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2G bands
GSM 850 / 900 / 1800 / 1900 - all models
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3G bands
HSDPA 850 / 900 / 1700 / 1900 / 2100 - SGP541, SGP521, SGP551
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4G bands
1, 2, 3, 4, 5, 7, 8, 13, 17, 20 - SGP521
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Speed
HSPA 42.2/5.76 Mbps, LTE Cat3 100/50 Mbps
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Technology
GSM / HSPA / LTE
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1, 2, 3, 4, 5, 7, 8 - SGP551