I recently lost internet access on my Samsung Galaxy S2 when I upgraded to version 4.0.4, which I believe is Ice Cream Sandwich.
I've tried all the internet settings posted on the forum multiple times, so it can't be because I'm not typing them in correctly.
Open Settings then click MORE SETTINGS
Then click MOBILE NETWORKS
Next click ACCESS POINT NAMES
From here press you menu key which is the touch button to the left of the home button
Next select + NEW APN from here enter this information
Name - giffgaff
APN - giffgaff.com
Proxy - 188.8.131.52
Port - 8080
Username - giffgaff
Password - password
MMS proxy - 184.108.40.206
MMS port - 8080
MCC - 234
MNC - 10
Authentication type - PAP
APN type - default,supl,mms
Enable/disable APN - tick box (APN enabled)
Bearer - unspecified
After this press you menu button again and select save.
This will take you back to the select APN screen, from here select your newly created giffgaff APN by clicking the small circle next to the giffgaff APN this will make the circle go green
next press your back button and ensure you USE PACKET DATA box is ticked
Then go back to the main settings page and Set Wi-Fi to OFF Return to home screen. Reboot your phone (turn off and on again).
Your internet should be up and running
Please, please help!! I don't know what else to try,
Thank you & blessings,