iphone 4 - data card only but no data only can msg
Hi
I have an iphone 4 which has an Optus datacard that is connected to my main phone (data sharing) my son can msg but cannot Access data. We have similar setup with iphone 5 and no issues. Optus advises that the card/plan is setup correctly have tried many things from resets to power off. Any ideas?
iPhone 4, iOS 7.1.2