Database Users

4G and WiFi Not Compatible?

I had been having problems getting 4G at home and just noticed that if I turn off WiFi, 4G pops right up and as soon as I re-enable WiFi (which connects to my home network) 4G disconnects. Has anyone seen this behavior? When you think about it, it makes perfect sense, and since both are enabled to connect when the other one isn't, the flip-flop is automatic. But it surprised me.

its probably because sprints 4G is based on WIFI. or it just cuts off 4G cus you dont need it anymore

I believe it works the same way as WiFi and EVDO works on older phones. When you turn on WiFi it will use that as your data connection instead of EVDO regardless if it is a crappy WiFi connection.
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Sent via the Sprint HTC EVO

Yeah, it's actually pretty cool, but if you don't know about it, it gets frustrating. I called Sprint customer service and he had me go through the battery out/in routine and go outside and try, etc. So maybe they don't know about it either!
But it makes sense for Sprint, since their data plan is unlimited and they want to avoid network overloading (are you listening AT&T? LOL). The only thing you miss on WiFi are location-based sevices that rely on GPS (navigation, some weather products, etc.).

dkdontforget said:
its probably because sprints 4G is based on WIFI. or it just cuts off 4G cus you dont need it anymore
Click to expand...
Click to collapse
WiFi and 802.16e aren't all that similar. LOTS of differences between the protocols.
Maybe there's some isolation problems on your device as Sprint is using their 2.5 GHz spectrum holdings for their 4G network.

4g network and 3g network both will shut off when enabling wifi. Why have 2 forms of data going at the same time? Its not gunna use both to double your speeds.
You wont lose any GPS features. Turn on wifi and load up Google Maps, it will find your location exact.
When making calls and sending text it uses 1x so you will still receive everything except for MMS. Maybe they fixed it to where you can receive them even when on wifi with the Evo, not 100% sure.

4g and WiFi are both data only connections. You don't need two data connections simultaneously so it is smart enough to auto disable one to save battery. It would also cause routing problems.

Every phone does this LOL When you switch on Wifi they turn off 2g,3g,4g etc because you can't use 2 data connections at the same time.
I'm curious why you would want 4g and wifi on at the same time?

I thought this was pretty common knowledge (on any Android phone)... And I also thought it was done for battery conservation reasons as much as anything else. WiFi's a simpler point to point connection and from what I understand it sucks less power than 3G or 4G which is constantly checking for additional cell towers in case you've moved, etc.
If you're at home or at work w/a stable WiFi connection you should be able to preserve more battery power by using it, within the settings you can even set it so the phone doesn't revert to 3G when it goes to sleep (the default setting IIRC), otherwise it does this and only jumps back to WiFi when you wake it ('till you're out of range anyway).

I agree with all the comments. And if the Sprint Customer Service guys had said, "Hey, you idiot...it's supposed to do that," then I wouldn't have posted. But the fact that he was as stumped as I was prompted me to post (we all know that Sprint gets all it's info from reading these forums...LOL).

STOP taking the Network Mode away AT&T!!!

I love my new Galaxy S III, but once again I have no way to force HSPA+ only. I need this option while my phone sits in my desk all day. If I can turn LTE off then I can save battery life and still get calls/texts/emails.
STOP IT AT&T, JUST STOP IT!!! Your really starting to really aggravate your customers by not allowing them to select their preferred network.
I want the network mode option in mobile networks:
GSM/HSPA/LTE (Auto)
GSM/HSPA (Auto)
HSPA (only)
GSM (only)
STOP taking this off all your phones. Every other GSM carrier in the world allows this except you!!!
I hope ALL developers add this toggle in all the upcoming roms.

Your best bet until this is added/fixed, is to turn on wi-fi mode and turn off the mobile data connection.
That way you still can make calls, and have the wifi as your data, and if its off it wont use as much power as HSPA/LTE.

mastarifla said:
Your best bet until this is added/fixed, is to turn on wi-fi mode and turn off the mobile data connection.
That way you still can make calls, and have the wifi as your data, and if its off it wont use as much power as HSPA/LTE.
Click to expand...
Click to collapse
I think you kind of missed the point...
Let's say your at work all day and you don't use your phone much? Let's say your phone gets 1 bar of LTE and 4 of HSPA+. The signal constantly fluctuates ultimately leading to a dead battery much faster.
Wouldn't it be great to just turn LTE off? That way my phone gets a better signal and uses less battery life. Not to mention, I can still receive calls, texts, and e-mails, whereas airplane mode disables everything.
Wi-Fi isn't available everywhere.
PS: AT&T ain't adding ****, they released their first LTE device in November of 2011 and it also lacked this option.

I think you missed the point as well
The reason for turning on wi-fi is to direct the data connection to something other than the chip used for HSPA/LTE. I'm not looking to use the wi-fi connection as an alternative data source. I'm using it to prevent as much battery drain as possible whenever I am not using the phone.
It essentially IS turning off LTE, but it also is turning off your data, and if you don't have wi-fi then you wont have a data connection, but if you do then you will.
Airplane mode is just taking it a step further and blocking calls as well.

So there's no way to turn off LTE? Even via a 4g/3g toggle from the app store?

916x10 said:
So there's no way to turn off LTE? Even via a 4g/3g toggle from the app store?
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Click to collapse
Nope, that's not how it worked on the HTC One X... even dialer codes would just reset on exiting. LTE stays on for some stupid reason with ATT.
A bet a toggle with root requirements will come out later./

mastarifla said:
I think you missed the point as well
The reason for turning on wi-fi is to direct the data connection to something other than the chip used for HSPA/LTE. I'm not looking to use the wi-fi connection as an alternative data source. I'm using it to prevent as much battery drain as possible whenever I am not using the phone.
It essentially IS turning off LTE, but it also is turning off your data, and if you don't have wi-fi then you wont have a data connection, but if you do then you will.
Airplane mode is just taking it a step further and blocking calls as well.
Click to expand...
Click to collapse
Ok? What if you don't have Wifi and your in a very spotty LTE area with fluctuating signal?
Nevertheless, we need the toggle!!!

What about an APN switcher, would that work?

916x10 said:
What about an APN switcher, would that work?
Click to expand...
Click to collapse
Nope, many have tried this but it doesn't stick. We need AT&T to add the option under mobile networks.

MattMJB0188 said:
Ok? What if you don't have Wifi and your in a very spotty LTE area with fluctuating signal?
Nevertheless, we need the toggle!!!
Click to expand...
Click to collapse
Then it would be best to turn off the Wi-fi and the Mobile Data connection, the only reason I have the Wi-fi on is if I'm in an area that has it (home, work, at&t hotspot) otherwise it is automatically turned off (I think?).
And I agree completely, I would love that feature, but until that time we have to make due with what we have, this is my solution, it isn't perfect but it works for me.

mastarifla said:
Then it would be best to turn off the Wi-fi and the Mobile Data connection, the only reason I have the Wi-fi on is if I'm in an area that has it (home, work, at&t hotspot) otherwise it is automatically turned off (I think?).
And I agree completely, I would love that feature, but until that time we have to make due with what we have, this is my solution, it isn't perfect but it works for me.
Click to expand...
Click to collapse
Yes, but like I said turning off mobile data completely turns off the data connection, whereas with this toggle we can change it to EDGE or HSPA+ only, still having a data connection.

I agree I like turning on edge only when I'm at work and home
Sent from my SAMSUNG-SGH-I747 using xda premium

I'm just hoping developers starting adding the GSM toggle via Mobile networks in their custom roms.
AT&T NEVER WILL!!!

It could be the sim card. I have a SIM card from 2007. The network toggle still works on my Thrill. Someone put a newer SIM card in their Thrill and the network toggle is gone. http://forum.xda-developers.com/showthread.php?t=1326760 post 27

cproaudio said:
It could be the sim card. I have a SIM card from 2007. The network toggle still works on my Thrill. Someone put a newer SIM card in their Thrill and the network toggle is gone. http://forum.xda-developers.com/showthread.php?t=1326760 post 27
Click to expand...
Click to collapse
And you hit the nail on the head. It's actually a mix of SIM Card and Radio. What we need is the canadian version of our radio and we will have it back.

Erm would juice defender not fix this? I still get texts and calls but it turns off my data.. plus its free! ( i bought the ultimate though)
Sent from my Axiom MAXX!!

benefit14snake said:
Erm would juice defender not fix this? I still get texts and calls but it turns off my data.. plus its free! ( i bought the ultimate though)
Sent from my Axiom MAXX!!
Click to expand...
Click to collapse
i guess technically it could since it turns off everything (Except calls) and turns it all back on every 15 minutes to check if anything was received on Att servers.
But if hes waiting for an important text or something, it would come delayed until juice defender decided to retrieve it.
not a bad idea though.

Here's an idea, since your at a desk all day, invest $1.32 on monoprice into a USB cable and charge your phone...
Sent from my HTC One X using Tapatalk 2

doctorTJ said:
i guess technically it could since it turns off everything (Except calls) and turns it all back on every 15 minutes to check if anything was received on Att servers.
But if hes waiting for an important text or something, it would come delayed until juice defender decided to retrieve it.
not a bad idea though.
Click to expand...
Click to collapse
I believe it just turns off 3g and 4g on verizon. My calls and texts are instant. Also, if you buy the app you can change frequency. Mine syncs every hour or two. It may be different with att since verizon handles their 4g in kind of a silly way.
Sent from my Axiom MAXX!!

bloodrain954 said:
Here's an idea, since your at a desk all day, invest $1.32 on monoprice into a USB cable and charge your phone...
Click to expand...
Click to collapse
You mean cycle it twice as much as necessary since AT&T has removed the functionality that's needed? :good:

Network Mode - Verizon

I noticed that by default this phone is setup to use "Global" as the preferred network mode. I'm thinking that means it'll try to use CDMA, LTE, and GSM networks. I noticed there's a setting for "LTE / CDMA" and I'm thinking this setting may save some battery because the radio software wont try to use the non-existent GSM for Verizon.
Anyone play around with this setting and notice a difference? I just switched to LTE / CDMA. I lost data until I rebooted and now everything is working fine. It's odd that it was set as Global to begin with.

I did the same thing you did. I notice no difference but it does work fine. I also tried fooling around with lte on/off app. Is there a simple widget that can be used to toggle between 4g and 3g? If I know i won't be using the phone for a while i would like to switch to 3g to save battery.

skinien said:
I noticed that by default this phone is setup to use "Global" as the preferred network mode. I'm thinking that means it'll try to use CDMA, LTE, and GSM networks. I noticed there's a setting for "LTE / CDMA" and I'm thinking this setting may save some battery because the radio software wont try to use the non-existent GSM for Verizon.
Anyone play around with this setting and notice a difference? I just switched to LTE / CDMA. I lost data until I rebooted and now everything is working fine. It's odd that it was set as Global to begin with.
Click to expand...
Click to collapse
Bump.
Sent from my HTC One XL using xda premium

recDNA said:
I did the same thing you did. I notice no difference but it does work fine. I also tried fooling around with lte on/off app. Is there a simple widget that can be used to toggle between 4g and 3g? If I know i won't be using the phone for a while i would like to switch to 3g to save battery.
Click to expand...
Click to collapse
You can download an app called Phone Info -- open it up and go down to Network mode, select CDMA (Auto) that will force 3G only.
It will remain until you reboot.
I used to do this with my OG HD and it did save quite a bit of battery but in my semi-scientific tests the difference on the Maxx HD is almost nonexistent, certainly not worth the reduction in speed or the inability to use data and voice simultaneously.

I don't know if you noticed but, data and voice simultaneously is possible even in 3g mode with the razrHD Max. The greatest android phone verizon has ever offered.
Sent from my DROID RAZR HD using xda premium

[Q] any way to kill the gsm radio, but keep data?

I don't call, and when I do, I voip. Is there any way to leave the HSPA/EDGE on while killing the battery consuming radios that take cellular calls? I wondered this while looking at the *#*#4636#*#* menu.

oldarney said:
I don't call, and when I do, I voip. Is there any way to leave the HSPA/EDGE on while killing the battery consuming radios that take cellular calls? I wondered this while looking at the *#*#4636#*#* menu.
Click to expand...
Click to collapse
It's the same radio so no you can't save power by disabling it.

I'm not sure how cellular works, but I can imagine that having push call notifications would require my phone to scream to the towers often. I wonder then, could we make a program that enables radio only when programs try to connect, like airplane mode on sleep.

If you need battery life, look for it elsewhere. The solution you are looking for isn't possible
Sent from my Nexus 4 using xda premium

zephiK said:
If you need battery life, look for it elsewhere. The solution you are looking for isn't possible
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Doesn't the nexus 7 3G already do something nifty to cut the power consumption of data? It has the same battery and it lasts just as long as the WiFi model.

oldarney said:
I'm not sure how cellular works, but I can imagine that having push call notifications would require my phone to scream to the towers often. I wonder then, could we make a program that enables radio only when programs try to connect, like airplane mode on sleep.
Click to expand...
Click to collapse
I haven't used it in a while, but I think juice defender ultimate is able to do that. It is a couple dollars from the Play Store for the ultimate version.
Sent from my Nexus 4 using xda app-developers app

oldarney said:
I don't call, and when I do, I voip. Is there any way to leave the HSPA/EDGE on while killing the battery consuming radios that take cellular calls? I wondered this while looking at the *#*#4636#*#* menu.
Click to expand...
Click to collapse
Both data and voice use the 2G radio and/or the 3G radio. (LTE is data only.) So, you can't just "shut off" voice and keep data (unless you use LTE).
The N4 essentially has 3 radios: a 2G radio (GSM/GPRS), a 3G radio (WCDMA), and an LTE radio. What you can do, is turn 1 or 2 of them off so that you are using only 2G or only 3G, or only LTE (if you are in an area where your service provider uses LTE on the AWS band). Turning off the LTE radio (off by default) certainly saves battery, but I don't think you will get that much more savings by turning off the 2G radio.

As mentioned before, it's all the same. That's like wanting to save gas by turning off the engine but still get where you are going. There's no seperate radio for data/voice. Basically WIFI is your "turn off voice but still have data" only option.

[Q] Disable Fast Dormancy

anyone know off fast dormancy??
thanks

djnord said:
anyone know off fast dormancy??
thanks
Click to expand...
Click to collapse
Yes, but fast dormancy isn't working for me. My phone is constantly on H and never switches to 3G. Do you see your phone switch from H to 3G when idling?

I just got my N4 and I definitely notice fast switching from H+ to 3G. It does seem to be when idling.

philhyde said:
I just got my N4 and I definitely notice fast switching from H+ to 3G. It does seem to be when idling.
Click to expand...
Click to collapse
Looks like it's working with only some carriers. I checked with 2 carriers in my country and it does not switch on any of those. My old S2 used to switch, so it's some setting in N4 itself and nothing to do with the carriers.

Just add ro.ril.fast.dormancy.rule=0 to your build.prop

luiseteyo said:
Just add ro.ril.fast.dormancy.rule=0 to your build.prop
Click to expand...
Click to collapse
Are you sure about that. AFAIK, ril properties differ between manufacturers so property from one manufacturer might or might not work on another.
My phone is always on H and never idles on 3G so I tried to enable fast dormancy by setting ro.ril.fast.dormancy.rule=1 and nothing changed.

On T-Mobile, my N4 will idle on HSPA-10, but will jump to HSPA-15 when I transfer data. In both cases, it will only shows "H" in the status bar.
HSPA-10 is 3G (7.2), while HSPA-15 is 4G (HSPA+).

up!

SpookyTunes said:
On T-Mobile, my N4 will idle on HSPA-10, but will jump to HSPA-15 when I transfer data. In both cases, it will only shows "H" in the status bar.
HSPA-10 is 3G (7.2), while HSPA-15 is 4G (HSPA+).
Click to expand...
Click to collapse
that's what its supposed to do, hspa+ only when data is moving.

SpookyTunes said:
On T-Mobile, my N4 will idle on HSPA-10, but will jump to HSPA-15 when I transfer data. In both cases, it will only shows "H" in the status bar.
HSPA-10 is 3G (7.2), while HSPA-15 is 4G (HSPA+).
Click to expand...
Click to collapse
Mine idles on UMTS on T-Mobile D:

Hey guys, I have extreme data transfer issues. After lots of searching, Fast Dormancy seems to be the most likely cause for this. Switching from hspa to hspap goes extremely quickly when I request data (web page, music, etc.).
However, no data is transferred for around 30 secs to 1 minute after a switch to hspap.
I've tried disabling hspap in the build.prop, this caused an unrecoverable bootloop on multiple firmwares (including stock).
Wherever hspap is available, I basically have no data connection.
I'm not the only one with the issue, multiple people on German android forums seem to experience this with the Nexus 4.
So is there a definitive way to disable FD?