: You may still get LTE data service if you swap a previously activated SIM card into the phone, but you will likely be unable to make or receive standard cellular calls.
: AT&T requires VoLTE (Voice over LTE) for all devices. Because the OnePlus 5 is not on the AT&T Approved List , it often defaults to 3G for calls, which no longer exists on their network. oneplus 5 at&t buy
The (released in 2017) is no longer officially supported on the AT&T network following the 3G "sunset" in early 2022. While the hardware technically supports many of AT&T's 4G LTE bands, the device is not on the official AT&T Whitelist , which is required for making calls over the current network infrastructure. Network Compatibility Status : You may still get LTE data service