If you're on Orange pay as you go, you can dip into an extra £2.50 of credit if you forget to top-up. It's called Reserve Tank, and to set it up you simply text TANK to 2002. Then, if you try to make a call with little or no credit left, you'll be transferred to an automatic service that lets you choose to activate Reserve Tank before reconnecting you to your original call.
Over 18s only. Customers will receive £2.50 credit to use for calling, texting or browsing, which will be charged at a 20% premium. A one-off set-up fee of £1 applies. Other terms apply. Click here for more details.