World’s slimmest Windows Phone Yezz Billy 4.7 (7.2mm thin) can be purchased online in USA with a price $179 through Microsoft store.
The Yezz Billy 4.7 runs Windows Phone 8.1 OS and supports dual micro SIM (WCDMA+GSM) with dual standby functionality. It comes with 1GB of RAM and is also equipped with 8GB of internal storage that is further expandable with up to 128GB microSD card.
The Billy 4.7 houses an 8-megapixel auto-focus rear shooter and also boasts a 2-megapixel front camera. Connectivity options include Wi-Fi 802.11b/g/n, Bluetooth 4.0, micro-USB v2.0, mobile hotspot, GPS, GLONASS and 3.5mm audio jack.