Samsung has announced the launch of three new Dual SIM phones in India. The new devices include the Samsung Star Duos GT-B7722, the Guru Dual 25 and Guru Dual 26.Let's take a look at these devices in detail.We start with the GT-B7722 Duos. This handset is touted to be the first 3G + 2G Dual-Standby touchscreen phone on the planet! This GSM + GSM handset features support for Active Sync, Microsoft Office files and even has a PDF reader - making it a decent entry level office phone. It also has a 5 megapixel autofocus camera with an LED flash. Connectivity options include Bluetooth, Wi-Fi and USB. It also has 250MB of internal memory. It is priced at Rs. 12,300.Next, we have the Samsung Guru Dual 25 (GT- E1225) and Samsung Guru Dual...