1. SIM: Micro SIM.
   
2. Operation System: Proprietary
   
3. Network: 3G
   Note: Note: Limited 4G LTE availability in select markets. 4G speeds delivered by HSPA+ (with enhanced backhaul) and LTE, where applicable. Not available everywhere. Deployment ongoing. Compatible device and data plan required. Learn more at www.att.com/network.
   
4. Frequency: UMTS/HSDPA: 850/1900/2100MHz GSM/GPRS/EDGE: 850/900/1800/1900MHz
   Note: Refer to International Services for equipment, roaming partner, pricing, and available services information.
   
5. Dimensions: 4.49 x 2.32 x 0.51in Weight: 4.49 Use Time: Up to 6.8 hours Standby Time: Up to 20 days Removable Battery: Yes
   
6. Internal Memory: 42MB Expandable Memory: Storage up to 32GB