Windows Phone should and does always prioritize WiFi over your mobile 3G data connection if WiFi is enabled when you are using your phone.
When the phone is not used and the screen is turned off, WiFi will be turned off as well. Unless the power adapter is connected, then WiFi will not be switched off, and the phone will keep using WiFi.
There are many situations
Plugged out and the screen is unlocked: It will prefer Wifi over 3G.
Plugged out and sleeping (display off): If your phone is sleeping in your pocket and you have 3G and WiFi turned on it will not use Wifi. It because when sleeping the phone automatically turn of Wifi.
Plugged in: The phone will prefer Wifi even when sleeping.
Those symbols indicate which cellular network standard your mobile data connection is currently using, which in turn determines your maximum connection speed.
H stands for HSPA, or High Speed Packet Access, with a maximum theoretical speed of 14 Mb/s, or 42 Mb/s with HSDPA (High Speed Downlink Packet Access).
H+ stands for HSPA+, or Evolved HSPA, with a ...
Microsoft released their own application called DataSense that allows you to monitor your usage. This is carrier-dependent though so you'll have to check that your provider/country have an app for it (you can search the Marketplace for DataSense on your phone).
If neither of those is good for you, then I'm afraid for the forseeable future you're stuck with ...
You can configure a proxy when connected to a Wi-Fi network; first go to Settings; Then to WiFi. Turn WiFi on if it isn't already, and allow it to connect. Tap on the network to bring up the details, you'll see a sliderr for proxy, and you can turn it on, and configure the server, port; and optionally any authentication.
Normally APN settings should be deployed automatically or rather are not required in the most cases while roaming in your home network because they are set/corrected by the provider on the network side.
But as this is only being done by your provider in the home network you are required to have the correct APN set during roaming in a foreign country's ...
Along with the OS preferences, each app can prioritize network connection. In my apps I always check to see if the user is connected to wifi before sending or receiving large amounts of data.
For instance, in one of my apps that handles recorded video, I firmly warn the user that they are not connected to wi-fi. If they are already connected to wi-fi the ...
Try restarting your phone a few times and wait at least 10 seconds before You turn him on again. Delete the internet connection from your phone and wait at least a minute. Then fill in the password of the internet connection and normally it'll work. If it doesn't There will be something wrong with your phone or your access point.
Your best bet will be to get a travel/mini wireless router. They are small and will let you share your ethernet connection (and sometimes other internet connection types) with your phone.
You will need to shop around and find the best one for you. Amazon has quite a good selection.
That depends on how you mean "connected" -- if you have it connected via USB, then no. It is still using mobile data. If you are using software like Virtual Wifi Router and your phone is connected to that SSID then WiFi will trump mobile data and it will go out that way.
This used to be a built-in feature of Windows Phone 7, but as outlined by another ...
No, there is no support for Flash. Flash is an outdated technology that no-one should support. If you find a website using Flash, please ask them to convert it to HTML5 instead.
Regarding RTSP, no, there is not.
You mention in your comment to @LouisGR that you're just trying to block WhatsApp for a while, while also using other apps. That's easy enough.
Disable the app from running in the background. As long as WhatsApp isn't in the foreground, it won't run at all and therefore can't access data. To do this, go to Settings, search for "Background apps", and turn ...
Looks like that version of Messenger is no longer supported on Windows Phone 8.1. Here's an official announcement from Facebook stating that various apps would be discontinued on older operating systems, including WP8 as well as older versions of iOS and Android:
Update on messaging support for older versions of Messenger and Facebook apps
Any Windows phone that supports USB host mode (which will be anything that supports Continuum for sure, and possibly others) will be able to use USB Ethernet adaptors... if the drivers are available. That's a big if. Devices that work "out of the box" using Microsoft-supplied drivers on desktop Windows are the most likely to work on phones.
Unfortunately this cannot be done on Windows Phone 7. If you are using Wi-Fi you could unplug your router+modem for 60 seconds and then try again. Depending on the brand, your router may have additional options to flush the DNS.
I'm not aware of any option to let you specify a static IP address on a Windows Phone client. A more secure option would be to use MAC filtering over the WiFi network, and assign the IPs to trusted MAC addresses (if you really need them to be static)