Many, many, many years ago I in the early eighties I used to sell secondhand mobiles. Made very little on the phone but big money on the contract commission. Standard contract back then was £50 connection charge, £25 per month line rental and 50p per minute or part minute for calls. Standard contract length was 5 (yes, five) years. No such thing as texting back then. Only two networks - Vodafone and Cellnet. Commission - £600+ It didnt matter in those days if a phone was registered as having bad debt or marked as stolen on one network - the other network would take it on and still pay commission. Quite often you'd get someone run up a massive debt on Vodafone, knock them and we'd reconnect them to Cellnet or vice versa - double bubble! My first phone was a Mobira talkman transportable and I paid £1,575 for it. Second phone a Mobira Cityman 1320 - paid £1,200 for it. I still have both of them along with many others in my collection. I still have my memorable 'Gold' number issued to me by Cellnet in 1985 starting with 0860 - now 07860. We could reprogramme and clone any phone and enjoy free calls at anytime to anywhere in the world.