Database Users

prevent 3G on cdma?

3G has become the clearest battery drain outside of screen usage, so I'm desperately looking for an app to shut it off when I travel for my Droid. I know that for some reason this could not be developed for Verizon like other networks because of the CDMA network, but I would imagine that a solution could be developed for rooted users since getting a Wifi signal essentially turns off 3G while still allowing for texts and calls? Could the phone be tricked into thinking it has connected to a Wifi signal? I'd pay for an app like this and I think others would too....

Go to the dialer and enter: *#*#INFO#*#*
Then go to Phone Information. Then scroll down to where it says "Set preferred network type:" and change it from CDMA auto (PRL) to CDMA only.

try juice defender in the market. it basically turnes off 3G while the phone is locked saving a ton of battery life! when you unlock the phone it turnes 3G back on! only problem is it takes a little while sometime for 3G to kick back on... but you could enable the juice defender when you want and disable it when you dont need the extra batttery life! give it a try! its free so if ya dont like it you can just get rid of it!

You can also use Quick Settings which among the other settings you can quickly change allows you to disable the use of 3G. It works great on my Milestone.

Or you could use APNDroid (on the market too). It has a widget to manually switch on/off the 3G net, but still allowing to use the phone/text.
Sent from my Milestone using XDA App

Soul_Est said:
You can also use Quick Settings which among the other settings you can quickly change allows you to disable the use of 3G. It works great on my Milestone.
Click to expand...
Click to collapse
Your milestone is GSM. Quick settings does not work for CDMA phones.
To the OP, use the widget called Easy Switch. It does 3G and GPS (among other things) with the click of the button. It doesn't take you to an options menu, it just works.

+1 on APNDroid. Simple and just works.

Another option for droid is cyanogen6. I know rc2 has 3g on/off built into droids power control widget.
Sent from my Droid using XDA App

use cynaogen...u can turn off 3g in there

Anybody notice using 3g use more battery then wifi?

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?
Sent from my GT-I9000M using XDA App

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.
Sent from my GT-I9000 using XDA App

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.
Sent from my GT-I9000 using XDA App

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.
Sent from my GT-I9000 using XDA App

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
Sent from my GT-I9000 using XDA App

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

Wifi Only version coming to USA?

Is there any evidence that the USA is getting a Wifi-only version of the 7.7?
I find it ludacris Verizon wants 699.99 for theirs.. I have no need for the radio built in and the extreme premium they are asking.. I'm itching to have this tablet and don't really want to order it online..
Unless T-mobile is getting the 7.7 with their HSPA+ network support built (I have a T-mobile unlimited data sim dying to get inside a nice tablet).
Any ideas?

Why not order the wifi version from negri? They are a us retailer and very reputable and you can have it in less than a week.
They have it at a very good price
https://negrielectronics.com/samsung-p6810-galaxy-tab-7-7-16gb-wifi-only-white.html
Sent from my GT-P6800 using xda premium

Diversion said:
Is there any evidence that the USA is getting a Wifi-only version of the 7.7?
I find it ludacris Verizon wants 699.99 for theirs.. I have no need for the radio built in and the extreme premium they are asking.. I'm itching to have this tablet and don't really want to order it online..
Unless T-mobile is getting the 7.7 with their HSPA+ network support built (I have a T-mobile unlimited data sim dying to get inside a nice tablet).
Any ideas?
Click to expand...
Click to collapse
The majority of posters in the 7.7 forum bought their 6800/6810 online. I bought two with no problems. I presume we'll see a small influx of Verizon customers in the coming weeks, though.
But, I mean...what are you going to do? Buy it online or don't get one are your two options if you don't want Verizon's version.

Do any of the 3G versions work on T-mobile's network?

The P6800 does not work on the AWS frequency that T-mobile uses. If T-mobile ever converts its network to use the 1900MHz frequency nationwide it will work but there is no time table released to show if or when that might happen.

Diversion said:
Do any of the 3G versions work on T-mobile's network?
Click to expand...
Click to collapse
To be clear, it will work, but you will only get EDGE (2G) speeds in most of the country. I understand that AWS isn't required in some areas for T-Mobile, but you should expect to surf at EDGE speeds with the P6800.

What he said. Will it work on T-Mobile? Yes. Will the 3G work and be fast? Depending on where you are, probably not...
---------- Post added at 10:02 PM ---------- Previous post was at 10:00 PM ----------
If the 7.7 does come to the US in any form other than the LTE version, then it will likely ONLY be the wifi version. Carriers don't like all-in-one devices you see... That's why the LTE version doesn't double as a phone.

I'm assuming the LTE version can fall back onto Verizon's 3g network when 4g is not available, and or has a toggle (I would hope) to force 3g instead of 4g?

Diversion said:
I'm assuming the LTE version can fall back onto Verizon's 3g network when 4g is not available, and or has a toggle (I would hope) to force 3g instead of 4g?
Click to expand...
Click to collapse
Don't know about the toggle, but I would assume that, yes, assuming there's no LTE coverage, it will fall back to CDMA2000 or 1xRTT, whichever is available.

Jade Eyed Wolf said:
Don't know about the toggle, but I would assume that, yes, assuming there's no LTE coverage, it will fall back to CDMA2000 or 1xRTT, whichever is available.
Click to expand...
Click to collapse
Correct, the device switches between CDMA and LTE coverage depending on what is available, and there is the ability to force it to CDMA only.

What i'm concerned about though, is that there's no way to turn off the cellular modem and only use Wifi. I'm assuming that when Wifi is on, the cellular radio is also turned on (even if you don't have a data plan activated on the device) causing it to use more battery by continuously checking for a signal.
Can someone confirm if you can power down the modem seperately from Wifi? I don't see the point in needing a radio always on if you're not even paying for a Verizon plan.

Diversion said:
What i'm concerned about though, is that there's no way to turn off the cellular modem and only use Wifi. I'm assuming that when Wifi is on, the cellular radio is also turned on (even if you don't have a data plan activated on the device) causing it to use more battery by continuously checking for a signal.
Can someone confirm if you can power down the modem seperately from Wifi? I don't see the point in needing a radio always on if you're not even paying for a Verizon plan.
Click to expand...
Click to collapse
Doesn't every 3G/4G/LTE android device have a setting to turn off the mobile network? I have it on my phone and I have it on my original Galaxy Tab. Why do you think it would be different on this device?

Diversion said:
What i'm concerned about though, is that there's no way to turn off the cellular modem and only use Wifi. I'm assuming that when Wifi is on, the cellular radio is also turned on (even if you don't have a data plan activated on the device) causing it to use more battery by continuously checking for a signal.
Can someone confirm if you can power down the modem seperately from Wifi? I don't see the point in needing a radio always on if you're not even paying for a Verizon plan.
Click to expand...
Click to collapse
My Droid X turns off the 3g radio when wifi is connected. It would make sense that it worked the same way on the LTE 7.7.

murmur70 said:
My Droid X turns off the 3g radio when wifi is connected. It would make sense that it worked the same way on the LTE 7.7.
Click to expand...
Click to collapse
If your phone is still reporting signal bars when connected to Wifi, the radio is still turned on and using juice.

Paten said:
Doesn't every 3G/4G/LTE android device have a setting to turn off the mobile network? I have it on my phone and I have it on my original Galaxy Tab. Why do you think it would be different on this device?
Click to expand...
Click to collapse
Guess i'll have to go back into verizon and check the settings and see if they are treated seperately. Usually all wireless (cellular and wifi) are treated as a singular on/off switch. Can't usually literally power down the cell chip and keep the Wifi chip on.
Some devices can - but I want to make sure if this one can.

Diversion said:
What i'm concerned about though, is that there's no way to turn off the cellular modem and only use Wifi. I'm assuming that when Wifi is on, the cellular radio is also turned on (even if you don't have a data plan activated on the device) causing it to use more battery by continuously checking for a signal.
Can someone confirm if you can power down the modem seperately from Wifi? I don't see the point in needing a radio always on if you're not even paying for a Verizon plan.
Click to expand...
Click to collapse
(I wish XDA would move the Thanks button away from the Quote!)
Disabling Packet data will work fine. You can also put it in Airplane mode then just enable the radios you need.

burhanistan said:
(I wish XDA would move the Thanks button away from the Quote!)
Disabling Packet data will work fine. You can also put it in Airplane mode then just enable the radios you need.
Click to expand...
Click to collapse
Sure, disabling packet data works, but it's still not disabling the radio or tower hunting. I'll have to try the airplane mode thing, usually you can't have airplane mode ON and turn on other radios on without it pulling it out of airplane mode.

On my LTE version, On the Quick Settings bar there is a Mobile Data button you can select to toggle the mobile data on and off. It is independent of the Wifi.
Also, a nice touch, when you're not connected to WiFi and you go to access a data application such as the browser, it pops up a reminder along with the list of any in range wifi hot spots. You can disable this reminder, but it's a nice to have.

MileHighAko said:
On my LTE version, On the Quick Settings bar there is a Mobile Data button you can select to toggle the mobile data on and off. It is independent of the Wifi.
Also, a nice touch, when you're not connected to WiFi and you go to access a data application such as the browser, it pops up a reminder along with the list of any in range wifi hot spots. You can disable this reminder, but it's a nice to have.
Click to expand...
Click to collapse
Do you still see signal bars even when "mobile data" is turned off?

Diversion said:
Do you still see signal bars even when "mobile data" is turned off?
Click to expand...
Click to collapse
Wifi signal bars, yes. The same signal bars are used for wifi and 4G/3G. When you're in 4G or 3G it has a secondary indicator next to the signal bar.

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?
Click to expand...
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:

[Q] About 3g and 2g management

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
Sent from my Nexus 4 using xda app-developers app

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.
Sent from my Nexus 4 using xda app-developers app
---------- 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.
Sent from my Nexus 4 using xda app-developers app

Demonic240 said:
2g saves battery when you're connected to Wi-Fi.
Sent from my Nexus 4 using xda app-developers app
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
Sent from my Nexus 4 using xda app-developers app