Hello Trevor 476,
I would have said yiy was correct in the statment about being backwards compatable. but after a lot of experimenting I have found that I do indeed need a 12mm wide contact area.
I have loads of used sims gathered over time, and found that only the 12mm size will give some response.
As for being a collectors piece I tend to agree with you, however it is my built in car phone. Which has a more powerful transmitter than hand helds.
So thats my problem. I currently use a vodafone (spit) sim, but would like to use an o2 (aka giffgaff) if possible.
If someone has an old full size giffgaff sim that has the gold contacts being 12mm wide then I wouldnt mind buying it (hopefully at a low cost!!) - Oh - and it works.
Any advice except buy a newer car would be appreciated.