 NDTV | Zen Mobile launches dual-SIM Ultraphone U4 with 4.3-inch display, Android 2.3 NDTV Back in November last year, Zen had launched the Ultraphone U1 with Android 2.3, 1GHz processor and 3.5-inch display for Rs. 4,999. Zen Ultraphone U4 specifications. 1GHz processor; 512MB internal storage, expandable by 32GB; 3.2-megapixel camera ... Zen Ultraphone U4 Android smartphone launched in India for Rs 6499 Zen Mobile launches ultraphone U4 Android handset |