People calling you on your Global SIM will be charged for a call to the UK. It will vary on the carrier and agreements the person has with their provider.
If you are experiencing difficulty making calls this may be one of 2 factors.
You may not be dialing correctly or you may be on an unsupported network.
Step 1. You should first check that you are dialing correctly.
To call from your Global SIM, you need to call in the full international format. This means you need to call with a + then country code then the number.
If you find that you are dialling correctly but still cannot make a call, try replacing the + with a * and adding a # at the end.
If you are calling a New Zealand Mobile 021xxxxxx , you will be dialing on your Global SIM, +64 21 xxx xxx or *64 21 xxx xxx#
Step 2. Try manually selecting a different carrier:
You can find our supported networks by clicking here and enter the country you are in and the country you are calling to.
On an iPhone:
Step 1. Go to Settings on your iPhone
Step 2. Scroll down to find Carrier/mobile
Step 3. Switch 'Automatic' OFF
Step 4. After searching please select a supported network
On an Android:
Step 1. Go to Settings on your device
Step 2. Find Wireless and Networks
Step 3. Then click on Mobile Networks or Network Operators
Step 4. Your device will now search for networks around you
Step 5. Select one of our supported networks
Using all other mobiles:
Step 1. On the main Menu of your device, find Settings
Step 2. Look for the option Mobile Network or Connectivity
Step 3. Scroll down until you can find the option called Operators or Network Selection
Step 4. Select Manual search
Step 5. Once search is complete, simply select one of our supported networks on the list to be connected.
For example to call the New Zealand number 021 xxx xxx you would then dial *64 21 xxx xxx#