It should work on GSM networks +3G data, not on Verizon/Sprint

 

Network Connectivity & Carrier Support Differences

Each iPhone 5s device, regardless of other network compatibility, supports 802.11n Wi-Fi on both the 2.4 GHz and 5 GHz frequencies in addition to Bluetooth 4.0 and the 850, 900, 1800, and 1900 MHz frequencies of GSM/EDGE.

However, other supported cellular networks are quite different:

iPhone 5s	Model Number	UMTS/HSPA+ DC-HSDPA	CDMA EV-DO	LTE Bands (4G)
GSM/North America	A1533†	850, 900, 1700/2100, 1900, 2100 MHz	None	1, 2, 3, 4, 5, 8, 13, 17, 19, 20, 25
CDMA/Verizon	A1533	850, 900, 1700/2100, 1900, 2100 MHz	800, 1700/2100, 1900, 2100 MHz	1, 2, 3, 4, 5, 8, 13, 17, 19, 20, 25
CDMA/China	A1533	850, 900, 1700/2100, 1900, 2100 MHz	800, 1700/2100, 1900, 2100 MHz	None
CDMA/US/Japan	A1453	850, 900, 1700/2100, 1900, 2100 MHz	800, 1700/2100, 1900, 2100 MHz	1, 2, 3, 4, 5, 8, 13, 17, 18, 19, 20, 25, 26
UK/Europe	A1457	850, 900, 1900, 2100 MHz	None	1, 2, 3, 5, 7, 8, 20
China	A1528	850, 900, 1900, 2100 MHz	None	None
Asia Pacific	A1530	850, 900, 1900, 2100 MHz	None	FDD-LTE (1, 2, 3, 5, 7, 8, 20); TD-LTE (38, 39, 40)

† Please note that in the US, only the GSM version of the A1533 iPhone 5s is available unlocked and without a contract and it does not support CDMA networks.

For complete details regarding specific LTE support, it will be necessary to check with specific carrier(s) in a particular location.

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• Thanks for the info -zdpchen- ♀ (320 bytes) () 02/03/2014 postreply 05:21:54