Hey fellas, been a while since I posted on this site. So I'm going to get an Xperia Z1 COMPACT and I know this is the wrong forum but I figured it'd be the same. Right now I have a Sony Ericsson Xperia Play, which is something like 4/5 years old now and I'm going to upgrade. However I'm on GiffGaff and want to stay on GiffGaff for the time being. So my question is the title, does the Z1/Z1 Compact use the bigger, conventional Sim cards or do they use the smaller or built in one. Please don't say I'm doomed to go with 02, EE or another major network to get this phone because GiffGaff have been really good to me.