Issue: When 4G is selected, it goes to sleep after a few minutes and then GTalk loses connectivity. IM messages sent after 4G goes to sleep aren't received (instead go to Inbox as sent while the user was offline).
I have confirmed this on two devices - Samsung Epic 4G Touch (stock non-rooted and rooted stock) and Motorola Photon 4G (stock non-rooted).
When 4G is turned off, and phone is connected via 3G, GTalk works normally, that is, if you send an IM to the user registered on the phone, GTalk wakes up and receives the IM.
How to replicate: Login to your phone, turn on 4G and then let it go to sleep. After a few minutes send an IM to the Gmail user logged into the phone. You should not receive any notification for IM (if you have notifications turned on) or, if you login to the phone, you should not see any incoming IM.
Switch off 4G and let the phone go to 3G and suddenly you will see email and IM come up.
My questions - Is it a Sprint, 4G or Android issue?
You are on to something here. I have been testing this today and it seems that they aren't coming through when 4g is sleeping.
Sent from my SPH-D710 using Xparent Blue Tapatalk
Yeap, I have been also noticing this but I thought it was just my imagination
My wife pointed it out because the E4GT belongs to her but I had no way to test since we don't get 4G at home. Today, I got a Motorola Photon 4G to test at work and I was able to replicate the issue and confirm.
I can confirm that this is an issue not just with the E4GT but with most (if not all) Sprint 4G phones. I first noticed it almost a year and a half ago on my OG EVO and I remember commenting about it on a thread on the EVO forums here on XDA but nobody seemed to confirm so I thought maybe it was just my phone.
After playing around with an Epic 4G, an EVO Shift, and an EVO 3D, I can tell you it happened on all those phones as well.
The problem seems to be in the way our phones communicate with the WiMax network. When WiMax goes to sleep, it takes our phones several seconds to wake it back up.
It super simple to duplicate the issue.
Just let 4G go to sleep then quickly go into an app that requires an internet connection (like the Android Market) and you'll see that the app tells you that you have no connection. As soon as you try again, the connection is back, so it seems it takes our phones a few seconds to wake up the connection to 4G.
Do y'all think there might be something that could be done about this annoying little quirk or are we stuck with our phones handling 4G this way?
I believe you can change the wake-up time in WiMax settings ##data# with your msl number. I changed some of my settings but I am going to have to go back and see if I can shorten the wake time more...
Sent from my SPH-D710 using Xparent Blue Tapatalk
JohnCorleone said:
I believe you can change the wake-up time in WiMax settings ##data# with your msl number. I changed some of my settings but I am going to have to go back and see if I can shorten the wake time more...
Sent from my SPH-D710 using Xparent Blue Tapatalk
Click to expand...
Click to collapse
I was just thinking the same thing.
I went into my WiMax settings just now and there's a setting called IdleSleep and the number value associated with it is 10.
Looks like that might be it.
I can't test it out right now even though I live in a 4G area. I live in a STRONG "indoor" 4G area, according to Sprint, but the reality of it is that I can't get 4G inside my apartment unless I'm standing by the window, on my head, with two fingers up my ass.
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EDIT:
Just found this thread discussing this very issue over on the original Epic's forums here on XDA: http://forum.xda-developers.com/showthread.php?t=1312681
Seems like people had success with changing the "IdleSleep" setting in WiMax from the default 10 to a more acceptable 300.
For those who don't know how to reach their 4G/WiMax settings, here's how you do this: (no, you don't need to be rooted)
1. Go to your phone's dialpad,
2. Enter ##3282#
3. Tap on "View"
4. Tap on "WiMax"
5. Enter your MSL code (here's how to get your MSL without calling Sprint for it)
6. Scroll to the bottom and tap "EXTENSIONS"
7. The third item on the list is called "IdleSleep," which is set to 00010. Press and hold on it until an action comes up called "Write Extension"
8. In the box provided, enter 00300
9. Press the home button to go back to your home screen and you're done.
It's my understanding that this only prevents your phone from sleeping the 4G connection too quickly but it will not make the connection wake up any faster once it does go to sleep. By default, 4G goes to sleep after 10 seconds of inactivity. By changing this setting, 4G will go to sleep after 300 seconds of inactivity (5 minutes and 20 seconds).
JohnCorleone said:
I believe you can change the wake-up time in WiMax settings ##data# with your msl number. I changed some of my settings but I am going to have to go back and see if I can shorten the wake time more...
Click to expand...
Click to collapse
I don't know much about CDMA/GSM but I do know a bit about networking in general. The behaviour we want is that after any radio goes to sleep or standby mode, part of it still keeps listening for incoming packets on either Layer 1 or 2. Also, the IP layer address must remain the same between sleep/wake-up, else, the application will have to re-negotiate the session.
On 3G, even when the radio goes to sleep, part of it listens for inbound packets. When a packet comes in, it wakes-up the phones other systems, processes the packet up to layer-3, wakes up the app and you get a notification.
With 4G, it seems as if, the stand-by thing doesn't happen at all. When it sleeps, it totally goes off the air. I suspect that is because the 4G chips are so in-efficient that the radio designers, to conserve power and keep the battery from going kaput in 30 minutes, decided to trade functionality over battery-life. When 4G goes to sleep, they do not or cannot even hand over the IP layer connection to the 3G radio. Not sure if it is a technical issue but my co-worker confirmed that switching between 3G and 4G causes IP address re-assignment. He travels on a shuttle to work everyday with a 3G/4G USB modem, and the entire road isn't covered with 4G.
So when the modem switches to 3G, his laptop loses VPN connection because the IP address changes and the VPN client terminates the IPSec session.
****, I've been trying to point this out since the day I got my phone and my threads have gotten no where(I got some discussion yesterday)
I was finding it hard to believe that one is upset about this if it's a Sprint issue. My messages would not come through for 30-40 minutes if I had my phone down while watching TV or something.
My solution is to keep it on 3g, or wifi at home.
Yesterday I changed wiimax sleep time to 300, this helped but it will also kill the battery.. IMO the phone should never lose connectivity all together, this goes against what push is meant to be.
Even after setting idle time to 300, today it went to (zzz) in the morning and I wasn't getting my emails(I tested it on the spot).. So not sure what's up.
IMO, this makes 4g totally useless unless I KNOW I'll need it, which is why I'm leaving it on 3g. We should be able to have 4g on and keep our phones functions.
Here is my thread so we can reference both.. I'd love it if it became a big issue and someone looked into it:
http://forum.xda-developers.com/showthread.php?t=1398832
---------- Post added at 10:21 AM ---------- Previous post was at 10:11 AM ----------
I've been wanting to post this on Sprint forums too, since yours is worded better with the issue stated I will use parts of it, hope that is ok.
I thought it was simply a bug in market when I first got 'no network connection' when using 4g! Being in an area most of the day where 4g is not available indoors (even when upside down and fingers inserted as stated earlier!) I find myself having to use 3g when it is not going on roam from poor connect (never finding a roam connect either , yet one more fail of poor radio and software from sprint).
jmejiaa said:
I've been wanting to post this on Sprint forums too, since yours is worded better with the issue stated I will use parts of it, hope that is ok.
Click to expand...
Click to collapse
Sure, go ahead and copy-paste it all you want
Sent from my HP Touchpad using xda premium
longhorn65 said:
I thought it was simply a bug in market when I first got 'no network connection' when using 4g! Being in an area most of the day where 4g is not available indoors (even when upside down and fingers inserted as stated earlier!) I find myself having to use 3g when it is not going on roam from poor connect (never finding a roam connect either , yet one more fail of poor radio and software from sprint).
Click to expand...
Click to collapse
I think we've been screwed with the 4G scam. I will go to an AT&T store and see how things work on a 4G iPhone.
Sent from my HP Touchpad using xda premium
I am pretty sure its the EntryDelay or ENTRYCINR that dictates how fast the 4g reconnects. I currently have EntryDelay at 1 and EntryCINR at 4. I am digging around for more info about making the connect time quicker
Sent from my SPH-D710 using Xparent Blue Tapatalk
If you are in a good 4g area, these settings may help. There is a 300 second delay reconnecting to 4g (entry delay) you can change it to 1. It absolutely reconnects faster. Please read OP before changing anything. Thread link...
http://forum.xda-developers.com/showthread.php?t=833332
Sent from my SPH-D710 using Xparent Blue Tapatalk
JohnCorleone said:
If you are in a good 4g area, these settings may help. There is a 300 second delay reconnecting to 4g (entry delay) you can change it to 1. It absolutely reconnects faster. Please read OP before changing anything. Thread link...
http://forum.xda-developers.com/showthread.php?t=833332
Sent from my SPH-D710 using Xparent Blue Tapatalk
Click to expand...
Click to collapse
It definitely reconnects faster once you wake the phone but the issue still persists that when 4G goes to sleep, you have no data connection at all until it wakes up again, hence push notifications and the like don't come through.
After all the reading I've done on this over the last couple of days, it seems to me like this is inherently how our 4G modems were built in order to conserve power and there's not much one can do about it. There doesn't seem to be a way to modify the way 4G sleeps so that it still listens for incoming packets like 3G does when it sleeps.
Oh well.
kindaskimpy said:
It definitely reconnects faster once you wake the phone but the issue still persists that when 4G goes to sleep, you have no data connection at all until it wakes up again, hence push notifications and the like don't come through.
After all the reading I've done on this over the last couple of days, it seems to me like this is inherently how our 4G modems were built in order to conserve power and there's not much one can do about it. There doesn't seem to be a way to modify the way 4G sleeps so that it still listens for incoming packets like 3G does when it sleeps.
Oh well.
Click to expand...
Click to collapse
Yes, I don't think it is a sleep/wake-up or reconnect time issue. The issue is that the 4G radio has to go to sleep some time and when it does it has no ability to wake itself up in response to an incoming packet. So you can delay its sleep or make it reconnect faster but while it is sleeping, the 4G radio is as good as dead.
Secondary issue is that at the radio layer, handing off a session between 3G and 4G networks while preserving the IP layer connection does not happen.
Sent from my HP Touchpad using xda premium
Yeah, if seems like an issue that's not fixable at the moment
Sent from my Nexus S 4G using xda premium
hmmm
dont forget we have all the wimax settings in ##DEBUG# too. looking into this myself right now.
THANK YOU!
4g that goes to sleep after 10 seconds is beyond worthless. I have been struggling with this for over a year and a half. Thank you!
[/B][/B]
kindaskimpy said:
I was just thinking the same thing.
I went into my WiMax settings just now and there's a setting called IdleSleep and the number value associated with it is 10.
Looks like that might be it.
I can't test it out right now even though I live in a 4G area. I live in a STRONG "indoor" 4G area, according to Sprint, but the reality of it is that I can't get 4G inside my apartment unless I'm standing by the window, on my head, with two fingers up my ass.
EDIT:
Just found this thread discussing this very issue over on the original Epic's forums here on XDA: http://forum.xda-developers.com/showthread.php?t=1312681
Seems like people had success with changing the "IdleSleep" setting in WiMax from the default 10 to a more acceptable 300.
For those who don't know how to reach their 4G/WiMax settings, here's how you do this: (no, you don't need to be rooted)
1. Go to your phone's dialpad,
2. Enter ##3282#
3. Tap on "View"
4. Tap on "WiMax"
5. Enter your MSL code (here's how to get your MSL without calling Sprint for it)
6. Scroll to the bottom and tap "EXTENSIONS"
7. The third item on the list is called "IdleSleep," which is set to 00010. Press and hold on it until an action comes up called "Write Extension"
8. In the box provided, enter 00300
9. Press the home button to go back to your home screen and you're done.
It's my understanding that this only prevents your phone from sleeping the 4G connection too quickly but it will not make the connection wake up any faster once it does go to sleep. By default, 4G goes to sleep after 10 seconds of inactivity. By changing this setting, 4G will go to sleep after 300 seconds of inactivity (5 minutes and 20 seconds).
Click to expand...
Click to collapse
Related
Hey all, I'm more of a search and learn user than a poster, but I have yet to find an answer by searching alone, so here goes.
My EVO tends to dip in and out of signal on a regular basis, but more often then not when I'm driving. For example, the phone will go from having 5 bars, to none, then back to 5 in a matter of seconds (id say about a minute). It did this 4 times on the way home from work today. I just came from T-Mobile, and I cant recall this ever happening on their GSM network. Is this a phone issue, or a typical behavior of Sprint and or CDMA networks?
Thanks!
aenima4six2 said:
Hey all, I'm more of a search and learn user than a poster, but I have yet to find an answer by searching alone, so here goes.
My EVO tends to dip in and out of signal on a regular basis, but more often then not when I'm driving. For example, the phone will go from having 5 bars, to none, then back to 5 in a matter of seconds (id say about a minute). It did this 4 times on the way home from work today. I just came from T-Mobile, and I cant recall this ever happening on their GSM network. Is this a phone issue, or a typical behavior of Sprint and or CDMA networks?
Thanks!
Click to expand...
Click to collapse
mine does this also...and i came from tmobile too, i dont think its relaly losing service... b/c if u lose service there will be an X next to the bars...i think it might just be switching towers and not doing it smoothly... b/c whenever it dips i try to make calls to make sure i still got service and what do you know it always works :/
also sometimes i notice it dips to 1 bar then back up in a matter of seconds... any idea anyone?
Yeah I agree that I still have voice service, however my data does completely stop. Its a pain cause all my background downloads get interrupted and often broken.
aenima4six2 said:
Hey all, I'm more of a search and learn user than a poster, but I have yet to find an answer by searching alone, so here goes.
My EVO tends to dip in and out of signal on a regular basis, but more often then not when I'm driving. For example, the phone will go from having 5 bars, to none, then back to 5 in a matter of seconds (id say about a minute). It did this 4 times on the way home from work today. I just came from T-Mobile, and I cant recall this ever happening on their GSM network. Is this a phone issue, or a typical behavior of Sprint and or CDMA networks?
Thanks!
Click to expand...
Click to collapse
I noticed it on occasion on AT&T but that could be because of their ****ty 3G network here.
I have noticed it on Sprint too. I never completely drop service, but I do frequently drop from 5-6 bars of EvDo down to 1-2 bars of 1xRTT then it jumps right back up. It seems to only happen when I'm driving fast
aenima4six2 said:
Yeah I agree that I still have voice service, however my data does completely stop. Its a pain cause all my background downloads get interrupted and often broken.
Click to expand...
Click to collapse
hmm not sure... i also do notice i get error codes when sending txt's sometimes... like error 107 or 97 and i think 32 before... but it hasnt occured recently... its mainly when i send txts back to back super fast... or if im sending one when someone is sending me one...
so i dunno if the port from tmobile is just bad? or what...
forgot to mention 2 of my friends evo's do the same thing... they live near me... and well it does it but i dont think as often as mine... not sure... but it seems liek all evos do it... maybe just bad service area?
I definitely don't get error codes, but the service going in and
out is really annoying. So annoying, that i may drop Sprint and return my evo.
hmm then i dunno i would call and ask, i think sprint jsut has spotty service for you, have u check the tws?
(time without service percentages)?
and did u do the cmda auto prl? after i do that it helps ALOT
How do you check the TWS? Also, by auto PRL, you are referring to the "Update PRL" feature in Software Update right?
aenima4six2 said:
How do you check the TWS? Also, by auto PRL, you are referring to the "Update PRL" feature in Software Update right?
Click to expand...
Click to collapse
go to settings and battery and batterystatus and check cell standby, then the prl thing is to set it so its CMDA and not GSM setting...
its not the update PRL there is a thread about it
http://forum.xda-developers.com/showthread.php?t=717785
"If your phone is afflicted with TWS > 0, try this procedure.
1) In dialer, dial *#*#4636#*#* to enter "Testing" app.
2) Under Phone Information, set Set preferred network type to CDMA only.
3) Exit Testing by pressing "back" key.
4) Enter Testing again.
5) Set network to CDMA auto (PRL).
6) Exit Testing again.
This fixed my TWS, and the settings stick on reboot."
btw u MIGHT have to do this everytime after reboot
Done.. I appreciate the advice. We'll see if it works. I wonder if you can use the "Network" app to do this... Also, I applied the verizon PRL hack and it worked.. However, I'm just afraid to use it before I test if it charges roaming.
Also, TWS is 3%
evo has NO roaming charges on the plans... whatsoever...
hmm your tws is low... i dont see why your signal just drops like that... mine isnt as much as you if your saying yours does it allt he time... but mine does it and it hasnt bothered me...
werd... my phone just now did the no connection to 3g... anyone else figuire out what this was?
I know there are a lot of posts about internet connection problems, but I couldn't find anything exactly like my issue.
If I only have 3g on, my Evo will connect and stay connected for a few minutes, then it will disconnect for about 20 seconds, and reconnect agaoin for another few minutes... and the cycle continues.
If I turn 4g on and 3g off, the same thing happens with the 4g.
If I have 3g and 4g on, the same things happens except sometimes 3g will be the one to connect and sometimes 4g.
Wifi works great.
My Evo is brand new and recently rooted, running Myn's Rom RLS4.
anyone had similar situation or resolutions?
THnkas!
there are only pockets of 4G so far. dont expect there to be 4G around like 3G is. as it is, 3G still isnt dat big/nation wide, but 4G is like rare. its like a needle in a haystack. the needle is 4G surrounded by the Hay/3G
Thanks,
the thing though is that my wife's unrooted Evo always maintains a strong 4g connection.
It wouldn't bother me too much the same thing happens when I use 3g. it reconnects every 5 minutes or so. Maybe rooting it caused damage?
Could flashing a different radio or wimax help?
Sent from my Evo using XDA App
Don't flash radios... that is all
For anyone with similar problem, I found my answer here and fixed my connectivity issueshttp://forum.xda-developers.com/archive/index.php/t-704845.html.
clubtech said:
I don't think it has anything to do with the ROM.
If when you are connected to 4G you can access the internet, only suddenly 4G it drops for no reason and switch to 3G and then reconnects to 4G and goes on and on, below is the solution. if when you are connected to 4G you can not access the internet at all, the below wont fix it for you and it is probably a problem with your rom.
You will need your msl code to fix this, loop up in the forums to to obtain your msl code from Sprint:
hit ##DATA# > Edit mode.
Put in your msl code
Chose WIMAX
Scroll down to Wimax_Idle_Sleep
Change the value from 10 to 300.
Click menu, commit changes and restart the phone.
This fixed it for me and i never drop 4g (when in good coverage) again.
Basically Sprint has some STUPID setting that tells 4g to go into "sleep mode" of no data is passed on the 4g connection after 10 seconds which is essentially disconnecting 4g.
The problem is it goes into sleep mode (disconnecting), but then rescans and look for a 4G signal > reconnects to 4g and if no data will be passed in 10sec it will do the same again in an endless loop.
10sec to put a connection into sleep mode is really low so change it to 300sec.
The odd thing is that this is only happening in certain locations and with certain towers.
I tried to call Sprint and explain about this issue but my attempts fell on death ears.
Go ahead and try the above. if it helps you please someone make this a sticky as you are not the first i see having the issue.
Click to expand...
Click to collapse
You'll need your msl number to do this. SImply download msl reader from the market.
Can you change any of the other settings that would make it work better?
Scan attempt
Scan retry
Thanks for this info, I gave it a try but I still cannot connect without doing a profile update and or PRL update.
Todd
chasehearn said:
For anyone with similar problem, I found my answer here and fixed my connectivity issueshttp://forum.xda-developers.com/archive/index.php/t-704845.html.
You'll need your msl number to do this. SImply download msl reader from the market.
Click to expand...
Click to collapse
I have tried to search but it doesn't like to include 4G (to short to be included) in the search box so forgive me if I wasn't bright enough to find this somewhere else.
My EVO will scan for 4G service. It then says connecting to Sprint, then flashes disconnected and scans again only to say connecting to sprint. Rinse and Repeat this process over and over. I have had this issue both on clean installs of fresh rom and currently on Koni's elite series rom. Anyone have this issue as well/and or know of a solution.
I do have a 4G MAC address so I would think that I should be able to connect.
Thanks in advance for the help
wvjw said:
I have tried to search but it doesn't like to include 4G (to short to be included) in the search box so forgive me if I wasn't bright enough to find this somewhere else.
My EVO will scan for 4G service. It then says connecting to Sprint, then flashes disconnected and scans again only to say connecting to sprint. Rinse and Repeat this process over and over. I have had this issue both on clean installs of fresh rom and currently on Koni's elite series rom. Anyone have this issue as well/and or know of a solution.
I do have a 4G MAC address so I would think that I should be able to connect.
Thanks in advance for the help
Click to expand...
Click to collapse
Well for one are you in a strong 4G coverage area?
Try shutting off your phone, pull the battery for a minute or two and restart your phone. (If you call Sprint and tell them this issue - this step will be the first one they tell you to execute)
Also you can try updating your profile and PRL, When I am having weak signals under 4G/3G - I update my profile & PRL and it always seems to fix the signal issue...
hope this helps
JS3
this happens to me when trying to connect to a 4g signal from my apartment. it will say "scanning... connecting... obtaining IP address/disconnected/scanning...connecting..." (sometimes the "obtaining ip address" does not appear) yet if i try to connect in other parts of town it connects fine. wimax sucks as far as connectivity, so until more towers appear and the signal is better there's probably no way to fix your issue. ive tried every inch of my house, and of course by the windows is slightly better. if you can manage to get a "poor" or "fair" 4g connection you'll probably end up with slower speeds than 3g anyway. it's really misleading because the software indicates the phone is trying to connect even though the signal isn't good enough to maintain a connection. clear and sprint coverage maps indicate my address and neighborhood as "best" 4g coverage too, so i have little hope of this ever improving. there is a thread for updating your ##data# values to get the phone to connect sooner and stay connected longer which i think probably helps, but not enough for me (nothing you do on your end can improve the tower signal) and even if it did, like i said you're connecting at "poor" or "fair" signal and your data speeds will often remain slower than 3g.
Sent from my PC36100 using XDA App
I am good coverage areas, my work where I am now can get it in buildings and comically my home is exactly on the line of in-home/on-street. Tried pulling the battery to same results, I think I have current PRL 60675 PRI 1.90_003. Not sure what you mean for the profile though.
Thanks for the tips.
I can connect to 4g with a poor/fair signal now, and heres how I did it if anyone cares:
flashed joeykrim's rooted stock sprint rom (5.1 I think)
updated prl through settings menu
updated profile through settings menu
use msl reader app from market to get msl code
go to dialer and type (NOT call) ##DATA#
enter MSL, go to edit mode, tap the first out of the 5 or so menu items
press menu, choose "restore" (phone will reboot or power off)
turn phone back on and enable 4g with phone on window ledge.
somewhere along the line (flashing many many different roms and wiping a lot, trying various kernels and tweaks) I had gotten stuck in the seemingly irreversible 4g/wimax connection/disconnection loop. Now I can at least connect!
Sent from my PC36100 using XDA App
Hello,
Just bought the Galaxy Nexus CDMA version and have a question. Many people suggest turning off the 4G to conserve battery. If I'm on a Wi-Fi network for most of the day, is it necessary to turn off 4G? If Wi-Fi is on (and connected), is 4G still being used and draining the battery unnecessarily? I figured Wi-Fi would "trump" 4G.
Thanks in advance for your help.
The radio is still active and maintaining the signal will sap your juice. Think of it this way: when your phone is only on 4g and you're not using it, it still drains the battery even though you're not downloading files and whatnot.
I've flashed a new rom on days where I was just home and in wifi-range and forgotten to re-toggle 4g off, and found that my battery had drained all that much more than normal.
Thanks Joe for the reply..... IMHO, it doesn't make sense to me. I wonder why 4G is active (or even 3g for that matter) with a Wi-Fi connection? It makes sense to me when you are not on Wi-Fi because you need to have the data connection (4G) readily available for data. But if you already have a connection via Wi-Fi, why do you need another data connection (3G or 4G).
I did notice this though:
1. Wi-Fi is active (blue status bars at Wi-fi status and data connection status)
2. Turn off Wi-fi (Wi-Fi status dissapears as expected)
3. 4G status is blue for about a second or two.
4. 4G status turns grey for about a second or two.
5. 4G status turns back to blue.
If 3G/4G is truly active (with Wi-Fi Connection), I would assume that the status would never turn Grey for the second or two. In past experiences with other devices, when the status was grey, I couldn't get data connections.
When you turn on wifi, it disconnects you from the 3G or LTE network. You can check this from network status.
So no, you do not need to turn off LTE if you are on wifi all the time.
adrynalyne said:
When you turn on wifi, it disconnects you from the 3G or LTE network. You can check this from network status.
So no, you do not need to turn off LTE if you are on wifi all the time.
Click to expand...
Click to collapse
Hmm well I see where it says disconnected, but I still get a signal reading and it says I am on LTE or eHRDP in the usual spot.
I understand about the radio being in a low-power state, but I was left with the impression, from my usage, that battery always seemed to drain that much more when I didn't toggle 4g off altogether. But it's been a while since I just wrote 4g off altogether so I'm going to test it again tonight when I have a chance to leave the phone undisturbed with wifi and 4g on.
JoeSyr said:
Hmm well I see where it says disconnected, but I still get a signal reading and it says I am on LTE or eHRDP in the usual spot.
I understand about the radio being in a low-power state, but I was left with the impression, from my usage, that battery always seemed to drain that much more when I didn't toggle 4g off altogether. But it's been a while since I just wrote 4g off altogether so I'm going to test it again tonight when I have a chance to leave the phone undisturbed with wifi and 4g on.
Click to expand...
Click to collapse
You can never actually turn a radio off, so you will not see a battery life difference if you set it to cdma only and use 3G while on wifi.
When you turn on WiFi it doesnt disconnect your Data connection but your phone will know when WiFi is on to use WiFi instead of Data. The only way to save power is to manually turn it off. Just remember that when you do you cannot receive or send picture texts. There may be other things im not sure. Youll still know you recieved a picture text so just make sure you turn on your Data connection before downloading it. Otherwise you have to wait for another or send one of your own to download it.
Now I dont know the situation of your area for service but here we get great 3g coverage. It serves me well for surfing the net, using Google Navigation, just about everything but videos. So why waste the power for 4g? If I need it I can get a connection quick enough but I dont usually. I dunno, For what I need using 4G is like bringing a bazooka to a knife fight. Why? Id rather leave it in the trunk of my car close by just in case
IFLATLINEI said:
When you turn on WiFi it doesnt disconnect your Data connection but your phone will know when WiFi is on to use WiFi instead of Data. The only way to save power is to manually turn it off. Just remember that when you do you cannot receive or send picture texts. There may be other things im not sure. Youll still know you recieved a picture text so just make sure you turn on your Data connection before downloading it. Otherwise you have to wait for another or send one of your own to download it.
Now I dont know the situation of your area for service but here we get great 3g coverage. It serves me well for surfing the net, using Google Navigation, just about everything but videos. So why waste the power for 4g? If I need it I can get a connection quick enough but I dont usually. I dunno, For what I need using 4G is like bringing a bazooka to a knife fight. Why? Id rather leave it in the trunk of my car close by just in case
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It does turn off data when switching to wifi. Check your network status.
To be clear, I mean mobile data network when I say data.
Look at the last item.
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"lightbox_full_screen": "Full screen",
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Thank you all for your help.
@adrynalyne -- Thanks for showing me the network status location. Didn't even notice that. You are indeed correct that it displays "disconnected" when on Wi-Fi.
@IFLATLINEI -- Regarding 3G service speeds.... in Manhattan, 3G is horribly slow. 4G is great. Even though I'm on Wi-Fi most of the the time at work, there are times when I step out for lunch and need 3G/4G. I find it somewhat cumbersome to flip back and forth from 3G to 4G..... The switching of networks seem to sometimes take up to a minute (or longer) to find the data network specified. That is why I would rather leave the phone in 4G mode when Wi-Fi is turned on.
@JoeSyr -- Let us know the results of your test. Once my phone/battery is broken in, I plan on doing the same... but I'm fairly confident that the results should be relatively close due to adrynalyne's comments.
IFLATLINEI said:
When you turn on WiFi it doesnt disconnect your Data connection but your phone will know when WiFi is on to use WiFi instead of Data. The only way to save power is to manually turn it off. Just remember that when you do you cannot receive or send picture texts. There may be other things im not sure. Youll still know you recieved a picture text so just make sure you turn on your Data connection before downloading it. Otherwise you have to wait for another or send one of your own to download it.
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Click to collapse
It definitely does not keep data on when you're on WiFi. It specifically disconnects your data network. It makes no sense to keep both enabled at once.
I seen the first 3 posts saying the same thing. Obviously there is more to it than that right? If I have both wifi and data on how would I still receive a picture text? Since as I explained before. You cannot receive a picture text without data turned on. Again turning on wifi is not turning data off. The network status seems to be telling you it will just use wifi instead. If I'm wrong address my example with picture texts. Dont just direct me to Network Status again. We already established that on the first page of the thread.
To the O.P I didn't expect you to do what I do. Just an example of how I manage to get my phone through the day. If you don't have good 3g like we do then it makes no sense to save power with my method. So you can still just turn 4g when on wifi. But unless some one can clarify what actually happens to data when wifi is turned on then I would recommend doing it manually.
On other devices, it was handled by the incoming MMS for a split second switching to the mobile network. Now on the Nexus, the uaprof is generic and uses a google server, so I don't think it matters anymore. Or maybe it switches faster than I can see it. Would be interesting to logcat it. Either way, once the MMS is received, the mobile network disconnects. I just sent an MMS and watched my network status. It never changed.
http://en.wikipedia.org/wiki/UAProf
Lol. I'm not trying to be a pain about this. Its just weird. I would really like to believe that when I turn my wifi on data was actually turned off. If its true then I can stop toggling my data connection all the time.
IFLATLINEI said:
Lol. I'm not trying to be a pain about this. Its just weird. I would really like to believe that when I turn my wifi on data was actually turned off. If its true then I can stop toggling my data connection all the time.
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Click to collapse
It effectively does. You're taking an extra completely unnecessary step by manually turning off your data when you're on WiFi.
Look at it like this. You are using more battery switching to 3g while on wifi because thats a few more seconds the soul sucking screen is on
Alright then. Settled. Thank you
Well quick update, I found that 4g vs 3g w/ wifi on came out to about the same in a single overnight test for each, as far as total battery drain goes. I couldn't stick to a completely standard testing format for timeframe and hours, but the difference was pretty negligible. 89% after 10.5 hours with 4g, 91% after just under 9 with 3g, slight differences in syncing apps grabbing some juice for either.
However, I did notice that there's an alarm coming from com.android.internal.telephony.gprs-data-stall that was waking my phone up a lot, and it did differ between the two tests. According to the people over in the better battery stats thread, this item indicates that the data connection was disrupted. The going theory there seems to be that there's a core ICS bug that's causing this to still fire when wifi is on. Apparently it's pretty common for them to get reports of it from ICS devices, but I only know as much as skimming the last few pages of that thread has told me.
For what it's worth, my gprs-data-stall count was 368 for 10.5 hours on 4g+wifi, and 89 for about 9 hours on 3g+wifi (although if this affects battery life, it's only on the order of .1% per hour according to my quick little tests). Seems like it could be due to either random interference or an ICS bug that meets different outcomes when using the 4g/3g radios. I imagine that if my phone lost and re-established a 4g data connection 368 times overnight I'd see a noticeable battery drain, so if this is a bug it might be pretty benign.
Perhaps if more people could start compiling BBS logs for wifi+data time we could get a better picture about whether there's a bug in the source that's causing the gprs-data-stall behavior.
IFLATLINEI said:
I seen the first 3 posts saying the same thing. Obviously there is more to it than that right? If I have both wifi and data on how would I still receive a picture text? Since as I explained before. You cannot receive a picture text without data turned on. Again turning on wifi is not turning data off. The network status seems to be telling you it will just use wifi instead. If I'm wrong address my example with picture texts. Dont just direct me to Network Status again. We already established that on the first page of the thread.
To the O.P I didn't expect you to do what I do. Just an example of how I manage to get my phone through the day. If you don't have good 3g like we do then it makes no sense to save power with my method. So you can still just turn 4g when on wifi. But unless some one can clarify what actually happens to data when wifi is turned on then I would recommend doing it manually.
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Click to collapse
A picture text temporarily turns on 3g data, receives it, then shuts it off. All while keeping wifi on.
This happens to me all the time.
Hopefully some of you smarter guys can help me. Where my OG used
To pick up lte it doesnt anymore. I know the signal is there because my
Daughter can still get it. Sometimes if i go to settings and switch off lte and then switch it back on I'll get a signal.
Anybody heard of yhis happening?
Make sure lte/cdma is on. Try setting Connection Optimizer to off and try updating profile. Or maybe even an airplane toggle.
Sent from my LG-LS970 using xda app-developers app
phillies1again said:
Hopefully some of you smarter guys can help me. Where my OG used
To pick up lte it doesnt anymore. I know the signal is there because my
Daughter can still get it. Sometimes if i go to settings and switch off lte and then switch it back on I'll get a signal.
Anybody heard of yhis happening?
Click to expand...
Click to collapse
They are updating a lot of towers on and off
just be patient,same in my area
You can always do ##72786# to let the phone reactivate and ensure everything sharkboy said is checked. Hope it helps
Sent from my LG-LS970 using xda premium
Mine does the same thing lte has been released since September in my area and I can't hold lte either my only option is to enable and disable airplane mode and the phone will immediately pick it up. I'm on replacement number two and all have done the same thing.
guys you can try this, go to the dialer and enter in ##3282# (##data#). go down to the advanced sub panel and edit the Next LTE Scan to 300, BSR timer to 120, BSR Max Timer to 300. You will need your MSL for this to work. Battery life will not decrease. This setting change will change the time frame cycle between scanning for a LTE signal to 2-5 minutes. For example if your connected to LTE and loose connection the phone will automaticly scan for it again in 2 minutes instead of the stock set time.
I reconnect my LGOG one last time before I shipped her off to her new owner and I quickly realize what I hated about the phone. Crappy 4g connection actually crappy radios overall.
Sent from my SPH-L900 using xda premium