For the O2 Online Pay As You Go Talkalot Tarrif, it gives the following entitlement for text and MMS...

"300 text/0 media messages* "

but the asterisk refers to a note below that which reads

"* Please note you can use your free messages to send text or media messages if you have selected an MMS handset."

So, does that mean I got 300 Text or MMS a month?!?

Im on contract at the moment but it is still the same, i get 500 free text a month or 125 MMS ,i was told by o2 that for every 1 MMS it will use 4 normal text messages, so for your 3oo text u can have either 75 MMS OR the 300 text ,or u can mix them and have somthing like 25 MMS and 200 text messages.Hope this helps!!