This must be done using the relevant iPhone
STEP BY STEP GUIDE
When using an iPhone outside of Europe and the UK some additional settings need to be completed to enable the GK Travel SIM.
STEP 1
Click on the DOWNLOAD IPHONE APN SETTINGS ABOVE
STEP 2
Click ALLOW when prompted to download the configuration profile
STEP 3
Select IPHONE when asked to choose a device to install the profile
STEP 4
Once the profile is installed click CLOSE.
Then go to SETTINGS > GENERAL > PROFILES and install the APN profile
STEP 5
Under PROFILE select APN SETTINGS
STEP 6
Select INSTALL
STEP 7
Select INSTALL
STEP 8
Select DONE
(make sure Cellular Data & Data Roaming are turned on)
STEP 9
Once you stop using the GK Travel SIM you will need to remove the profile.
Go to SETTINGS > GENERAL > PROFILES
STEP 10
Select REMOVE PROFILE