If I enable 3g, my battery only can stay around half day. But when I only enable wifi, it was almost double the time.
Anybody know why?
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yes... same here 3g uses more data.. i find if i turn on wifi at night battery lasts longer.. and if you disable data totally it lasts even longer.
Yes, if disable all the internet connection. It can last 3 days for me.
Sent from my GT-I9000M using XDA App
That's normal and quite reasonable.
With 3g your phone has to transmit with much higher energy (since the antenae are potentially thousands of meters away). With WIFI it only has to transmit to 100-200 meters max.
Have my phone set for 2G with wifi always on.
Use wifi at home.
2G is enough for all normal syncs, and if I need more speed for anything else I temporarily switch to 3G for that.
This way a single charge last me well over 24h under normal usage. Don't even know exactly how much.
With the phone set to 3G, the same usage patern will eat a full charge in something like 8h.
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Is it possible to set to '2g only' in froyo?
So far I can only find the option to completely switch off data, but not choose the type of mobile data connection.
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Yes switching to '2g' only is easy, you can find it in wireless settings under mobile networks. It's the 'network mode' on there.
Myself I use 3G only because I listen Internet radio a lot in my car and of course 2G is not enough and if it's set to both 2G and 3G the connection breaks way too often. Of course I couldn't do that if there were areas that would not cover 3G.
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allotrios said:
That's normal and quite reasonable.
With 3g your phone has to transmit with much higher energy (since the antenae are potentially thousands of meters away). With WIFI it only has to transmit to 100-200 meters max.
Click to expand...
Click to collapse
Here is the right answer, and the battery consumption can be quit high if you have poor 3g reception or u are just between edge/3g signal the phone consume much more power when it tried to find the best signal
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Fihlvein said:
Yes switching to '2g' only is easy, you can find it in wireless settings under mobile networks. It's the 'network mode' on there.
Click to expand...
Click to collapse
In Network mode, select GSM or WCDMA for 2g?
allotrios said:
That's normal and quite reasonable.
With 3g your phone has to transmit with much higher energy (since the antenae are potentially thousands of meters away). With WIFI it only has to transmit to 100-200 meters max.
Click to expand...
Click to collapse
Is that really true? When Idle, is the phone transmitting? Or only receiving?
Just go and install JuiceDefender, It turns off 3G when screen is off. Simple. To set to 2G only then choose GSM.
aditya104 said:
in network mode, select gsm or wcdma for 2g?
Click to expand...
Click to collapse
gsm = 2g
wcdma = 3g
Related
As we all know, Galaxy S has major issues with the battery life, one of the biggest hogs being the HSDPA data connection. From my experience, HSDPA drains 5-10% per hour in standby on my Galaxy S, while the WiFi connection drains almost nothing during a 3 hours standby. So I was wondering why doesn't Samsung thought of replacing the HSDPA with 3G or even 2G (GPRS/EDGE) while the display is off? HSDPA should be active only when the connection is used by the user and not the background services like gmail sync. Push mail notifications work with slow connections like GPRS so why not give the battery a rest? Do I have a point and if I do, is there a solution?
on my phone HSPA is only on when I use data. It switches to UMTS (3G) when idle. My provider doesn't have any legacy GSM/EDGE network.
Yeah it would have to be a bit more configured than that, with screen off and data idle - for example I stream internet radio and constantly have the screen off, with 3G only speed there wouldn't be enough overhead for it to stream consistently.
Just turn data network mode off on the power menu? Puts the phone to 2g for voice and text....
Sent from my GT-I9000 using XDA App
Install superpower or juicedefender
Elvis is alive and working at Apple
zorxd said:
on my phone HSPA is only on when I use data. It switches to UMTS (3G) when idle. My provider doesn't have any legacy GSM/EDGE network.
Click to expand...
Click to collapse
Mine doesn't work this way. After leaving the phone idle for at least 30 min, when I turn it on, the H is already active. I dont think it switches so fast from 3G to HSDPA. I'll monitor it for a couple of days to see if it falls back to 3G in sleep mode.
Turning the data connection off isn't a solution, at least for me. I want the background sync to work, but not on high speed, because it drains the battery faster.
That's a nice idea indeed. Practically, however, I have 2g all the time and a widget to enable 3g/h when required for browsing etc.
Thats a really good idea. I have tried looking for a widget that switches 2g 3g but can only find widgets that provide a shortcut. Maybe some day...
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I HATE when the phone give me edge connection with 4 bars, when i have 3g connection available with 3 bars, and i must wait the phone to chose 3g again or i must go upstairs.
How i can fix this? How i can set that ONLY when i'm browsing or using app that need connection the phone go to 3g?
Shouldn't Tasker or Juice Defender be able to make such definitons? I'm wondering, too, which app to use to tell my phone e.g. "only use 2G when screen off" which would save me a lot of battery during the day working in a low reception area.
d3l1 said:
Shouldn't Tasker or Juice Defender be able to make such definitons? I'm wondering, too, which app to use to tell my phone e.g. "only use 2G when screen off" which would save me a lot of battery during the day working in a low reception area.
Click to expand...
Click to collapse
I've found chainfire superpower 0.80, but seems that ril Injection doesn't work on our Galaxy S2
I know this is one app we can try: http://forum.xda-developers.com/showthread.php?t=739530#
But it can't disable switching while do tethering. Can we have this flexible function that we can customize from Settings menu?
I noticed our SGSIII can switch off and on WIFI when the screen on and off. It's good if our SGSIII already have the function what I want and it good enough to now what we do when the screen off, it will not switch to 2G when we do tethering and downloading.
GS2 / note / s3
If network idle, it 's will auto down to 3G umts or HPDPA to keep the battery life.
1 hour with auto sync-> 1-1.5%
2g can save battery ?i think not so much with network online.
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As I remember correctly AOKP has this feature under their powersaving settings. From what I can tell from my I9000 I always lost mobile data connection entirely when turning screen back on... took 10-60 seconds to get an active 3G data connection again. That kinda really pissed me off cuz it is very likely you need your internet connection when pulling the phone out and turning the screen on ... and in that case having no connection really sucks.
So I never used that option (besides using manual 2G limitation if wanted).
xos84292 said:
GS2 / note / s3
If network idle, it 's will auto down to 3G umts or HPDPA to keep the battery life.
1 hour with auto sync-> 1-1.5%
2g can save battery ?i think not so much with network online.
Click to expand...
Click to collapse
Thanks for the info. My home town just have 2G connection. I think it's better if it directly connected via 2G, rather than the phone continuously searching 3G line.
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
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zephiK said:
If you need battery life, look for it elsewhere. The solution you are looking for isn't possible
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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.
Dear friends, good afternoon
I hope you are doing well.
Does anybody knows how to manage 2g to 3g automatically?
I mean, is there any way to let 2g working when screen is off or when is in standby (not using an APP) and in the moment that you open an APP, the 3G connections starts automatically?
I had this idea few days ago. Would be AWESOME to save Data Plans and Battery. But I am not sure if it is possible.
I already use Greenify + NFC Task + Juice Defender ultimate (to turn on and off 3g) and my battery is during around 20 hours. However, I want to reach the edge of the device.
All the best for everyone.
Heitor Amat said:
Dear friends, good afternoon
I hope you are doing well.
Does anybody knows how to manage 2g to 3g automatically?
I mean, is there any way to let 2g working when screen is off or when is in standby (not using an APP) and in the moment that you open an APP, the 3G connections starts automatically?
I had this idea few days ago. Would be AWESOME to save Data Plans and Battery. But I am not sure if it is possible.
I already use Greenify + NFC Task + Juice Defender ultimate (to turn on and off 3g) and my battery is during around 20 hours. However, I want to reach the edge of the device.
All the best for everyone.
Click to expand...
Click to collapse
If you don't use LTE, then Llama (free app) can automatically switch you from 2g to 3g when your screen turns on and back again when it turns off.
if there is data flowing, 2g will end up using more battery. if the data is flowing, it is slower on 2g, therefore it takes longer to finish. if it takes longer to finish, itll end up using more battery. ive been using lte, and have had better battery life since. i see a minimum of 5 hours screen on time.
got it
simms22 said:
if there is data flowing, 2g will end up using more battery. if the data is flowing, it is slower on 2g, therefore it takes longer to finish. if it takes longer to finish, itll end up using more battery. ive been using lte, and have had better battery life since. i see a minimum of 5 hours screen on time.
Click to expand...
Click to collapse
So basically, use 2g to save battery is not a good option?
Demonic240 said:
If you don't use LTE, then Llama (free app) can automatically switch you from 2g to 3g when your screen turns on and back again when it turns off.
Click to expand...
Click to collapse
I do not use 4g here because Gnexus 4 is not compatible with 4g frequency in Brazil (2600 mhz)
Llama works a bit like smartactions from motorola right? (i will take the weekend to explore it better)
Does Llama work as a NFC tasker as well?
Hurr durr
http://android.stackexchange.com/questions/44628/2g-versus-3g-does-it-really-save-battery
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Heitor Amat said:
So basically, use 2g to save battery is not a good option?
Click to expand...
Click to collapse
right.
i used to believe, just like you, that 2g saves battery. so id use 2g instead of 3g, and the battery would go down quicker.
simms22 said:
right.
i used to believe, just like you, that 2g saves battery. so id use 2g instead of 3g, and the battery would go down quicker.
Click to expand...
Click to collapse
I'm using 2g when i'm not surfing or downloading anything(except whatsapp and hangouts), and when i'm going to surfing etc. i'm using 3g so i can save battery. But i have to do it manually, with quick toggles this is not that hard. :good:
simms22 said:
right.
i used to believe, just like you, that 2g saves battery. so id use 2g instead of 3g, and the battery would go down quicker.
Click to expand...
Click to collapse
2g saves battery when you're connected to Wi-Fi.
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---------- Post added at 05:08 PM ---------- Previous post was at 05:05 PM ----------
Heitor Amat said:
I do not use 4g here because Gnexus 4 is not compatible with 4g frequency in Brazil (2600 mhz)
Llama works a bit like smartactions from motorola right? (i will take the weekend to explore it better)
Does Llama work as a NFC tasker as well?
Click to expand...
Click to collapse
I don't know what smartactions is, but you set conditions and actions fire off when the condition is met. NFC would require the secure settings plugin (app from store) and needs root.
As an example, when I connect to Wi-Fi, my phone switches to 2g and my pattern lock is disabled. When I disconnect from Wi-Fi, my pattern lock is re engaged and my network mode switches back to 3g.
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Demonic240 said:
2g saves battery when you're connected to Wi-Fi.
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Click to expand...
Click to collapse
its not that it saves battery, its that you are using wifi as a data connection. as soon as data will start flowing through the 2g connection, battery drains faster. its the same principle as using a 3g or lte connection over a 2g connection. heck, you can save the same amount of battery using wifi and shutting off mobile data completely.
simms22 said:
its not that it saves battery, its that you are using wifi as a data connection. as soon as data will start flowing through the 2g connection, battery drains faster. its the same principle as using a 3g or lte connection over a 2g connection. heck, you can save the same amount of battery using wifi and shutting off mobile data completely.
Click to expand...
Click to collapse
I think we're agreeing to the same thing
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