Sony Ericsson

Press Menu (Navi key)
Highlight Settings and Select (press Navi key)
Highlight Connectivity and Select (press Navi key)
Highlight Internet settings and Select (press Navi key)
Highlight Connect using: and Select (press Navi key)
Press Options (left soft key), highlight Create New and Select (press Navi key)
Highlight PS data and Select (press Navi key)
Highlight Name and Edit (press Navi key), enter lycamobile and then OK (press Navi key)
Highlight APN and Edit (press Navi key), enter data.lycamobile.tn and then OK (press Navi key)
Press Save (left soft key)
Highlight lycamobile and press Options (left soft key)
Highlight Edit and then Select (press Navi key)
Skip past APN as you've already entered this
Highlight Username and then Edit (press Navi key), enter lmfr and Save (press Navi key)
Highlight Password and then Edit (press Navi key), enter password: plus and Save (press Navi key)
Check that Login request is set at Off
Check that IP address is set at blank
Check that DNS address is set at blank
Highlight Authentication and then Edit (press Navi key), check that only PAP is marked (remove the tick by highlight the option and then press the Navi key to Unmark), then Save (left soft key)
Check that Data compression is set at Off
Check that Header compr. is set at Off
Highlight Proxy settings and then Edit (press Navi key)
Highlight Proxy and then Edit (press Navi key), highlight Off and Select (press Navi key)
Tap Back (right soft key) four times