The Leoxsys 3G USB Modem (LN-72V) is a supremely useful 3G USB universal modem with voice call support. It features auto APN function and it supports 8GB MicroSD card. It also acts as USB storage. You can insert any Indian operator sim card and can browse the internet.Simply insert 3G SIM card from any 2G/3G/GMS/EDGE/WCDMA operator into LN-72V modem and get upto 7.2MBPS Download and 394 Kbps upload speed. In fact, you can enjoy making and receiving voice call while surfing the internet. It supports zero-CDROM auto-installation. Its RGB LED indicates different states. This miniature device also supports SMS and data service and simultaneous operation. It supports Win2000/ XP/VISTA, Windows 7 operating system. Moreover, it supports 100 numbers phonebook of modem and 2.1/3.0 vCard version. Additionally, it supports other phonebook and SMS features like group messages, 255 SMS Capability on modem, new contacts, edit contacts etc.