List of countries supported by 8GB and 20GB SIM Cards. List of countries supported by 10GB SIM Cards. Kindly note that the maximum data you can use is 10GB. So if you have used 5GB in the Zone 2, you can than only use remaining 5GB in Zone 1 countries and if you have already used 9GB in zone one countries, than you will only be able to use upto 1 GB in Zone 2 countries.
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