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Questions tagged [3g]

For questions about 3G mobile networking and communications standards and their implementations.

535 questions
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How to judge a USIM card in a mobile data module(WCDMA) is out of balance?

I used a 3G(WCDMA) mobile data modern, which dail up in embedded linux, sometimes I find the USIM card is out of balance, so it can't dialup normal, I just search the modern manual to find the AT command can be help. I use command called "SYSINFO",…
xtank
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Force android to use 3G while Wifi is enabled or wait for response from Gmail

I made an app wich will run onto a local Wifi (not internet connection) and it need to send mail via Gmail or maybe the Email app. So I would like to force it through 3G connection. I've done this : if (imageLoaded) { ConnectivityManager cm = …
Purfakt
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For my task how should you communicate between iphone devices over the 3G network?

I have a situation where I would like to communicate between 2-4 devices over the 3G network (it should also work over WLAN, but 3G solution is critical). Every device (except one) asks for a GPS-location every ~5 seconds, but when this process is…
hirre
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Could I connect to my iphone using 3g ip?

This question is for pure curiosity. Lets say I have lighttpd installed on my phone (or any service for that matter). Pinging the ip from my pc results in timed out connection and its clear the iphones internal firewall is non existent (well I…
Edhen
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android application hangs when it connects to webservice using 3g connection and works fine with WIFI

I am developing an android application that consumes web service , the service output is XML I am connecting to the web service using this code public String converse(String host, int port, String path) throws IOException,…
Muhannad A.Alhariri
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Google Map update with WiFi but not with 3G

I've made an app that determines the location (balloon) and shows it on Google Maps (with roads, city etc) so an active internet is needed. This works fine when I'm using WiFi but not on 3G. It determines the location and the location-output tot…
Qwyrp
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Enable 3G and WiFi Simultaneously

Does anyone know if its possible (programatically) to enable both 3G and WiFi to be used simultaneously, both receiving and sending packets? I have seen various other questions on here, but with the Tethering ability inside Android now, I was…
Mimminito
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App works fine in wifi but doesn't work in 3g

i'm a new Android developer and I'm developing an application that display image from an url adress. It works fine in wifi but doesn't work in 3g. Here's the code : private void downloadImage(String urlPar, boolean imageSuivant) { try { …
loulou8284
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How to access a webserver over 3G network?

I have a public IP and many devices over 3G network. All the devices has a webserver running which provides status and can be controlled. They can see public IP but there is no way I can access webpages form internet. Is there any way I could relay…
emblinux
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Capturing cellular network packets on iOS?

I found an article that discuss capturing network packets traveling over Wifi on iOS: http://www.cardinalpeak.com/blog/?p=519 How can I achieve the same thing for cellular (i.e. 3G, 4G) network packets? I'm trying to figure out what network protocol…
Gili
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Mobile Network Issues

I have written an application using websocket protocol. I want to ensure a persistent connection for my application. I have the phone vibrate when it has successfully connected to my server. Right now, it works whenever I make a connection through…
ElectronAnt
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Android : I/O Exception and could not transition from WiFi to 3G for some specific WiFis

In my Android Application, there are consistent and frequent server request and responses. If I launch the app with WiFi, then exit and relaunch with 3G. The request to Server fails with IO Exception. Observations: This happens only on few WiFi…
Sumanth
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Udp Connection IP problems

I'm making a udp connection between a PC and a mobile (Android device) over 3G to stream video and other things. I tested my code over Wifi connection and it works just fine. The problem is: when connecting over 3G, the connection doesn't work…
Belal Salama
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Mobile network generations and bandwidth

I have couple of question related to mobile network generations: While comparing generation of mobile network people mention that 1G and 2G has to use maximum bandwidth. What is bandwidth in this content and why they use maximum bandwidth? 1G and…
spd
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USB 3G Modem for embedded linux

I am fairly new to linux world, I have to develop an application on embedded linux which sends data over internet. I have to choose a USB 3G modem with a SIM card holder. I would appreciate if anyone can help me choosing a USB 3G modem which works…
emblinux
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