Thanks again Beards. I think initially I would try PAYG 'as and when' type. Once I have used that up, it will give me an idea of how much I am actually using the Cellular side and if a regular monthly contract then looked more realistic, I could start that. It seems more logical than jumping straight into a monthly contract.
Since I retired at 70 a couple of years ago and increased my photographic activity, my use of mobile phone had reduced dramatically, that's why I am on PAYG for that on an HTC (Android) phone. Not sure if I would be better off switching the phone to an Apple just yet, but that may be a consideration later on. Just getting used to the Apple system and my first i-Pad.
Cheers for now