My iphone is definitely unlocked, yet it is not working with my 48 sim card as it is not recognized as likes of 02, 3 and vodafone. It keeps saying my sim card isn't supported under the activation policy....and so on. I've tried to look for solutions online but, when I tried to sync it to my itunes it wouldn't even allow me because the phone doesn't support the sim card and it prevented itunes from reading my phone. I've tried turning it off and all but still nothing. 

I don't want to have to move network to a bigger company 😞