@Beauty85 If you go to settings/general/about and scroll down to Network Provider Lock. Does it say “no network restrictions ? If it doesn’t then the device isn’t network unlock to use on any network and you need to contact the network provider that device came from to request it to be unlocked. this device wasn’t from EE or it’ll work with your EE sim.
Thats why you’ve got the message saying “ Sim not supported” It’s not supported as the device is still locked to a network that’s not EE.
