I look after a small fleet of iPhone 5's at work. When we got the 5's for staff not long after release we got them Nano Sim's at the same time so almost 2 years ago. I got my Spark account manager to send out a bunch of 4G SIMs to ready us for moving to iPhone 6. I am seeing a lot of the iPhones I'm upgrading SIM cards on already show 4G even though they are using an older SIM card. Is it fair to say I'm wasting my time doing SIM upgrades if the phone already shows 4G in the title bar.

Thanks