The following information is subject to change:XT1540: Single-SIM (Retail US | Canada (Telus) | Latin America (Tigo, Movistar Mexico))
XT1541: Single-SIM (Retail EU | GB | SP | FR | GER)
XT1542: Single-SIM (Retail Latin America (Movistar Columbia))
XT1543: Dual-SIM (Retail Brazil | Latin America)
XT1544: Dual-SIM with Digital TV (HDTV) (Retail Brazil | Latin America)
XT1548: Single-SIM (US - CDMA Prepaid)
XT1550: Dual-SIM (Retail Asia | India)
XT1556: Dual-SIM (Turbo Edition)
**All Models appear to be available as either 8GB Storage with 1GB RAM or 16GB Storage with 2GB RAM. The only exception is the Turbo Edition, which is 16GB Storage and 2GB RAM only.
Frequency Band Support:XT1540: GSM/GPRS/EDGE: 850, 900, 1800, 1900 - UMTS/HSPA+: 850, 1700/AWS, 1900, 2100 - LTE: B2 (1900), B4 (1700), B5 (850), B7 (2600), B17 (700)
XT1541: GSM/GPRS/EDGE: 850, 900, 1800, 1900 - UMTS/HSPA+: 900, 2100 - LTE: B1 (2100), B3 (1800), B7 (2600), B8 (900), B20 (800)
XT1542: Unknown - Likely same as XT1543
XT1543: GSM/GPRS/EDGE: 850, 900, 1800, 1900 - UMTS/HSPA+: 850, 900, 1700, 1900, 2100 - LTE: B4 (1700), B7 (2600), B28 (700)
XT1544: GSM/GPRS/EDGE: 850, 900, 1800, 1900 - UMTS/HSPA+: 850, 900, 1700, 1900, 2100 - LTE: B4 (1700), B7 (2600), B28 (700)
XT1548: CDMA: 800, 850, 1900 - GSM/GPRS/EDGE: 850, 900, 1800, 1900 - UMTS/HSPA+: 850, 1700, 1900 - LTE: B2 (1900), B4 (1700), B5 (850), B12 (700), B17 (700), B25 (1900), B26 (850) - LTE-TDD: B41 (2500)
XT1550: GSM/GPRS/EDGE: 850, 900, 1800, 1900 - UMTS/HSPA+: 900, 2100 - LTE: B1 (2100), B3 (1800), B7 (2600), B8 (900), B28 (700) - LTE-TDD: B40 (2300)
XT1556: GSM/GPRS/EDGE: 850, 900, 1700, 1900 - UMTS/HSPA+: 850, 900, 1700, 1900, 2100 - LTE: B4 (1700), B7 (2600), B28 (700)