since I got my jasjar I I saw,sometimes, the battery was drained at 50% without using my jasjar in 3 or 4 hours. only one or two short phone calls. no msn running or any application. I have written a little C program that writes to a log file each 10 seconds the actual time(hour, minute and second) . ok, if there isn't 3g connection (of course, no programs running), and I turned off the device and when I turn on the device 5 minutes later I could see the CPU hasn't been running, so minimal battery drain. But if I do the same test but connected to UMTS (again no programs running, only the test program) I could see that my test program many times continues working many minutes, so cpu is working (i turned off the device), then it stops few seconfs, again It continues working....(the screen was turned off). so......be carefull if you turn off your jasjar with the umts connection active. while you think that your device is turned off and you are saving battery......its possible the cpu is running eating the battery.
and how do you disable UMTS and just leave GPRS on????
mmm, i simply disconnect the umts connection if i am going to turn off the device....
I have seen that my JASJAR is sporadically sending/receiving data in the background even if the applications are apparently inactive. This is causing the radio connection to stay up for a long time. Especially on Vodafone Spain UMTS network radio connections are kept for ~20seconds after the user data is sent.
The only application I had running was ActiveSync, with an update period of 5 minutes. However, within the 5 minutes I can see activity in the channel every 40 seconds approximately, even when ActiveSync has finished synching.
Anyone knows of any good packet sniffer for WM5.0 to identify exactly what that traffic is for?
As a consequence of what I think is background ActiveSync traffic, radio transmission is performed for a considerable amount of time (radio channel is active 33% of the time in my case), which drains battery extremely quickly.
This is related to this specific network implementation (all data sent on CELL_DCH mode, for those who understand UMTS RRM, though this is very likely to change in the near future), while other operators are using CELL_FACH, more similar to GPRS behaviour and more efficient in terms of battery usage. What network operator are you using?
If you want to avoid the UMTS network in order to maximise battery you can force the phone into GPRS only mode in Settings-->Phone-->Band and changing from Automatic to GSM... at the cost of not having video-calls, simultaneous voice+data or high download speeds.
Thank you y gracias !!!
If you want to avoid the UMTS network in order to maximise battery you can force the phone into GPRS only mode in Settings-->Phone-->Band and changing from Automatic to GSM... at the cost of not having video-calls, simultaneous voice+data or high download speeds.
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I have done this and ive noticed i have alot better signal strength now,
really, before i could never get over 1 bar and often saw it was scanning to try and find a network, now im nearlly allways all bars,
I dont use UMTS so im well happy with this setup
Hey there,
Since a few days I've had this problem that my xperia connects itself to the 3g/hsdpa network for no reason.
At first I thought who cares but then I thought about my battery.. in other words, does having your xperia phone being connected to a 3g/hsdpa network lower your battery time?
And if it does, is there anyway I can make it so it doesn't connect by itself but only when I start up opera or any other application that might use the connection?
Hello everyone
I'm noticing that too often when connected wirelessly to the x10 (line fastweb home) connection takes a few minutes or a few seconds and then falls wrapped the line ... Is there a way to solve this problem? Or there is a program that allows me to use the wi-fi on your laptop?thanks
Hello Everyone,
I have the following problem with my Xperia 10. Whenever I am in location where the 3G signal is not strong enough my phone changes to GPRS network (Normal). When I'm in location where 3G signal is strong my phone would take a while to change to the UMTS (3G) network. When it does, the phone does not automatically connects to the internet. When I start my browser it says that I don't have a internet connection.
I contacted Sony Ericsson helpdesk and they said it is well known bug in the android phones and the only way to connect back to the internet is by shutting off all wireless connections and putting back on. I find this to be "neat" work around but I find it annoying that I have to do this all the time. I'm not convinced that this is bug because I have some friends who have the HTC hero and desire and they have never heard about this before.
Can somebody tell me if this is actually a bug in the Android phones or is it just the X10?
Just popped open my S4 yesterday, and it has been fantastic. I've just been wondering if anyone else has been experiencing a problem with the smart wifi feature. Whenever you leave it on, if a Wifi Signal is a dynamic IP it seems to drop it if you move around within the area and is unable to connect with other routers hosting the same connection, however, when it switches to the data, either 3g or 4g, I am unable to resume data connections over the network, even after waiting a few minutes, and sometimes have had to restart it. Any others having this problem? Or am I just impatient.