Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Motorola RAZR V3 Gold Cellular Phone (Unlocked)
Product description: One of the thinnest clamshell phones in the world. This feature-packed, quad-band GSM phone sports a sleek metal design, dual color displays, a VGA camera, long-range Bluetooth, MPEG4 video clip playback, and Java 2.0 with 3D graphics.
Product feature: 3.86" x 2.09" x 0.54", GSM 850 / GSM 900 / GSM 1800 / GSM 1900, Talk: 6.7 hours - Standby: 250 hours, Phone Book Capacity 1000, Weight 3.42 oz, Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.
Product brand: Motorola
Target attributes: Operating System
Answer: attribute: operating system
value: None
source: None