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Thu, Sep 28, 2017 10:57 PM
Is an AT&T SIM card compatible with GSM 900/1800 MHz?
ACE - Sage
3 years ago
ATT does not have a 2G network anymore. These are the network bands
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ACE - Expert
GSM 900/1800 are European frequencies and have not been used by US carriers. If you're wondering whether your AT&T SIM card can be used for roaming on GSM networks in Europe, then as far as I know nothing has changed and you should still be able to do it although in most places you will be seeing LTE/3G signal these days.
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