Sony Ericsson

Go to Menu > Settings > Connectivity > Datacommunication > Dataaccount > New account
Select Add
Set account type to PS-data
Click Select
Enter a name for the account: Lycamobile
Click Continue
Enter the access point name under APN: data.lycamobile.tn
Username: lmfr and Password: plus
Save
Back * 3
Select Internet settings > Internet profiles
New profile > Add
Connect with > choose the above created account
Save
Back * 3
Select Settings for Java
Choose account you have just created.