Wi fii stays connected but email and username set up only stay on few minutes and then shows connection problem and cannot access any thing

R u in a strong connection place?

To connect to the Kindle Store your device must have either a wi-fi connection to the Internet or a 3G Whispersynch connection via a telecom. Some Kindles come with the 3G and some don't. The ones that don't require a Wi-Fi connection.

So, if you have Wi-Fi access the turn off Airplane mode in Settings and enter the Wi-Fi password to your router. If you are using public Wi-Fi such as at McDonalds you might have to
use the experimental browser in setting to be able to click the *accept terms* button or you will not have access even if connected.

Go to setting turn on Wifi and search in a few minutes it should show available networks connect to your network and if protected enter password from router or modem. Will will tell you if it is connected or trying.

How many 'bars' are showing on wi-fi signal strength indicator (presuming you are using wi-fi for internet access)? If the signal strength is low, you could be losing connections that way, or there might be interference on the wi-fi channel that the tablet is using. Try changing channels in your wi-fi setup and see if there is an improvement in the behavior.

Hi
To connect to a WiFi system, you may need 3 pieces of information:
A username
A password
An encryption key
Once you have successfully linked to a WiFi access point then your tablet will remember the settings until told to forget them.
A lot of the time you may only need the encryption key, and if the tablet detects a WiFi access point then if you tap on that in wireless settings then it will either connect automatically or ask you for some sort of code - the encryption key. If this is not entered correctly then it will return an authentication problem/error. In order to connect you have to have this code. Also bear n mind that the code may or may not be case sensitive, and that the authentication type for both router and tablet needs to be the same. It is possible that you will only be able to change the authentication type on the Aceess Point / router and not on the tablet.
Cheers

It's a good idea to access Wi-Fi whenever possible to avoid data charges. After you've activated the Android tablet's Wi-Fi radio, you can connect to an available wireless network. Obey these steps:

1. Open the Settings app.
2. Choose Wi-Fi.On some Samsung tablets, you find the Wi-Fi item on the Connections tab. Choose Wi-Fi to view a list of available Wi-Fi networks on the right side of the screen. Otherwise, the list shows up full screen.
   
3. Choose a wireless network from the list.When no wireless networks are listed, you're sort of out of luck regarding Wi-Fi access from your current location.
4. If prompted, type the network password.
   Touch the Show Password check box so that you can see what you're typing; some of those network passwords can be long.
5. Touch the Connect button.
   The network is connected immediately. If not, try the password again.

When the tablet is connected to a wireless network, you see the Wi-Fi Connected status icon. This icon indicates that the tablet's Wi-Fi is on, connected, and communicating with a Wi-Fi network.
Some wireless networks don't broadcast their names, which adds security but also makes connecting more difficult. In those cases, touch the Add icon. This icon might also be labeled Add Wi-Fi or Manually Connect. To make the connection, type the network name, or SSID, and choose the type of security.
You also need the password, if one is used. You can obtain this information from the girl with the pink hair who sold you coffee or from whoever is in charge of the wireless network at your location.

• Not every wireless network has a password. Still:
• Be careful when connecting to a non-password-protected network. It's possible that the Bad Guys can monitor such a network, stealing passwords and other information.
• Some public networks are open to anyone, but you have to use the web browser app to find a login web page that lets you access the network: Simply browse to any page on the Internet, and the login web page shows up.
• The Android tablet automatically remembers every Wi-Fi network it has ever been connected to and automatically reconnects upon finding the same network again.
• To disconnect from a Wi-Fi network, simply turn off Wi-Fi.
• Use Wi-Fi whenever you plan to remain in one location for a while. Unlike a mobile data network, a Wi-Fi network's broadcast signal has a limited range. If you wander too far away, your tablet loses the signal and is disconnected.

Pinterest connect to 3G while Facebook probably needs Wi-Fi you'll need to turn your Wi-Fi on an connect with password and username

no es un problema en el wii fii es un virus que fue descargado en alguna app prueba conun antivirus de la android store

Problem could be with your wi fi transmitter or the receiver in your device. Use another known working device and see what happens so you can localize the source of the anomaly.

You are mixing up two things: 3G and Wi-Fi.

3G is a mobile phone data service, supported by selected Kindle devices. Your Kindle 3 3G has a SIM card built inside, just like the fingernail-size chips you put into a mobile phone. Amazon set up contracts with phone service providers in many countries so you can use it to download books to your Kindle at no extra costs for you other than the higher price of Kindle 3 3G compared to the non-3G version. You do not need any extra hardware for this to work, and it will work in most places of the world. This is the guarantee you were promised.

Wi-Fi is a wireless communication standard all Kindle devices support. While most hotels, airports and some restaurants provide free Wi-Fi access for guests, you need your own WLAN router at your home, and pay for your own broadband internet service. The "all sorts of wireless connections which are all password protected" belong to your neighbors and they are password protected so that nobody can take a free ride on the service they pay for.

You can tell the connection status of your Kindle from symbols in in the status bar, at the top right of the screen:

• If it shows "OFF", wireless connectivity is deactivated and you cannot access the internet from your Kindle, or download books.
• If it shows "Wi-Fi", the Kindle is connected to a Wi-Fi network. The five bars right of the symbol represent the connection's signal strength, the more bars are black, the better.
• If it shows "3G", you are connected via 3G mobile data service. The bars right of this symbol refer to mobile phone service signal strength, much like a mobile phone would show you.
  

If you do not have internet connection with wireless LAN at home, you need to set up your Kindle to use the 3G service. This is the default setting when the device is delivered to you, and I believe it worked until you or somebody else inadvertently changed the configuration.
Follow this step-by-step procedure:

1. Switch on your Kindle.
2. Press the "Home" button.
3. Check the status bar. Does it show the "3G" symbol? If yes, how about signal strength? If you are somehow blocked from mobile phone antennas in your area, signal strength will be low and the Kindle will not have internet access. Move around and see if it becomes better.
4. Does it show the "OFF" symbol? If yes, press the "Menu" button. A menu of commands should open. Use the four-way button just below "Menu" to underline the top-most option "Turn Wireless On" and press the center of the four-way. The menu list will close, and after a moment Kindle will try to connect to the internet.
5. Does it show the "Wi-Fi" symbol? If yes, I assume you accidentally connected to a neighbor's Wi-Fi network and its firewall protected, or is too far away to use it. In this case, press the "Menu" button to open the command menu. Use the four-way button just below "Menu" to underline "Settings", second option from the bottom, and press the center of of the four-way. The settings menu will open. Use the four-way button to navigate down to "Wi-Fi Settings" (the text "view" must be underlined) and press the center of the four-way. The list of Wi-Fi networks open. Navigate down using the four-way to any network with the text "forget" on it and press the center of the four-way.

Please let me know if you encounter problems in following these instructions, and I'll try to assist you further.