ok found this . no idea if it works .. please anyone trying it let us know if it works..
Step 1: You Need a brand new o2 sim card for your mobile
Step 2: Wait for the text message saying "Welcome to o2......"
Step 3: Text BALANCE to 50202 ( FREE )
Step 4: You will get an alert saying "£0.00"
Step 5: You will recieve a text message saying"you now have 300 Texts and 1.0mb of o2 Active until this date( What ever date you done this scam ) and will expire next month
Step 6: Enjoy your free 300 texts and 1.0 MB of internet for the month