topHow do I activate WorldClass service?
WorldClass activation is simple and free. You can activate WorldClass International Service by calling 611 toll-free from your T-Mobile phone, or calling 1-800-937-8997 from any phone. If you are already outside the US, call Customer Care at +1-505-998-3793. Be aware that it may not be possible to add WorldClass to your account while you are outside the US.
WorldClass activation is simple and free. You can visit the WorldClass activation page on T-Mobile.com, activate through My T-Mobile, or call Customer Care and ask for the WorldClass international feature. If you are already outside the US, call Customer Care at +1-505-998-3793. Be aware that it may not be possible to add WorldClass to your account while you are outside the US.