MODEL: HUAWEI B311s-221
PRODUCT DETAIL: 4G WIFI ROUTER(SIM)​​
B311 is latest router upgrade from succesful B310 , it is loaded with huawei latest software , increase signal strength , enhance security feature. ,re-engineering to use single antenna instead of one pair antenna. 
 
4G BAND: LTE FDD B1(2100Mhz) / B3(1800Mhz) / B7(2600Mhz) / B8(900Mhz) / B20(800Mhz)
3G BAND: UMTS B1(2100Mhz) /B8 (900Mhz)
2G BAND: GSM B2/B3/B5/B8
 
Supported Singtel , Starhub , M1 , Cycle ,Maxis ,Celcom ,Digi, Umobile (x  Unlimited plan) ,XOX, Tunetalk + Oversea Network 
 
4G SPEED:​
LTE DL Speed up to 150 Mbit/s
LTE UL Speed up to 50 Mbit/s
 
FEATURE:
1 x standard sim card slot - Standard SIM (15 x 25mm)
One connectors for external antennas (SMA Connector)
One Telephone port and one GE port for LAN/WLAN (IEEE 802.3/802.3u
Ability to call / recevied call from the analog phone connected to modem
Easy to use , all auto no setting necessary
VPN client service (L2TP, PPTP) 
Slim and beatiful design
WiFi 802.11b/g/n, Wireless speed to 300Mbps
Up to 32 wireless users could be connected simultaneously
Dimensions: 181.0mm x 126.0mm x 70.0mm
Weight: about 226g