Wireless Network Compatibility
AT&T and T-Mobile
The iPhone for AT&T and T-Mobile does not support CDMA and will not work on
Sprint or Verizon Wireless. It will use 3G cellular technology for voice
services and either 3G or 4G LTE cellular technology for data services.
However, the iPhone for AT&T and T-Mobile can roam internationally on many
GSM carriers around the world.
Sprint and Verizon Wireless
If Sprint or Verizon Wireless is your wireless carrier, your iPhone will
work on AT&T and T-Mobile once unlocked. An iPhone activated on Sprint or
Verizon Wireless also has the ability to roam internationally on GSM
networks.
International Roaming
All iPhone models are world phones, so you can use them almost anywhere.
Which means you can roam internationally on GSM networks in over 200
countries around the world, whether you are a GSM or CDMA network customer.
Availability of LTE data varies in some countries and depends on carrier
support for certain LTE radio frequencies. For details on LTE network
support, please see www.apple.com/iphone/LTE.
