There are some cheaper tariffs available through comparison sites like USwitch but all will come with a data allownce. The cheapest I can find is £6.99
Depending on your phone usage you may be better finding a different network. There is a deal out there for unlimited Calls and text at £36 per year. Works out at £3 per month
This is not O2 and we are all customers here similar to yourself and cannot answer account type queries.
