Originally Posted by RealityRocks:
“You need a minimum of 60p calling credit to get on wap regardless if you have a free data allowance. o2 PAYG comes with 1mb/month free. Changing the port will not affect the billing it's a simple switch between connecting over http or wap - ie, you can't get free wap.”
Most O2 sims come with a Free data allowance. This ranges from 128kB to 5mb dependent on tariff. I believe the O2 online PAG sim's have a 5mb joining "bonus", if you pay a regular amount by Direct debit you get 1mb free per month. Like I said its all tariff dependent and they are always "tweaking" them so this info may not be 100% accurate.
You don't need a minimum "money" balance if you have free data on the sim.
It doesn't matter what port you use, you will be billed.