People calling you on your Sleek World 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 Sleek World SIM, you need to call in the full international format. This means you
need to call with a + then country code then the
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.
Step 2. Try manually selecting a different carrier:
To call you directly from a mobile:
Example: from any mobile phone dial: + 44 ### ### ####
Note: the + sign is recognised by all networks in the world as the universal exit code for mobiles instead of dialling a exit code.
Hint: Generally you will find the '+' sign on either the '0' button, or one of the buttons either side of the '0' button, by holding the 0 down it will convert to a + or press the respective button on your phone.
To call you directly from a landline:
Example: from an Nigerian landline dial: 011 44 ### ### ####
Hint: International Exit Codes or International Direct Dialling Codes (IDD) are required to dial internationally out of a country.