I currently have a PAYG. I want to move to pay monthly with a new tariff - sim only - can I keep the sim that I have and just switch to pay monthly - and if so , how do I do this?
Our sim is used in a gate intercom, so I don't want to change it and have to re-programme it (usually with the help of a gate technician at a cost). Can I keep my current sim where it is ?