on 18-09-2011 17:12
i have been on unlimited data on o2 since sept 2008 and yes o2 want to change my tariff but they have no chance unless i mistakenly press upgrade to the new crappy tariffs i'll stick to the 4:1 ratio for texts mms roaming thanks i know i can comfortably go upto 5 gb a month if i wanted but i generally use only about 1 gb
you could use 5GB in one month easily but you would be flagged for the next few months, and if it happened again, you woul dbe notified.
try it out and let us know how you get on.
if you continued to use 5GB each month, o2 can force you to change tariff, or they have the right to disconnect you from data all together.