Having recently upgraded my handset to a smartphone. I was looking to upgrade to Simplicity 20 from Simplicity 15 to get the unlimited internet bolt on.
However the issue was, I would have to sacrifice my Unlimited O2 to O2 bolt on.. but when I rang CS, they were very accommodating.. I did upgrade to Simplicity 20 (i.e. 600mins, 1200text, unlimited web bolt on) but they were kind enough offer me the unlimited O2 to O2 bolt on and the the unlimited text bolt on in addition for free. I am very happy with that.
I hope someone else can benefit from the deal.
PS. Both tariffs are the monthly rolling tariffs and the 700mins, 1400text + free bolt on promotion has ended.. before people start to correct me.. :P