Certainly if you are connecting through T-Mobile hardware either as a customer or as a customer of a provider who contracted with T-Mobile on your behalf. Even

Certainly if you are connecting through T-Mobile hardware either as a customer or as a customer of a provider who contracted with T-Mobile on your behalf. Even if you weren't connecting through T-Mobile managed hardware, if the T-Mobile customer base found or was provisioned with alternative connection mechanisms then they could have been competing with you for bandwidth. The direct answer is no, network outages don't effect services but if you can't access them the experience is though they were out. Consider a friend you want to call. They may be alive and well (or even besides you) but if your phone can't reach theirs you still can't talk to them on your phones.