here is Full detail :
Apple live Chat:Yes, when you travel internationally, you can use a local GSM nano sim card for a local carrier.
Apple live Chat:Yes, the Tmobile model would need to be activated at the local Apple Store, Tmobiel store or by calling Tmobile
Apple live Chat:The Tmobile iPhone 5s would need to be activated with the Tmobile sim. You would then be able to use it internationally with another GSM compatible sim.
Apple live Chat:To use an iPhone unlocked with other US carriers, you would need the sim free unlocked model.
Apple live Chat:recommend checking with your local Apple Store for the availability of the unlocked sim free model.
Me:aha and the T-mobile isn't simfree
Apple live Chat:Correct, that model comes with the Tmobile sim preinstalled
Me:but it's work with international carries as well
Apple live Chat:Yes, that is correct.
Apple live Chat:Yes, when you travel internationally, you can use a local GSM nano sim card for a local carrier.
Apple live Chat:Yes, the Tmobile model would need to be activated at the local Apple Store, Tmobiel store or by calling Tmobile
Apple live Chat:The Tmobile iPhone 5s would need to be activated with the Tmobile sim. You would then be able to use it internationally with another GSM compatible sim.
Apple live Chat:To use an iPhone unlocked with other US carriers, you would need the sim free unlocked model.
Apple live Chat:recommend checking with your local Apple Store for the availability of the unlocked sim free model.
Me:aha and the T-mobile isn't simfree
Apple live Chat:Correct, that model comes with the Tmobile sim preinstalled
Me:but it's work with international carries as well
Apple live Chat:Yes, that is correct.