Samsung Galaxy S2 not Connecting to Kies

Last week I spent few hours to figure out why Samsung Galaxy S2 was not connecting to Samsung Kies through USB cable. I could browse phone contents using Windows Explorer, transfer files, music and photos, even I could use Kies Air but Kies on my computer kept on ignoring the phone. It always displayed connecting but never got connected.

To resolve the connection problem several times I used the connection troubleshooter which comes with Kies, reinstalled Kies, updated Kies, restarted phone and computer but had no success. Then suddenly I figured this was happening because the phone is in wrong connection mode. By some application or setting the USB connection mode was set to Camera (PTP). Because of this Kies could not connect with the phone. To correct the connection problem simply I had to change the connection mode to Media Device (MTP).

This can be done by accessing the notification area.

Select Media device (MTP) to correctly connect to Kies.

How Networks Work

I found a really good video which explains how data is travelled in the network. This explains in simple words with animation about the tasks done by the following main components and more.

• Packet
• Router
• Switch
• Firewall

If anyone is interested in networking I highly recommend you to watch this.

Setting APN

APN or Access Point Name is a setting which needs to be set on the mobile when we need to get connected to internet using the phone.

APN changes from one mobile service provider to the other. For example Dialog will have http://www.dialogsl.com/ Rogers will have internet.com set as their APN.

But letting users set the APN manually is always not the preferred way. Recently we developed an application for BlackBerry which the user needed to get to the internet without he manually setting the APN. The application was supposed to be delivered through BlackBerry App World so manually setting APN was not an option. In a case like this what you have to do is set the APN programmatically into the connection.

String URL = “www.SomeServer.com”;
StringBuffer bfURL;
bfURL = new StringBuffer ();
bfURL.append (URL);
bfURL.append (";deviceside=true ;apn=internet.com");
bfURL.append (";tunnelauthusername=UserName;tunnelauthpassword=Password");
String FinalURL = bfURL.toString ();

In the above code I have set the Rogers APN in to this connection.

If you need more details on the parameters used or need to know about the other parameters you are eligible to use such as WapGatewayIP, WapGatewayPort, WapGatewayAPN, etc visit the following link to view full details of the connector class.

http://www.blackberry.com/developers/docs/4.2api/javax/microedition/io/Connector.html