It must be about 23 years that i have been with Vodafone! I still have the same phone number and my first phone was a Motorola Micro Tak (nothing "micro" about it was it was massive) with a pull up aerial and the sim card was the size of a credit card! I do look every couple of years when i am about to end my contract but usually end up getting a decent deal with vodafone. Currently getting unlimited/unlimeted/40Gb for £20.
I remember that phone! My mum had one! And I always remember that credit card sized SIM cards!
I believe after that phone she moved on to a Motorola Startac which had the same sort of pull up aerial and credit card sized SIM card but this time the device folded in half... was still the size of a small child though.