mizan337 EE offers this option to their customers 5 call me text message per month.
To be accurate, the network sends a generic text to your chosen voice call recipient, explaining you are out of credit.
Since giffgaff offer unlimited texts on all their goodybags the demand for such a service would be restricted to paygo users.
julie12910 How long do you imagine a company can survive if no one needed to pay for anything.
giffgaff have been fairly generous since they started. Free 0800 calls, when other mobile networks charged. nhs 111 and police 101 are both free.
They ramped up the free content by allowing free data access to all nhs websites, from your giffgaff sim.