Unlock a FirstNet mobile device.
A Step-by-Step Guide to Unlocking Your FirstNet Mobile Device. FirstNet mobile phones, tablets, or modems are locked by default and can only work on the FirstNet/AT&T network, so unlocking is necessary. For example, once your device has been unlocked, you can use any SIM card or eSIM from the US, including Verizon, T-Mobile, Cricket, or […]
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