If you buy a new mobile phone, can you use another networks sim card with no problems?
SIM free is where you buy just the handset, but it doesn’t come with a SIM card. Normally the cost of the handset will be substantially higher if you do this. You may also be able to purchase the handset and get it unlocked at your local independent phone shop or market stall for between £5 and £10. As phone are generally subsidised quite heavily in the UK the operators lock them so only their SIM cards work in them. Hope this helps, if you have any further questions don’t hesitate to give me a shout.