The `BulkGate\Sms\Country` class is a static class that contains constants with [ISO 3166-1 alpha-2](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2) codes.

```php
use BulkGate\Sms\Country;      // PHP SDK 1.0
use BulkGate\Sdk\Country;      // PHP SDK 2.0
```

Both generations have their own class with the same constants — only the
namespace differs.

Use:

```php
echo Country::CZECH_REPUBLIC; // 'CZ'

echo Country::UNITED_KINGDOM; // 'GB'

echo Country::UNITED_STATES; // 'US'

echo Country::FRANCE; // 'FR'

echo Country::AUSTRALIA; // 'AU'

// ... etc

```