will randomly turn off and back on.
It send to be only when I'm actively using it but I don't know for sure.
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jmb521 said:
Anyone have this problem? My 3g will randomly turn off and back on.
It send to be only when I'm actively using it but I don't know for sure.
Sent from my PG86100 using XDA App
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Click to collapse
Little bit more info needed:
Rom?
HBOOT?
Kernal?
Enable always on mobile data in your mobile network settings. Otherwise, it only turns on when a request is sent.
Sent from my 3D using InfectedRom Eternity.
I get this sometimes. I'm on a stock, un-rooted phone, with the latest OTA. I will get this even if I'm in the middle of doing something, and click on a new link. The 3G icon is just grey, and I get no connection. Never an error, about no connection. It's been happening to me for a while, and it even did this on previous phones. So, for me, it's the network, and not the Evo 3D.
*I do have "Enable always-on mobile data checked*

Any way to disable LTE 4G and 3G data?

I am always on wifi so I don't need LTE, 4G, HSPA or 3G.... is there any way I can force 2G or edge only on an AT&T locked Galaxy Note i717? I've looked all over the forums and people say go into the menu and select that option, but it doesn't work. Same with apps, don't work. I've read flashing a different modem will enable that option to work, but won't I need an unlocked phone to do so?
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Why in the world would you want to do that. Why go to 2G? Why not just turn the data off
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Justinfedor said:
Why in the world would you want to do that. Why go to 2G? Why not just turn the data off
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Well like I said I'm on wifi all day and don't need LTE killing my battery for no reason. And, so I can still send or receive pictures.
LTE/Data is automatically disabled when you connect to wifi. No need to do anything. It will turn itself on automatically to receive/send mms.
c6comp said:
LTE/Data is automatically disabled when you connect to wifi. No need to do anything. It will turn itself on automatically to receive/send mms.
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100% truth
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Im guess the op really meant to say how to turn it off when not using wifi?
otherwise, like you guys mentioned, it turns off automatcially when wifi connects
and 2G still exists?
c6comp said:
LTE/Data is automatically disabled when you connect to wifi. No need to do anything. It will turn itself on automatically to receive/send mms.
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So by forcing 2G I'm not going to see any battery improvement since it's automatically turned off since I'm always on wifi?
mazdamiata210 said:
So by forcing 2G I'm not going to see any battery improvement since it's automatically turned off since I'm always on wifi?
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...yes.
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erick161 said:
...yes.
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I find that very hard to believe since on my iPhone forcing Edge gave me almost 3 times my battery life.
mazdamiata210 said:
I find that very hard to believe since on my iPhone forcing Edge gave me almost 3 times my battery life.
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That is Apple's "innovation" for you right there. This is Android. Android turns off cellular data when on wifi and only turns it on when needed for MMS.
You notice how when on wifi you don't see a 4g icon? Send an mms and you will see it pop up long enough for the message to be sent and then disappear.
That is your phone automatically enabling/disabling cellular data when needed/not needed.
Ok, well to get this back on track I'd like to force 2G or even 3G no matter what. Any solution for me?
Dial *#*#4636#*#* and hit phone information. Scroll down and in the drop down list and choose GSM Only. Reboot.
c6comp said:
Dial *#*#4636#*#* and hit phone information. Scroll down and in the drop down list and choose GSM Only. Reboot.
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Click to collapse
There's no option for GSM only.
mazdamiata210 said:
So by forcing 2G I'm not going to see any battery improvement since it's automatically turned off since I'm always on wifi?
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Click to collapse
Nope. Even on wifi, say If you're sending or receiving MMS it will use your data (4G or LTE). Also, unless you have it turned on while the phone is asleep, your phone will switch back to 4G for downloading or synchronize data. 2G takes longer to download information because of he slower speed which causes the phone to drain battery because the phone would still be downloading the data.
-Once you go NOTE, you'd say 4 inches a Joke
-iOS = inspiring Outdated Software
SKyRocKeting727 said:
Nope. Even on wifi, say If you're sending or receiving MMS it will use your data (4G or LTE). Also, unless you have it turned on while the phone is asleep, your phone will switch back to 4G for downloading or synchronize data. 2G takes longer to download information because of he slower speed which causes the phone to drain battery because the phone would still be downloading the data.
-Once you go NOTE, you'd say 4 inches a Joke
-iOS = inspiring Outdated Software
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Click to collapse
Ok well I want it to do that via 2G
mazdamiata210 said:
There's no option for GSM only.
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Click to collapse
Thats a lie. You hit phone information and scroll down. Click the dropbox and it says gsm only.
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Justinfedor said:
Thats a lie. You hit phone information and scroll down. Click the dropbox and it says gsm only.
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Click to collapse
K... if you say so...
http://db.tt/4TwHJqew
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mazdamiata210 said:
K... if you say so...
http://db.tt/4TwHJqew
Sent from my SAMSUNG-SGH-I717 using XDA
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Click to collapse
Looks like when you root and rom your phone you cant have that option. If your not in an lte area then choose lte/gsm auto. That should force u on 2G if no lte in area
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Justinfedor said:
Looks like when you root and rom your phone you cant have that option. If your not in an lte area then choose lte/gsm auto. That should force u on 2G if no lte in area
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Click to collapse
I can't select anything except for LTE/GSM/CMDA auto. If I pick anything else it reverts back to that.

[Q] MMS will not download!! (AT&T)

Hey guys, (Did extensive search before posting this)
Whenever I get a MMS the messages show a download button but will not download. I have tried turning wifi on and off, turning mobile data on and off, rebooting, using stock app and Go SMS and nothing is working. I looked in APN settings but do not know if they are right or not.
The issue just started recently, I have had the phone about a week and they seemed to work at first.
Please help,
This is driving me crazy and is frankly unacceptable in 2012. I saw some threads about old Galaxys having this issue.
You have to be on mobile data without wifi for them to download.
Sent from my GT-I9300 using Tapatalk 2
Thanks for the reply, but I have tried turning wi fi off, which in turn reverts to mobile data and still no success. Could it be that I also use a micro cell? My carrier service is literally the worst possible at my house without the micro cell. This is quite unfortunate if so.
I think wifi has to be off when it is initially coming through and yes, a micro cell will do it. Is it a voice micro cell or data?
Sent from my GT-I9300 using Tapatalk 2
Its a voice micro cell, but it also transmits a 3G signal. Not sure of the speed since I always use wi fi.
This is boggling my mind. Are you telling me that it is not possible to recieve a freaking MMS message created in 1982 (sarcastic) on a 2012 LTE device if I am in a wifi network. WTH. That is crazy to me.
So are these images gone or do I need to turn off wifi and turn off the micro cell to download?
Thanks for your help btw.
So I disconnected wifi and disconnected my microcell and clicked download on Go SMS and nothing, error message. Pulled up the stock SMS app and clicked download and after a half minute or so the picture appears. The picture then also shows in Go SMS.
I guess the solution is no MMS while at home which is a bit frustrating coming from another device/platform where this problem would not occur.
Thanks again.
I have the international GS3 on AT&T. My phone automatically downloads MMS if only mobile data is on or both wifi & mobile data are on. I believe it is your microcell causing your disruption OP.
Sorry, my international S3 also only downloads MMS if only mobile data is on.. I have yet to see it auto download when Wi-Fi was on. I would say it could be the microcell in this case though.
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joshnichols189 said:
Sorry, my international S3 also only downloads MMS if only mobile data is on.. I have yet to see it auto download when Wi-Fi was on. I would say it could be the microcell in this case though.
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Click to collapse
My International SGS III activates mobile data when downloading mms.. With wifi on or off..
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imnothimm said:
My International SGS III activates mobile data when downloading mms.. With wifi on or off..
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Weird. I am on T-Mobile though and my galaxy nexus was the same way.
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It isn't just you. I had the same issue with my GSII. It would randomly appear and disappear. Have the person resend it.
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Not true. I am on WiFi 90% of the time and I still get MMS
Sent from my SAMSUNG-SGH-I747 using xda premium
When mms comes in the WiFi should temporarily shut off and the radio picks up 3 or 4g in order to download it. U honestly won't notice any seperation. If u honestly can't receive them, check your apn settings
Sent from my vivow using Tapatalk 2
You are getting mms when you are away from your home/microcell, correct?
hmm, i just noticed that mine has been doing this lately too. MMS won't download unless I turn off wi-fi. I'm on t-mobile

Wifi (not hotspot) insight needed

Is there any reason my phone says it has a strong wifi signal but it keeps dropping wifi and starts using verizon network instead?
background:
new JB basband rooted and unloxk with jailbreak method
that's it........
Thought there may be a JB vs L4 modem and rom issue (New at this...)
Thanks
Or it may be changing settings when one first gets the phone and doesn't read (not that there is a manual) about each setting first.
Is it dropping while the screen is on? There's a setting to turn off wifi when the screen is off
Sent from my SCH-I605 using xda app-developers app
dmonger11b said:
Is it dropping while the screen is on? There's a setting to turn off wifi when the screen is off
Sent from my SCH-I605 using xda app-developers app
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Click to collapse
That's what I thought the problem was but I was wrong............
Turns out the phone jack in the kitchen died so the wife moved the phone into the office. Cut my wifi signal by half, so in those areas where it was iffy to begin with, it was switching to Verizon.
I think it is all solved........(but I thought that last time.
dmonger11b said:
Is it dropping while the screen is on? There's a setting to turn off wifi when the screen is off
Sent from my SCH-I605 using xda app-developers app
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Click to collapse
Well NOT fixed...and it is dropping when the screen is on. The always on is selected.
HELP ! ! ! !
And it's not a signal strength issue?
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dmonger11b said:
And it's not a signal strength issue?
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Click to collapse
Well.....my laptop is at 9.8 mps and the phone is getting 5 mps so there is some problem but signal strength says very strong.
When is the last time you rebooted your router?
As a pre-emptive strike, I am not interested in other devices work fine and there is no reason to because of that. They aren't using the same wifi card and they all behave differently with their own little quirks. Point in case, I have had my PC lose wifi, but my phone is fine and a router reboot clears it up.
Is it while MMS messaging? I've noticed my phone switches to 3g/4g while sending MMS, even if wifi is on.
Compared the wifes s3 side by side with my note and they dropped together so did a factory reset of the router and all is well.
Thanks for the efforts.....

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