701 offline no internet connection

Question

When offline wifi opens but internet connection not. In online mode the internet opens in 3g phone connection and in Wifi connection.
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Answer 1

Are any other apps able to connect to the internet through Wifi? If other apps can connect without problems, then, in Web browser, go to Options--> Settings-->General--> Access point-->Internet-->Options-->choose Select. Under this last "Options", do not choose "Select access point".
Otherwise, if you can connect to your wifi network, but no apps can reach the internet, do this:
While you are connected to wifi, pull down top menu from home screen. Under Activities, touch where it says Wi-Fi and the name of your network. Then, touch the lower right corner (the 3 bars), Choose Settings. Make sure that Power Saving is enabled, but that Advanced power saving is disabled. If this still does not solve the problem, then disable power saving altogether.
If STILL no luck, then go back to the list of wifi connections, and remove the name of the wifi access point you're trying to connect to. Allow the phone to find it again anew. BTW, can the 701 connect to other wifi networks without problems? If so, then perhaps it's a peculiar mismatch between the wireless router and your phone. See if you can reset the router, or have it switch channels.
If none of the above work, then you might have to consider restoring default phone settings, or even reinstalling system software. Lastly, hardware repair, but good luck with that one at this point.