APN Settings Plan.com iPhone
Open Settings
Open Mobile Data
Check Mobile Data is turned on
If outside of the UK, check Roaming is turned on
Open Mobile Data Network
Setup the Mobile Data and Personal Hotspot settings as follows
APN - data.plan.com
Username - plan
Password -
No password is needed however if you view these settings again, the iPhone will show the password field as *********
Test mobile data using this link
You should see Plan Communications as the ISP if mobile data is setup correctly.