SonyEricsson

Most of the Sony Ericsson models released over the past 3-4 years have a menu similar to the one described below. The wording might differ slightly, but you should be able to follow this guide.

SonyEricsson K550i example: 

1 Pres Menu button 2 Select Settings 3 Choose Connectivity, then scroll down to Internet Settings and press Select
     


4 Select Internet Profiles 5 Choose New Profile 6 Press Add
     


7 Type in "MCP INTERNET" and press OK (insignificant: small/capital letters) 8 Name: Mcp Internet will be marked on the display 9 Scroll down to Connect using a new data account and press Select
     


10 Go to New Account and press ADD 11 Choose PS data and press Select 12 Type in "MCP" and press Continue (insignificant: small/capital letters)
     


13 Go to APN and press Edit 14 Type in "internet" (insignificant: small/capital letters) 15 Press Save
     


16 New packet switched data account created will be displayed, press OK 17 Press Save 18 Select the internet profile called Mcp Internet
     

19 Select Internet Profiles if you want to check that Mcp Internet is selected. MCP internet should be marked



20 Then you are done!
Press Return  button or Exit  button to return to start screen